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Diffstat (limited to 'libs/pthreads/docs/ChangeLog')
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diff --git a/libs/pthreads/docs/ChangeLog b/libs/pthreads/docs/ChangeLog new file mode 100644 index 0000000000..42abcc457a --- /dev/null +++ b/libs/pthreads/docs/ChangeLog @@ -0,0 +1,5211 @@ +2012-03-18 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * create.c (pthread_create): add __cdecl attribute to thread routine + arg + * implement.h (pthread_key_t): add __cdecl attribute to destructor + element + (ThreadParms): likewise for start element + * pthread.h (pthread_create): add __cdecl to prototype start arg + (pthread_once): likewise for init_routine arg + (pthread_key_create): likewise for destructor arg + (ptw32_cleanup_push): replace type of routine arg with previously + defined ptw32_cleanup_callback_t + * pthread_key_create.c: add __cdecl attribute to destructor arg + * pthread_once.c: add __cdecl attribute to init_routine arg + * ptw32_threadStart.c (start): add __cdecl to start variable type + + +2011-07-06 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * pthread_cond_wait.c (pragma inline_depth): this is almost redundant + now nevertheless fixed thei controlling MSC_VER from "< 800" to + "< 1400" (i.e. any prior to VC++ 8.0). + * pthread_once.ci (pragma inline_depth): Likewise. + * pthread_rwlock_timedwrlock.ci (pragma inline_depth): Likewise. + * pthread_rwlock_wrlock.ci (pragma inline_depth): Likewise. + * sem_timedwait.ci (pragma inline_depth): Likewise. + * sem_wait.ci (pragma inline_depth): Likewise. + +2011-07-05 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * pthread_win32_attach_detach_np.c: Use strncat_s if available + to removei a compile warning; MingW supports this routine but we + continue to use strncat anyway there because it is secure if + given the correct parameters; fix strncat param 3 to avoid + buffer overrun exploitation potential. + +2011-07-03 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * pthread_spin_unlock.c (EPERM): Return success if unlocking a lock + that is not locked, because single CPU machines wrap a + PTHREAD_MUTEX_NORMAL mutex, which returns success in this case. + * pthread_win32_attach_detach_np.c (QUSEREX.DLL): Load from an + absolute path only which must be the Windows System folder. + +2011-07-03 Daniel Richard G. <skunk at iskunk dot org> + + * Makefile (_WIN32_WINNT): Removed; duplicate definition in + implement.h; more cleanup and enhancements. + +2011-07-02 Daniel Richard G. <skunk at iskunk dot org> + + * Makefile: Cleanups and implovements. + * ptw32_MCS_locks.c: Casting fixes. + * implement.h: Interlocked call and argument casting macro fixes + to support older and newer build environments. + +2011-07-01 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * *.[ch] (PTW32_INTERLOCKED_*): Redo 23 and 64 bit versions of these + macros and re-apply in code to undo the incorrect changes from + 2011-06-29; remove some size_t casts which should not be required + and may be problematic.a + There are now two sets of macros: + PTW32_INTERLOCKED_*_LONG which work only on 32 bit integer variables; + PTW32_INTERLOCKED_*_SIZE which work on size_t integer variables, i.e. + LONG for 32 bit systems and LONGLONG for 64 bit systems. + * implement.h (MCS locks): nextFlag and waitFlag are now HANDLE type. + * ptw32_MCS_locks.c: Likewise. + * pthread.h (#include <setjmp.h>): Removed. + * ptw32_throw.c (#include <setjmp.h>): Added. + * ptw32_threadStart.c (#include <setjmp.h>): Added. + * implement.h (#include <setjmp.h>): Added. + +2011-06-30 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * pthread_once.c: Tighten 'if' statement casting; fix interlocked + pointer cast for 64 bit compatibility (missed yesterday); remove + the superfluous static cleanup routine and call the release routine + directly if popped. + * create.c (stackSize): Now type size_t. + * pthread.h (struct ptw32_thread_t_): Rearrange to fix element alignments. + +2011-06-29 Daniel Richard G. <skunk at iskunk dot org> + + * ptw32_relmillisecs.c (ftime): + _ftime64_s() is only available in MSVC 2005 or later; + _ftime64() is available in MinGW or MSVC 2002 or later; + _ftime() is always available. + * pthread.h (long long): Not defined in older MSVC 6. + * implement.h (long long): Likewise. + * pthread_getunique_np.c (long long): Likewise. + +2011-06-29 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * *.[ch] (PTW32_INTERLOCKED_*): These macros should now work for + both 32 and 64 bit builds. The MingW versions are all inlined asm + while the MSVC versions expand to their Interlocked* or Interlocked*64 + counterparts appropriately. The argument type have also been changed + to cast to the appropriate value or pointer size for the architecture. + +2011-05-29 Ross Johnson <ross dot johnson at homemail dot com dot au> + + * *.[ch] (#ifdef): Extended cleanup to whole project. + +2011-05-29 Daniel Richard G. <skunk at iskunk dot org> + + * Makefile (CC): Define CC to allow use of other compatible + compilers such as the Intel compilter icl. + * implement.h (#if): Fix forms like #if HAVE_SOMETHING. + * pthread.h: Likewise. + * sched.h: Likewise; PTW32_LEVEL_* becomes PTW32_SCHED_LEVEL_*. + * semaphore.h: Likewise. + +2011-05-11 Ross Johnson <ross.johnson at homemail.com.au> + + * ptw32_callUserDestroyRoutines.c (terminate): Altered includes + to match ptw32_threadStart.c. + * GNUmakefile (GCE-inlined-debug, DOPT): Fixed. + +2011-04-31 Ross Johnson <ross.johnson at homemail.com.au> + + * (robust mutexes): Added this API. The API is not + mandatory for implementations that don't support PROCESS_SHARED + mutexes, nevertheless it was considered useful both functionally + and for source-level compatibility. + +2011-03-26 Ross Johnson <ross.johnson at homemail.com.au> + + * pthread_getunique_np.c: New non-POSIX interface for compatibility + with some other implementations; returns a 64 bit sequence number + that is unique to each thread in the process. + * pthread.h (pthread_getunique_np): Added. + * global.c: Add global sequence counter for above. + * implement.h: Likewise. + +2011-03-25 Ross Johnson <ross.johnson at homemail.com.au> + + * (cancelLock): Convert to an MCS lock and rename to stateLock. + * (threadLock): Likewise. + * (keyLock): Likewise. + * pthread_mutex*.c: First working robust mutexes. + +2011-03-11 Ross Johnson <ross.johnson at homemail.com.au> + + * implement.h (PTW32_INTERLOCKED_*CREMENT macros): increment/decrement + using ++/-- instead of add/subtract 1. + * ptw32_MCS_lock.c: Make casts consistent. + +2011-03-09 Ross Johnson <ross.johnson at homemail.com.au> + + * implement.h (ptw32_thread_t_): Add process unique sequence number. + * global.c: Replace global Critical Section objects with MCS + queue locks. + * implement.h: Likewise. + * pthread_cond_destroy.c: Likewise. + * pthread_cond_init.c: Likewise. + * pthread_detach.c: Likewise. + * pthread_join.c: Likewise. + * pthread_kill.c: Likewise. + * pthread_mutex_destroy.c: Likewise. + * pthread_rwlock_destroy.c: Likewise. + * pthread_spin_destroy.c: Likewise. + * pthread_timechange_handler_np.c: Likewise. + * ptw32_cond_check_need_init.c: Likewise. + * ptw32_mutex_check_need_init.c: Likewise. + * ptw32_processInitialize.c: Likewise. + * ptw32_processTerminate.c: Likewise. + * ptw32_reuse.c: Likewise. + * ptw32_rwlock_check_need_init.c: Likewise. + * ptw32_spinlock_check_need_init.c: Likewise. + +2011-03-06 Ross Johnson <ross.johnson at homemail.com.au> + + * several (MINGW64): Cast and call fixups for 64 bit compatibility; + clean build via x86_64-w64-mingw32 cross toolchain on Linux i686 + targeting x86_64 win64. + * ptw32_threadStart.c (ptw32_threadStart): Routine no longer attempts + to pass [unexpected C++] exceptions out of scope but ends the thread + normally setting EINTR as the exit status. + * ptw32_throw.c: Fix C++ exception throwing warnings; ignore + informational warning. + * implement.h: Likewise with the corresponding header definition. + +2011-03-04 Ross Johnson <ross.johnson at homemail.com.au> + + * implement.h (PTW32_INTERLOCKED_*): Mingw32 does not provide + the __sync_* intrinsics so implemented them here as macro + assembler routines. MSVS Interlocked* are emmitted as intrinsics + wherever possible, so we want mingw to match it; Extended to + include all interlocked routines used by the library; implemented + x86_64 versions also. + * ptw32_InterlockedCompareExchange.c: No code remaining here. + * ptw32_MCS_lock.c: Converted interlocked calls to use new macros. + * pthread_barrier_wait.c: Likewise. + * pthread_once.c: Likewise. + * ptw32_MCS_lock.c (ptw32_mcs_node_substitute): Name changed to + ptw32_mcs_node_transfer. + +2011-02-28 Ross Johnson <ross.johnson at homemail.com.au> + + * ptw32_relmillisecs.c: If possible, use _ftime64_s or _ftime64 + before resorting to _ftime. + +2011-02-27 Ross Johnson <ross.johnson at homemail.com.au> + + * sched_setscheduler.c: Ensure the handle is closed after use. + * sched_getscheduler.c: Likewise. + * pthread.h: Remove POSIX compatibility macros; don't define + timespec if already defined. + * context.h: Changes for 64 bit. + * pthread_cancel.c: Likewise. + * pthread_exit.c: Likewise. + * pthread_spin_destroy.c: Likewise. + * pthread_timechange_handler_np.c: Likewise. + * ptw32_MCS_lock.c: Likewise; some of these changes may + not be compatible with pre Windows 2000 systems; reverse the order of + the includes. + * ptw32_threadStart.c: Likewise. + * ptw32_throw.c: Likewise. + +2011-02-13 Ross Johnson <ross.johnson at homemail.com.au> + + * pthread_self: Add comment re returning 'nil' value to + indicate failure only to win32 threads that call us. + * pthread_attr_setstackaddr: Fix comments; note this + function and it's compliment are now removed from SUSv4. + +2011-02-12 Ross Johnson <ross.johnson at homemail.com.au> + + README.NONPORTABLE: Record a description of an obvious + method for nulling/comparing/hashing pthread_t using a + union; plus and investigation of a change of type for + pthread_t (to a union) to neutralise any padding bits and + bytes if they occur in pthread_t (the current pthread_t struct + does not contain padding AFAIK, but porting the library to a + future architecture may introduce them). Padding affects + byte-by-byte copies and compare operations. + +2010-11-16 Ross Johnson <ross.johnson at homemail.com.au> + + * ChangeLog: Add this entry ;-) + Restore entries from 2007 through 2009 that went missing + at the last update. + +2010-06-19 Ross Johnson <ross.johnson at homemail.com.au> + + * ptw32_MCS_lock.c (ptw32_mcs_node_substitute): Fix variable + names to avoid using C++ keyword ("new"). + * implement.h (ptw32_mcs_node_substitute): Likewise. + * pthread_barrier_wait.c: Fix signed/unsigned comparison warning. + +2010-06-18 Ramiro Polla <ramiro.polla at gmail.com > + + * autostatic.c: New file; call pthread_win32_process_*() + libary init/cleanup routines automatically on application start + when statically linked. + * pthread.c (autostatic.c): Included. + * pthread.h (declspec): Remove import/export defines if compiler + is MINGW. + * sched.h (declspec): Likewise. + * semaphore.h (declspec): Likewise. + * need_errno.h (declspec): Likewise. + * Makefile (autostatic.obj): Add for small static builds. + * GNUmakefile (autostatic.o): Likewise. + * NEWS (Version 2.9.0): Add changes. + * README.NONPORTABLE (pthread_win32_process_*): Update + description. + +2010-06-15 Ramiro Polla <ramiro.polla at gmail.com > + + * Makefile: Remove linkage with the winsock library by default. + * GNUmakefile: Likewise. + * pthread_getspecific.c: Likewise by removing calls to WSA + functions. + * config.h (RETAIN_WSALASTERROR): Can be defined if necessary. + +2010-01-26 Ross Johnson <ross.johnson at homemail.com.au> + + * ptw32_MCS_lock.c (ptw32_mcs_node_substitute): New routine + to allow relocating the lock owners thread-local node to somewhere + else, e.g. to global space so that another thread can release the + lock. Used in pthread_barrier_wait. + (ptw32_mcs_lock_try_acquire): New routine. + * pthread_barrier_init: Only one semaphore is used now. + * pthread_barrier_wait: Added an MCS guard lock with the last thread + to leave the barrier releasing the lock. This removes a deadlock bug + observed when there are greater than barrier-count threads + attempting to cross. + * pthread_barrier_destroy: Added an MCS guard lock. + +2009-03-03 Stephan O'Farrill <stephan dot ofarrill at gmail dot com> + + * pthread_attr_getschedpolicy.c: Add "const" to function parameter + in accordance with SUSv3 (POSIX). + * pthread_attr_getinheritsched.c: Likewise. + * pthread_mutexattr_gettype.c: Likewise. + +2008-06-06 Robert Kindred <RKindred at SwRI dot edu> + + * ptw32_throw.c (ptw32_throw): Remove possible reference to NULL + pointer. (At the same time made the switch block conditionally + included only if exitCode is needed - RPJ.) + * pthread_testcancel.c (pthread_testcancel): Remove duplicate and + misplaced pthread_mutex_unlock(). + +2008-02-21 Sebastian Gottschalk <seppig_relay at gmx dot de> + + * pthread_attr_getdetachstate.c (pthread_attr_getdetachstate): + Remove potential and superfluous null pointer assignment. + +2007-11-22 Ivan Pizhenko <ivanp4 at ua dot fm> + + * pthread.h (gmtime_r): gmtime returns 0 if tm represents a time + prior to 1/1/1970. Notice this to prevent raising an exception. + * pthread.h (localtime_r): Likewise for localtime. + +2007-07-14 Marcel Ruff <mr at marcelruff dot info> + + * errno.c (_errno): Fix test for pthread_self() success. + * need_errno.h: Remove unintentional line wrap from #if line. + +2007-07-14 Mike Romanchuk <mromanchuk at empirix dot com> + + * pthread.h (timespec): Fix tv_sec type. + +2007-01-07 Sinan Kaya <sinan.kaya at siemens dot com> + + * need_errno.h: Fix declaration of _errno - the local version of + _errno() is used, e.g. by WinCE. + +2007-01-06 Ross Johnson <ross.johnson at homemail dot com dot au> + + * ptw32_semwait.c: Add check for invalid sem_t after acquiring the + sem_t state guard mutex and before affecting changes to sema state. + +2007-01-06 Marcel Ruff <mr at marcelruff dot info> + + * error.c: Fix reference to pthread handle exitStatus member for + builds that use NEED_ERRNO (i.e. WINCE). + * context.h: Add support for ARM processor (WinCE). + * mutex.c (process.h): Exclude for WINCE. + * create.c: Likewise. + * exit.c: Likewise. + * implement.h: Likewise. + * pthread_detach.c (signal.h): Exclude for WINCE. + * pthread_join.c: Likewise. + * pthread_kill.c: Likewise. + * pthread_rwlock_init.c (errno.h): Remove - included by pthread.h. + * pthread_rwlock_destroy.c: Likewise. + * pthread_rwlock_rdlock.c: Likewise. + * pthread_rwlock_timedrdlock.c: Likewise. + * pthread_rwlock_timedwrlock.c: Likewise. + * pthread_rwlock_tryrdlock.c: Likewise. + * pthread_rwlock_trywrlock.c: likewise. + * pthread_rwlock_unlock.c: Likewise. + * pthread_rwlock_wrlock.c: Likewise. + * pthread_rwlockattr_destroy.c: Likewise. + * pthread_rwlockattr_getpshared.c: Likewise. + * pthread_rwlockattr_init.c: Likewise. + * pthread_rwlockattr_setpshared.c: Likewise. + +2007-01-06 Romano Paolo Tenca <rotenca at telvia dot it> + + * pthread_cond_destroy.c: Replace sem_wait() with non-cancelable + ptw32_semwait() since pthread_cond_destroy() is not a cancelation + point. + * implement.h (ptw32_spinlock_check_need_init): Add prototype. + * ptw32_MCS_lock.c: Reverse order of includes. + +2007-01-06 Eric Berge <eric dot berge at quantum dot com> + + * pthread_cond_destroy.c: Add LeaveCriticalSection before returning + after errors. + +2007-01-04 Ross Johnson <ross.johnson at homemail dot com dot au> + + * ptw32_InterlockedCompareExchange.c: Conditionally skip for + Win64 as not required. + * pthread_win32_attach_detach_np.c (pthread_win32_process_attach_np): + Test for InterlockedCompareExchange is not required for Win64. + * context.h: New file. Included by pthread_cancel.h and any tests + that need it (e.g. context1.c). + * pthread_cancel.c: Architecture-dependent context macros moved + to context.h. + +2007-01-04 Kip Streithorst <KSTREITH at ball dot com> + + * implement.h (PTW32_INTERLOCKED_COMPARE_EXCHANGE): Add Win64 + support. + +2006-12-20 Ross Johnson <ross.johnson at homemail.com.au> + + * sem_destroy.c: Fix the race involving invalidation of the sema; + fix incorrect return of EBUSY resulting from the mutex trylock + on the private mutex guard. + * sem_wait.c: Add check for invalid sem_t after acquiring the + sem_t state guard mutex and before affecting changes to sema state. + * sem_trywait.c: Likewise. + * sem_timedwait.c: Likewise. + * sem_getvalue.c: Likewise. + * sem_post.c: Similar. + * sem_post_multiple.c: Likewise. + * sem_init.c: Set max Win32 semaphore count to SEM_VALUE_MAX (was + _POSIX_SEM_VALUE_MAX, which is a lower value - the minimum). + + * pthread_win32_attach_detach_np.c (pthread_win32_process_attach_np): + Load COREDLL.DLL under WINCE to check existence of + InterlockedCompareExchange() routine. This used to be done to test + for TryEnterCriticalSection() but was removed when this was no + longer needed. + +2006-01-25 Prashant Thakre <prashant.thakre at gmail.com> + + * pthread_cancel.c: Added _M_IA64 register context support. + +2005-05-13 Ross Johnson <ross at callisto.canberra.edu.au> + + * pthread_kill.c (pthread_kill): Remove check for Win32 thread + priority (to confirm HANDLE validity). Useless since thread HANDLEs + a not recycle-unique. + +2005-05-30 Vladimir Kliatchko <vladimir at kliatchko.com> + + * pthread_once.c: Re-implement using an MCS queue-based lock. The form + of pthread_once is as proposed by Alexander Terekhov (see entry of + 2005-03-13). The MCS lock implementation does not require a unique + 'name' to identify the lock between threads. Attempts to get the Event + or Semaphore based versions of pthread_once to a satisfactory level + of robustness have thus far failed. The last problem (avoiding races + involving non recycle-unique Win32 HANDLEs) was giving everyone + grey hair trying to solve it. + + * ptw32_MCS_lock.c: New MCS queue-based lock implementation. These + locks are efficient: they have very low overhead in the uncontended case; + are efficient in contention and minimise cache-coherence updates in + managing the user level FIFO queue; do not require an ABI change in the + library. + +2005-05-27 Alexander Gottwald <alexander.gottwald at s1999.tu-chemnitz.de> + + * pthread.h: Some things, like HANDLE, were only defined if + PTW32_LEVEL was >= 3. They should always be defined. + +2005-05-25 Vladimir Kliatchko <vladimir at kliatchko.com> + + * pthread_once.c: Eliminate all priority operations and other + complexity by replacing the event with a semaphore. The advantage + of the change is the ability to release just one waiter if the + init_routine thread is cancelled yet still release all waiters when + done. Simplify once_control state checks to improve efficiency + further. + +2005-05-24 Mikael Magnusson <mikaelmagnusson at glocalnet.net> + + * GNUmakefile: Patched to allow cross-compile with mingw32 on Linux. + It uses macros instead of referencing dlltool, gcc and g++ directly; + added a call to ranlib. For example the GC static library can be + built with: + make CC=i586-mingw32msvc-gcc RC=i586-mingw32msvc-windres \ + RANLIB=i586-mingw32msvc-ranlib clean GC-static + +2005-05-13 Ross Johnson <ross at callisto.canberra.edu.au> + + * pthread_win32_attach_detach_np.c (pthread_win32_thread_detach_np): + Move on-exit-only stuff from ptw32_threadDestroy() to here. + * ptw32_threadDestroy.c: It's purpose is now only to reclaim thread + resources for detached threads, or via pthread_join() or + pthread_detach() on joinable threads. + * ptw32_threadStart.c: Calling user destruct routines has moved to + pthread_win32_thread_detach_np(); call pthread_win32_thread_detach_np() + directly if statically linking, otherwise do so via dllMain; store + thread return value in thread struct for all cases, including + cancellation and exception exits; thread abnormal exits go via + pthread_win32_thread_detach_np. + * pthread_join.c (pthread_join): Don't try to get return code from + Win32 thread - always get it from he thread struct. + * pthread_detach.c (pthread_detach): reduce extent of the thread + existence check since we now don't care if the Win32 thread HANDLE has + been closed; reclaim thread resources if the thread has exited already. + * ptw32_throw.c (ptw32_throw): For Win32 threads that are not implicit, + only Call thread cleanup if statically linking, otherwise leave it to + dllMain. + * sem_post.c (_POSIX_SEM_VALUE_MAX): Change to SEM_VALUE_MAX. + * sem_post_multiple.c: Likewise. + * sem_init.c: Likewise. + +2005-05-10 Ross Johnson <ross at callisto.canberra.edu.au> + + * pthread_join.c (pthread_join): Add missing check for thread ID + reference count in thread existence test; reduce extent of the + existence test since we don't care if the Win32 thread HANDLE has + been closed. + +2005-05-09 Ross Johnson <ross at callisto.canberra.edu.au> + + * ptw32_callUserDestroyRoutines.c: Run destructor process (i.e. + loop over all keys calling destructors) up to + PTHREAD_DESTRUCTOR_ITERATIONS times if TSD value isn't NULL yet; + modify assoc management. + * pthread_key_delete.c: Modify assoc management. + * ptw32_tkAssocDestroy.c: Fix error in assoc removal from chains. + * pthread.h + (_POSIX_THREAD_DESTRUCTOR_ITERATIONS): Define to value specified by + POSIX. + (_POSIX_THREAD_KEYS_MAX): Define to value specified by POSIX. + (PTHREAD_KEYS_MAX): Redefine [upward] to minimum required by POSIX. + (SEM_NSEMS_MAX): Define to implementation value. + (SEM_VALUE_MAX): Define to implementation value. + (_POSIX_SEM_NSEMS_MAX): Redefine to value specified by POSIX. + (_POSIX_SEM_VALUE_MAX): Redefine to value specified by POSIX. + +2005-05-06 Ross Johnson <ross at callisto.canberra.edu.au> + + * signal.c (sigwait): Add a cancellation point to this otherwise + no-op. + * sem_init.c (sem_init): Check for and return ERANGE error. + * sem_post.c (sem_post): Likewise. + * sem_post_multiple.c (sem_post_multiple): Likewise. + * manual (directory): Added; see ChangeLog inside. + +2005-05-02 Ross Johnson <ross at callisto.canberra.edu.au> + + * implement.h (struct pthread_key_t_): Change threadsLock to keyLock + so as not to be confused with the per thread lock 'threadlock'; + change all references to it. + * implement.h (struct ThreadKeyAssoc): Remove lock; add prevKey + and prevThread pointers; re-implemented all routines that use this + struct. The effect of this is to save one handle per association, + which could potentially equal the number of keys multiplied by the + number of threads, accumulating over time - and to free the + association memory as soon as it is no longer referenced by either + the key or the thread. Previously, the handle and memory were + released only after BOTH key and thread no longer referenced the + association. That is, often no association resources were released + until the process itself exited. In addition, at least one race + condition has been removed - where two threads could attempt to + release the association resources simultaneously - one via + ptw32_callUserDestroyRoutines and the other via + pthread_key_delete. + - thanks to Richard Hughes at Aculab for discovering the problem. + * pthread_key_create.c: See above. + * pthread_key_delete.c: See above. + * pthread_setspecific.c: See above. + * ptw32_callUserDestroyRoutines.c: See above. + * ptw32_tkAssocCreate.c: See above. + * ptw32_tkAssocDestroy.c: See above. + +2005-04-27 Ross Johnson <ross at callisto.canberra.edu.au> + + * sem_wait.c (ptw32_sem_wait_cleanup): after cancellation re-attempt + to acquire the semaphore to avoid a race with a late sem_post. + * sem_timedwait.c: Modify comments. + +2005-04-25 Ross Johnson <ross at callisto.canberra.edu.au> + + * ptw32_relmillisecs.c: New module; converts future abstime to + milliseconds relative to 'now'. + * pthread_mutex_timedlock.c: Use new ptw32_relmillisecs routine in + place of internal code; remove the NEED_SEM code - this routine is now + implemented for builds that define NEED_SEM (WinCE etc) + * sem_timedwait.c: Likewise; after timeout or cancellation, + re-attempt to acquire the semaphore in case one has been posted since + the timeout/cancel occurred. Thanks to Stefan Mueller. + * Makefile: Add ptw32_relmillisecs.c module; remove + ptw32_{in,de}crease_semaphore.c modules. + * GNUmakefile: Likewise. + * Bmakefile: Likewise. + + * sem_init.c: Re-write the NEED_SEM code to be consistent with the + non-NEED_SEM code, but retaining use of an event in place of the w32 sema + for w32 systems that don't include semaphores (WinCE); + the NEED_SEM versions of semaphores has been broken for a long time but is + now fixed and supports all of the same routines as the non-NEED_SEM case. + * sem_destroy.c: Likewise. + * sem_wait.c: Likewise. + * sem_post.c: Likewise. + * sem_post_multple.c: Likewise. + * implement.h: Likewise. + * sem_timedwait.c: Likewise; this routine is now + implemented for builds that define NEED_SEM (WinCE etc). + * sem_trywait.c: Likewise. + * sem_getvalue.c: Likewise. + + * pthread_once.c: Yet more changes, reverting closer to Gottlob Frege's + first design, but retaining cancellation, priority boosting, and adding + preservation of W32 error codes to make pthread_once transparent to + GetLastError. + +2005-04-11 Ross Johnson <ross at callisto.canberra.edu.au> + + * pthread_once.c (pthread_once): Added priority boosting to + solve starvation problem after once_routine cancellation. + See notes in file. + +2005-04-06 Kevin Lussier <Kevin at codegreennetworks.com> + + * Makefile: Added debug targets for all versions of the library. + +2005-04-01 Ross Johnson <ross at callisto.canberra.edu.au> + + * GNUmakefile: Add target to build libpthreadGC1.a as a static link + library. + * Makefile: Likewise for pthreadGC1.lib. + +2005-04-01 Kevin Lussier <Kevin at codegreennetworks.com> + + * sem_timedwait.c (sem_timedwait): Increase size of temp variables to + avoid int overflows for large timeout values. + * implement.h (int64_t): Include or define. + +2005-03-31 Dimitar Panayotov <develop at mail.bg>^M + + * pthread.h: Fix conditional defines for static linking. + * sched.h: Liekwise. + * semaphore.h: Likewise. + * dll.c (PTW32_STATIC_LIB): Module is conditionally included + in the build. + +2005-03-16 Ross Johnson <ross at callisto.canberra.edu.au>^M + + * pthread_setcancelstate.c: Undo the last change. + +2005-03-16 Ross Johnson <ross at callisto.canberra.edu.au>^M + + * pthread_setcancelstate.c: Don't check for an async cancel event + if the library is using alertable async cancel.. + +2005-03-14 Ross Johnson <ross at callisto.canberra.edu.au> + + * pthread_once.c (pthread_once): Downgrade interlocked operations to simple + memory operations where these are protected by the critical section; edit + comments. + +2005-03-13 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_once.c (pthread_once): Completely redesigned; a change was + required to the ABI (pthread_once_t_), and resulting in a version + compatibility index increment. + + NOTES: + The design (based on pseudo code contributed by Gottlob Frege) avoids + creating a kernel object if there is no contention. See URL for details:- + http://sources.redhat.com/ml/pthreads-win32/2005/msg00029.html + This uses late initialisation similar to the technique already used for + pthreads-win32 mutexes and semaphores (from Alexander Terekhov). + + The subsequent cancelation cleanup additions (by rpj) could not be implemented + without sacrificing some of the efficiency in Gottlob's design. In particular, + although each once_control uses it's own event to block on, a global CS is + required to manage it - since the event must be either re-usable or + re-creatable under cancelation. This is not needed in the non-cancelable + design because it is able to mark the event as closed (forever). + + When uncontested, a CS operation is equivalent to an Interlocked operation + in speed. So, in the final design with cancelability, an uncontested + once_control operation involves a minimum of five interlocked operations + (including the LeaveCS operation). + + ALTERNATIVES: + An alternative design from Alexander Terekhov proposed using a named mutex, + as sketched below:- + + if (!once_control) { // May be in TLS + named_mutex::guard guard(&once_control2); + if (!once_control2) { + <init> + once_control2 = true; + } + once_control = true; + } + + A more detailed description of this can be found here:- + http://groups.yahoo.com/group/boost/message/15442 + + [Although the definition of a suitable PTHREAD_ONCE_INIT precludes use of the + TLS located flag, this is not critical.] + + There are three primary concerns though:- + 1) The [named] mutex is 'created' even in the uncontended case. + 2) A system wide unique name must be generated. + 3) Win32 mutexes are VERY slow even in the uncontended case. An uncontested + Win32 mutex lock operation can be 50 (or more) times slower than an + uncontested EnterCS operation. + + Ultimately, the named mutex trick is making use of the global locks maintained + by the kernel. + + * pthread.h (pthread_once_t_): One flag and an event HANDLE added. + (PTHREAD_ONCE_INIT): Additional values included. + +2005-03-08 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_once.c (pthread_once): Redesigned to elliminate potential + starvation problem. + - reported by Gottlob Frege <gottlobfrege at gmail.com> + + * ptw32_threadDestroy.c (ptw32_threadDestroy): Implicit threads were + not closing their Win32 thread duplicate handle. + - reported by Dmitrii Semii <bogolt at gmail.com> + +2005-01-25 Ralf Kubis <RKubis at mc.com> + + * Attempted acquisition of recursive mutex was causing waiting + threads to not be woken when the mutex is released. + + * GNUmakefile (GCE): Generate correct version resource comments. + +2005-01-01 Konstantin Voronkov <beowinkle at yahoo.com> + + * pthread_mutex_lock.c (pthread_mutex_lock): The new atomic exchange + mutex algorithm is known to allow a thread to steal the lock off + FIFO waiting threads. The next waiting FIFO thread gets a spurious + wake-up and must attempt to re-acquire the lock. The woken thread + was setting itself as the mutex's owner before the re-acquisition. + +2004-11-22 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Undo change + from 2004-11-02. + * Makefile (DLL_VER): Added for DLL naming suffix - see README. + * GNUmakefile (DLL_VER): Likewise. + * Wmakefile (DLL_VER): Likewise. + * Bmakefile (DLL_VER): Likewise. + * pthread.dsw (version.rc): Added to MSVS workspace. + +2004-11-20 Boudewijn Dekker <b.dekker at ellipsis.nl> + + * pthread_getspecific.c (pthread_getspecific): Check for + invalid (NULL) key argument. + +2004-11-19 Ross Johnson <rpj at callisto.canberra.edu.au> + + * config.h (PTW32_THREAD_ID_REUSE_INCREMENT): Added to allow + building the library for either unique thread IDs like Solaris + or non-unique thread IDs like Linux; allows application developers + to override the library's default insensitivity to some apps + that may not be strictly POSIX compliant. + * version.rc: New resource module to encode version information + within the DLL. + * pthread.h: Added PTW32_VERSION* defines and grouped sections + required by resource compiler together; bulk of file is skipped + if RC_INVOKED. Defined some error numbers and other names for + Borland compiler. + +2004-11-02 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Lock CV mutex at + start of cleanup handler rather than at the end. + * implement.h (PTW32_THREAD_REUSE_EMPTY): Renamed from *_BOTTOM. + (ptw32_threadReuseBottom): New global variable. + * global.c (ptw32_threadReuseBottom): Declare new variable. + * ptw32_reuse.c (ptw32_reuse): Change reuse LIFO stack to LILO queue + to more evenly distribute use of reusable thread IDs; use renamed + PTW32_THREAD_REUSE_EMPTY. + * ptw32_processTerminate.c (ptw2_processTerminate): Use renamed + PTW32_THREAD_REUSE_EMPTY. + +2004-10-31 Ross Johnson <rpj at callisto.canberra.edu.au> + + * implement.h (PThreadState): Add new state value + 'PThreadStateCancelPending'. + * pthread_testcancel.c (pthread_testcancel): Use new thread + 'PThreadStateCancelPending' state as short cut to avoid entering + kernel space via WaitForSingleObject() call. This was obviated + by user space sema acquisition in sem_wait() and sem_timedwait(), + which are also cancelation points. A call to pthread_testcancel() + was required, which introduced a kernel call, effectively nullifying + any gains made by the user space sem acquisition checks. + * pthread_cancel.c (pthread_cancel): Set new thread + 'PThreadStateCancelPending' state. + +2004-10-29 Ross Johnson <rpj at callisto.canberra.edu.au> + + * implement.h (pthread_t): Renamed to ptw32_thread_t; struct contains + all thread state. + * pthread.h (ptw32_handle_t): New general purpose struct to serve + as a handle for various reusable object IDs - currently only used + by pthread_t; contains a pointer to ptw32_thread_t (thread state) + and a general purpose uint for use as a reuse counter or flags etc. + (pthread_t): typedef'ed to ptw32_handle_t; the uint is the reuse + counter that allows the library to maintain unique POSIX thread IDs. + When the pthread struct reuse stack was introduced, threads would + often acquire an identical ID to a previously destroyed thread. The + same was true for the pre-reuse stack library, by virtue of pthread_t + being the address of the thread struct. The new pthread_t retains + the reuse stack but provides virtually unique thread IDs. + * sem_wait.c (ptw32_sem_wait_cleanup): New routine used for + cancelation cleanup. + * sem_timedwait.c (ptw32_sem_timedwait_cleanup): Likewise. + +2004-10-22 Ross Johnson <rpj at callisto.canberra.edu.au> + + * sem_init.c (sem_init): Introduce a 'lock' element in order to + replace the interlocked operations with conventional serialisation. + This is needed in order to be able to atomically modify the sema + value and perform Win32 sema release operations. Win32 semaphores are + used instead of events in order to support efficient multiple posting. + If the whole modify/release isn't atomic, a race between + sem_timedwait() and sem_post() could result in a release when there is + no waiting semaphore, which would cause too many threads to proceed. + * sem_wait.c (sem_wait): Use new 'lock'element. + * sem_timedwait.c (sem_timedwait): Likewise. + * sem_trywait.c (sem_trywait): Likewise. + * sem_post.c (sem_post): Likewise. + * sem_post_multiple.c (sem_post_multiple): Likewise. + * sem_getvalue.c (sem_getvalue): Likewise. + * ptw32_semwait.c (ptw32_semwait): Likewise. + * sem_destroy.c (sem_destroy): Likewise; also tightened the conditions + for semaphore destruction; in particular, a semaphore will not be + destroyed if it has waiters. + * sem_timedwait.c (sem_timedwait): Added cancel cleanup handler to + restore sema value when cancelled. + * sem_wait.c (sem_wait): Likewise. + +2004-10-21 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_mutex_unlock.c (pthread_mutex_unlock): Must use PulseEvent() + rather than SetEvent() to reset the event if there are no waiters. + +2004-10-19 Ross Johnson <rpj at callisto.canberra.edu.au> + + * sem_init.c (sem_init): New semaphore model based on the same idea + as mutexes, i.e. user space interlocked check to avoid + unnecessarily entering kernel space. Wraps the Win32 semaphore and + keeps it's own counter. Although the motivation to do this has existed + for a long time, credit goes to Alexander Terekhov for providing + the logic. I have deviated slightly from AT's logic to add the waiters + count, which has made the code more complicated by adding cancelation + cleanup. This also appears to have broken the VCE (C++ EH) version of + the library (the same problem as previously reported - see BUGS #2), + only apparently not fixable using the usual workaround, nor by turning + all optimisation off. The GCE version works fine, so it is presumed to + be a bug in MSVC++ 6.0. The cancelation exception is thrown and caught + correctly, but the cleanup class destructor is never called. The failing + test is tests\semaphore4.c. + * sem_wait.c (sem_wait): Implemented user space check model. + * sem_post.c (sem_post): Likewise. + * sem_trywait.c (sem_trywait): Likewise. + * sem_timedwait.c (sem_timedwait): Likewise. + * sem_post_multiple.c (sem_post_multiple): Likewise. + * sem_getvalue.c (sem_getvalue): Likewise. + * ptw32_semwait.c (ptw32_semwait): Likewise. + * implement.h (sem_t_): Add counter element. + +2004-10-15 Ross Johnson <rpj at callisto.canberra.edu.au> + + * implement.h (pthread_mutex_t_): Use an event in place of + the POSIX semaphore. + * pthread_mutex_init.c: Create the event; remove semaphore init. + * pthread_mutex_destroy.c: Delete the event. + * pthread_mutex_lock.c: Replace the semaphore wait with the event wait. + * pthread_mutex_trylock.c: Likewise. + * pthread_mutex_timedlock.c: Likewise. + * pthread_mutex_unlock.c: Set the event. + +2004-10-14 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_mutex_lock.c (pthread_mutex_lock): New algorithm using + Terekhov's xchg based variation of Drepper's cmpxchg model. + Theoretically, xchg uses fewer clock cycles than cmpxchg (using IA-32 + as a reference), however, in my opinion bus locking dominates the + equation on smp systems, so the model with the least number of bus + lock operations in the execution path should win, which is Terekhov's + variant. On IA-32 uni-processor systems, it's faster to use the + CMPXCHG instruction without locking the bus than to use the XCHG + instruction, which always locks the bus. This makes the two variants + equal for the non-contended lock (fast lane) execution path on up + IA-32. Testing shows that the xchg variant is faster on up IA-32 as + well if the test forces higher lock contention frequency, even though + kernel calls should be dominating the times (on up IA-32, both + variants used CMPXCHG instructions and neither locked the bus). + * pthread_mutex_timedlock.c pthread_mutex_timedlock(): Similarly. + * pthread_mutex_trylock.c (pthread_mutex_trylock): Similarly. + * pthread_mutex_unlock.c (pthread_mutex_unlock): Similarly. + * ptw32_InterlockedCompareExchange.c (ptw32_InterlockExchange): New + function. + (PTW32_INTERLOCKED_EXCHANGE): Sets up macro to use inlined + ptw32_InterlockedExchange. + * implement.h (PTW32_INTERLOCKED_EXCHANGE): Set default to + InterlockedExchange(). + * Makefile: Building using /Ob2 so that asm sections within inline + functions are inlined. + +2004-10-08 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_mutex_destroy.c (pthread_mutex_destroy): Critical Section + element is no longer required. + * pthread_mutex_init.c (pthread_mutex_init): Likewise. + * pthread_mutex_lock.c (pthread_mutex_lock): New algorithm following + Drepper's paper at http://people.redhat.com/drepper/futex.pdf, but + using the existing semaphore in place of the futex described in the + paper. Idea suggested by Alexander Terekhov - see: + http://sources.redhat.com/ml/pthreads-win32/2003/msg00108.html + * pthread_mutex_timedlock.c pthread_mutex_timedlock(): Similarly. + * pthread_mutex_trylock.c (pthread_mutex_trylock): Similarly. + * pthread_mutex_unlock.c (pthread_mutex_unlock): Similarly. + * pthread_barrier_wait.c (pthread_barrier_wait): Use inlined version + of InterlockedCompareExchange() if possible - determined at + build-time. + * pthread_spin_destroy.c pthread_spin_destroy(): Likewise. + * pthread_spin_lock.c pthread_spin_lock():Likewise. + * pthread_spin_trylock.c (pthread_spin_trylock):Likewise. + * pthread_spin_unlock.c (pthread_spin_unlock):Likewise. + * ptw32_InterlockedCompareExchange.c: Sets up macro for inlined use. + * implement.h (pthread_mutex_t_): Remove Critical Section element. + (PTW32_INTERLOCKED_COMPARE_EXCHANGE): Set to default non-inlined + version of InterlockedCompareExchange(). + * private.c: Include ptw32_InterlockedCompareExchange.c first for + inlining. + * GNUmakefile: Add commandline option to use inlined + InterlockedCompareExchange(). + * Makefile: Likewise. + +2004-09-27 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_mutex_lock.c (pthread_mutex_lock): Separate + PTHREAD_MUTEX_NORMAL logic since we do not need to keep or check some + state required by other mutex types; do not check mutex pointer arg + for validity - leave this to the system since we are only checking + for NULL pointers. This should improve speed of NORMAL mutexes and + marginally improve speed of other type. + * pthread_mutex_trylock.c (pthread_mutex_trylock): Likewise. + * pthread_mutex_unlock.c (pthread_mutex_unlock): Likewise; also avoid + entering the critical section for the no-waiters case, with approx. + 30% reduction in lock/unlock overhead for this case. + * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise; also + no longer keeps mutex if post-timeout second attempt succeeds - this + will assist applications that wish to impose strict lock deadlines, + rather than simply to escape from frozen locks. + +2004-09-09 Tristan Savatier <tristan at mpegtv.com> + * pthread.h (struct pthread_once_t_): Qualify the 'done' element + as 'volatile'. + * pthread_once.c: Concerned about possible race condition, + specifically on MPU systems re concurrent access to multibyte types. + [Maintainer's note: the race condition is harmless on SPU systems + and only a problem on MPU systems if concurrent access results in an + exception (presumably generated by a hardware interrupt). There are + other instances of similar harmless race conditions that have not + been identified as issues.] + +2004-09-09 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread.h: Declare additional types as volatile. + +2004-08-27 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_barrier_wait.c (pthread_barrier_wait): Remove excessive code + by substituting the internal non-cancelable version of sem_wait + (ptw32_semwait). + +2004-08-25 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_join.c (pthread_join): Rewrite and re-order the conditional + tests in an attempt to improve efficiency and remove a race + condition. + +2004-08-23 Ross Johnson <rpj at callisto.canberra.edu.au> + + * create.c (pthread_create): Don't create a thread if the thread + id pointer location (first arg) is inaccessible. A memory + protection fault will result if the thread id arg isn't an accessible + location. This is consistent with GNU/Linux but different to + Solaris or MKS (and possibly others), which accept NULL as meaning + 'don't return the created thread's ID'. Applications that run + using pthreads-win32 will run on all other POSIX threads + implementations, at least w.r.t. this feature. + + It was decided not to copy the Solaris et al behaviour because, + although it would have simplified some application porting (but only + from Solaris to Windows), the feature is not technically necessary, + and the alternative segfault behaviour helps avoid buggy application + code. + +2004-07-01 Anuj Goyal <anuj.goyal at gmail.com> + + * builddmc.bat: New; Windows bat file to build the library. + * config.h (__DMC__): Support for Digital Mars compiler. + * create.c (__DMC__): Likewise. + * pthread_exit.c (__DMC__): Likewise. + * pthread_join.c (__DMC__): Likewise. + * ptw32_threadDestroy.c (__DMC__): Likewise. + * ptw32_threadStart.c (__DMC__): Likewise. + * ptw32_throw.c (__DMC__): Likewise. + +2004-06-29 Anuj Goyal <anuj.goyal at gmail.com> + + * pthread.h (__DMC__): Initial support for Digital Mars compiler. + +2004-06-29 Will Bryant <will.bryant at ecosm.com> + + * README.Borland: New; description of Borland changes. + * Bmakefile: New makefile for the Borland make utility. + * ptw32_InterlockedCompareExchange.c: + Add Borland compatible asm code. + +2004-06-26 Jason Bard <BardJA at Npt.NUWC.Navy.Mil> + + * pthread.h (HAVE_STRUCT_TIMESPEC): If undefined, define it + to avoid timespec struct redefined errors elsewhere in an + application. + +2004-06-21 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER): Mutex + initialiser added for compatibility with Linux threads and + others; currently not included in SUSV3. + * pthread.h (PTHREAD_ERRORCHECK_MUTEX_INITIALIZER): Likewise. + * pthread.h (PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP): Likewise. + * pthread.h (PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP): Likewise. + + * ptw32_mutex_check_need_init.c (ptw32_mutex_check_need_init): + Add new initialisers. + + * pthread_mutex_lock.c (pthread_mutex_lock): Check for new + initialisers. + * pthread_mutex_trylock.c (pthread_mutex_trylock): Likewise. + * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise. + * pthread_mutex_unlock.c (pthread_mutex_unlock): Likewise. + * pthread_mutex_destroy.c (pthread_mutex_destroy): Likewise. + +2004-05-20 Ross Johnson <rpj at callisto.canberra.edu.au> + + * README.NONPORTABLE: Document pthread_win32_test_features_np(). + * FAQ: Update various answers. + +2004-05-19 Ross Johnson <rpj at callisto.canberra.edu.au> + + * Makefile: Don't define _WIN32_WINNT on compiler command line. + * GNUmakefile: Likewise. + +2004-05-16 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_cancel.c (pthread_cancel): Adapted to use auto-detected + QueueUserAPCEx features at run-time. + (ptw32_RegisterCancelation): Drop in replacement for QueueUserAPCEx() + if it can't be used. Provides older style non-preemptive async + cancelation. + * pthread_win32_attach_detach_np.c (pthread_win32_attach_np): + Auto-detect quserex.dll and the availability of alertdrv.sys; + initialise and close on process attach/detach. + * global.c (ptw32_register_cancelation): Pointer to either + QueueUserAPCEx() or ptw32_RegisterCancelation() depending on + availability. QueueUserAPCEx makes pre-emptive async cancelation + possible. + * implement.h: Add definitions and prototypes related to QueueUserAPC. + +2004-05-16 Panagiotis E. Hadjidoukas <peh at hpclab.ceid.upatras.gr> + + * QueueUserAPCEx (separate contributed package): Provides preemptive + APC feature. + * pthread_cancel.c (pthread_cancel): Initial integration of + QueueUserAPCEx into pthreads-win32 to provide true pre-emptive + async cancelation of threads, including blocked threads. + +2004-05-06 Makoto Kato <raven at oldskool.jp> + + * pthread.h (DWORD_PTR): Define typedef for older MSVC. + * pthread_cancel.c (AMD64): Add architecture specific Context register. + * ptw32_getprocessors.c: Use correct types (DWORD_PTR) for mask + variables. + +2004-04-06 P. van Bruggen <pietvb at newbridges.nl> + + * ptw32_threadDestroy.c: Destroy threadLock mutex to + close a memory leak. + +2004-02-13 Gustav Hallberg <gustav at virtutech.com> + + * pthread_equal.c: Remove redundant equality logic. + +2003-12-10 Philippe Di Cristo <philipped at voicebox.com> + + * sem_timedwait.c (sem_timedwait): Fix timeout calculations. + +2003-10-20 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * pthread_mutex_timedlock.c (ptw32_semwait): Move to individual module. + * ptw32_semwait.c: New module. + * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Replace cancelable + sem_wait() call with non-cancelable ptw32_semwait() call. + * pthread.c (private.c): Re-order for inlining. GNU C warned that + function ptw32_semwait() was defined 'inline' after it was called. + * pthread_cond_signal.c (ptw32_cond_unblock): Likewise. + * pthread_delay_np.c: Disable Watcom warning with comment. + * *.c (process.h): Remove include from .c files. This is conditionally + included by the common project include files. + +2003-10-20 James Ewing <james.ewing at sveasoft.com> + + * ptw32_getprocessors.c: Some Win32 environments don't have + GetProcessAffinityMask(), so always return CPU count = 1 for them. + * config.h (NEED_PROCESSOR_AFFINITY_MASK): Define for WinCE. + +2003-10-15 Ross Johnson <ross at callisto.canberra.edu.au> + + * Re-indented all .c files using default GNU style to remove assorted + editor ugliness (used GNU indent utility in default style). + +2003-10-15 Alex Blanco <Alex.Blanco at motorola.com> + + * sem_init.c (sem_init): Would call CreateSemaphore even if the sema + struct calloc failed; was not freeing calloced memory if either + CreateSemaphore or CreateEvent failed. + +2003-10-14 Ross Johnson <ross at callisto.canberra.edu.au> + + * pthread.h: Add Watcom compiler compatibility. Esssentially just add + the cdecl attribute to all exposed function prototypes so that Watcom + generates function call code compatible with non-Watcom built libraries. + By default, Watcom uses registers to pass function args if possible rather + than pushing to stack. + * semaphore.h: Likewise. + * sched.h: Likewise. + * pthread_cond_wait.c (ptw32_cond_wait_cleanup): Define with cdecl attribute + for Watcom compatibility. This routine is called via pthread_cleanup_push so + it had to match function arg definition. + * Wmakefile: New makefile for Watcom builds. + +2003-09-14 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_setschedparam.c (pthread_setschedparam): Attempt to map + all priority levels between max and min (as returned by + sched_get_priority_min/max) to reasonable Win32 priority levels - i.e. + levels between THREAD_PRIORITY_LOWEST/IDLE to THREAD_PRIORITY_LOWEST and + between THREAD_PRIORITY_HIGHEST/TIME_CRITICAL to THREAD_PRIORITY_HIGHEST + while others remain unchanged; record specified thread priority level + for return by pthread_getschedparam. + + Note that, previously, specified levels not matching Win32 priority levels + would silently leave the current thread priority unaltered. + + * pthread_getschedparam.c (pthread_getschedparam): Return the priority + level specified by the latest pthread_setschedparam or pthread_create rather + than the actual running thread priority as returned by GetThreadPriority - as + required by POSIX. I.e. temporary or adjusted actual priority levels are not + returned by this routine. + + * pthread_create.c (pthread_create): For priority levels specified via + pthread attributes, attempt to map all priority levels between max and + min (as returned by sched_get_priority_min/max) to reasonable Win32 + priority levels; record priority level given via attributes, or + inherited from parent thread, for later return by pthread_getschedparam. + + * ptw32_new.c (ptw32_new): Initialise pthread_t_ sched_priority element. + + * pthread_self.c (pthread_self): Set newly created implicit POSIX thread + sched_priority to Win32 thread's current actual priority. Temporarily + altered priorities can't be avoided in this case. + + * implement.h (struct pthread_t_): Add new sched_priority element. + +2003-09-12 Ross Johnson <rpj at callisto.canberra.edu.au> + + * sched_get_priority_min.c (sched_get_priority_min): On error should return -1 + with errno set. + * sched_get_priority_max.c (sched_get_priority_max): Likewise. + +2003-09-03 Ross Johnson <rpj at callisto.canberra.edu.au> + + * w32_cancelableWait.c (ptw32_cancelable_wait): Allow cancelation + of implicit POSIX threads as well. + +2003-09-02 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_win32_attach_detach_np.c (pthread_win32_thread_detach_np): + Add comment. + + * pthread_exit.c (pthread_exit): Fix to recycle the POSIX thread handle in + addition to calling user TSD destructors. Move the implicit POSIX thread exit + handling to ptw32_throw to centralise the logic. + + * ptw32_throw.c (ptw32_throw): Implicit POSIX threads have no point + to jump or throw to, so cleanup and exit the thread here in this case. For + processes using the C runtime, the exit code will be set to the POSIX + reason for the throw (i.e. PTHREAD_CANCEL or the value given to pthread_exit). + Note that pthread_exit() already had similar logic, which has been moved to + here. + + * ptw32_threadDestroy.c (ptw32_threadDestroy): Don't close the Win32 handle + of implicit POSIX threads - expect this to be done by Win32? + +2003-09-01 Ross Johnson <rpj at callisto.canberra.edu.au> + + * pthread_self.c (pthread_self): The newly aquired pthread_t must be + assigned to the reuse stack, not freed, if the routine fails somehow. + +2003-08-13 Ross Johnson <rpj at ise.canberra.edu.au> + + * pthread_getschedparam.c (pthread_getschedparam): An invalid thread ID + parameter was returning an incorrect error value; now uses a more exhaustive + check for validity. + + * pthread_setschedparam.c (pthread_setschedparam): Likewise. + + * pthread_join.c (pthread_join): Now uses a more exhaustive + check for validity. + + * pthread_detach.c (pthread_detach): Likewise. + + * pthread_cancel.c (pthread_cancel): Likewise. + + * ptw32_threadDestroy.c (ptw32_threadDestroy): pthread_t structs are + never freed - push them onto a stack for reuse. + + * ptw32_new.c (ptw32_new): Check for reusable pthread_t before dynamically + allocating new memory for the struct. + + * pthread_kill.c (pthread_kill): New file; new routine; takes only a zero + signal arg so that applications can check the thread arg for validity; checks + that the underlying Win32 thread HANDLE is valid. + + * pthread.h (pthread_kill): Add prototype. + + * ptw32_reuse.c (ptw32_threadReusePop): New file; new routine; pop a + pthread_t off the reuse stack. pthread_t_ structs that have been destroyed, i.e. + have exited detached or have been joined, are cleaned up and put onto a reuse + stack. Consequently, thread IDs are no longer freed once calloced. The library + will attempt to get a struct off this stack before asking the system to alloc + new memory when creating threads. The stack is guarded by a global mutex. + (ptw32_threadReusePush): New routine; push a pthread_t onto the reuse stack. + + * implement.h (ptw32_threadReusePush): Add new prototype. + (ptw32_threadReusePop): Likewise. + (pthread_t): Add new element. + + * ptw32_processTerminate.c (ptw32_processTerminate): Delete the thread + reuse lock; free all thread ID structs on the thread reuse stack. + + * ptw32_processInitialize.c (ptw32_processInitialize): Initialise the + thread reuse lock. + +2003-07-19 Ross Johnson <rpj at ise.canberra.edu.au> + + * GNUmakefile: modified to work under MsysDTK environment. + * pthread_spin_lock.c (pthread_spin_lock): Check for NULL arg. + * pthread_spin_unlock.c (pthread_spin_unlock): Likewise. + * pthread_spin_trylock.c (pthread_spin_trylock): Likewise; + fix incorrect pointer value if lock is dynamically initialised by + this function. + * sem_init.c (sem_init): Initialise sem_t value to quell compiler warning. + * sem_destroy.c (sem_destroy): Likewise. + * ptw32_threadStart.c (non-MSVC code sections): Include <exception> rather + than old-style <new.h>; fix all std:: namespace entities such as + std::terminate_handler instances and associated methods. + * ptw32_callUserDestroyRoutines.c (non-MSVC code sections): Likewise. + +2003-06-24 Piet van Bruggen <pietvb at newbridges.nl> + + * pthread_spin_destroy.c (pthread_spin_destroy): Was not freeing the + spinlock struct. + +2003-06-22 Nicolas Barry <boozai at yahoo.com> + + * pthread_mutex_destroy.c (pthread_mutex_destroy): When called + with a recursive mutex that was locked by the current thread, the + function was failing with a success return code. + +2003-05-15 Steven Reddie <Steven.Reddie at ca.com> + + * pthread_win32_attach_detach_np.c (pthread_win32_process_detach_np): + NULLify ptw32_selfThreadKey after the thread is destroyed, otherwise + destructors calling pthreads routines might resurrect it again, creating + memory leaks. Call the underlying Win32 Tls routine directly rather than + pthread_setspecific(). + (pthread_win32_thread_detach_np): Likewise. + +2003-05-14 Viv <vcotirlea at hotmail.com> + + * pthread.dsp: Change /MT compile flag to /MD. + +2003-03-04 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Fix failure to + set ownership of mutex on second grab after abstime timeout. + - bug reported by Robert Strycek <strycek at posam.sk> + +2002-12-17 Thomas Pfaff <tpfaff at gmx.net> + + * pthread_mutex_lock.c (ptw32_semwait): New static routine to provide + a non-cancelable sem_wait() function. This is consistent with the + way that pthread_mutex_timedlock.c does it. + (pthread_mutex_lock): Use ptw32_semwait() instead of sem_wait(). + +2002-12-11 Thomas Pfaff <tpfaff at gmx.net> + + * pthread_mutex_trylock.c: Should return EBUSY rather than EDEADLK. + * pthread_mutex_destroy.c: Remove redundant ownership test (the + trylock call does this for us); do not destroy a recursively locked + mutex. + +2002-09-20 Michael Johnson <michaelj at maine.rr.com> + + * pthread_cond_destroy.c (pthread_cond_destroy): + When two different threads exist, and one is attempting to + destroy a condition variable while the other is attempting to + initialize a condition variable that was created with + PTHREAD_COND_INITIALIZER, a deadlock can occur. Shrink + the ptw32_cond_list_lock critical section to fix it. + +2002-07-31 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * ptw32_threadStart.c (ptw32_threadStart): Thread cancelLock + destruction moved to ptw32_threadDestroy(). + + * ptw32_threadDestroy.c (ptw32_threadDestroy): Destroy + the thread's cancelLock. Moved here from ptw32_threadStart.c + to cleanup implicit threads as well. + +2002-07-30 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * pthread_cond_wait.c (ptw32_cond_wait_cleanup): + Remove code designed to avoid/prevent spurious wakeup + problems. It is believed that the sem_timedwait() call + is consuming a CV signal that it shouldn't and this is + breaking the avoidance logic. + +2002-07-30 Ross Johnson <rpj at ise.canberra.edu.au> + + * sem_timedwait.c (sem_timedwait): Tighten checks for + unreasonable abstime values - that would result in + unexpected timeout values. + + * w32_CancelableWait.c (ptw32_cancelable_wait): + Tighten up return value checking and add comments. + + +2002-06-08 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * sem_getvalue.c (sem_getvalue): Now returns a value for the + NEED_SEM version (i.e. earlier versions of WinCE). + + +2002-06-04 Rob Fanner <rfanner at stonethree.com> + + * sem_getvalue.c (sem_getvalue): The Johnson M. Hart + approach didn't work - we are forced to take an + intrusive approach. We try to decrement the sema + and then immediately release it again to get the + value. There is a small probability that this may + block other threads, but only momentarily. + +2002-06-03 Ross Johnson <rpj at ise.canberra.edu.au> + + * sem_init.c (sem_init): Initialise Win32 semaphores + to _POSIX_SEM_VALUE_MAX (which this implementation + defines in pthread.h) so that sem_getvalue() can use + the trick described in the comments in sem_getvalue(). + * pthread.h (_POSIX_SEM_VALUE_MAX): Defined. + (_POSIX_SEM_NSEMS_MAX): Defined - not used but may be + useful for source code portability. + +2002-06-03 Rob Fanner <rfanner at stonethree.com> + + * sem_getvalue.c (sem_getvalue): Did not work on NT. + Use approach suggested by Johnson M. Hart in his book + "Win32 System Programming". + +2002-02-28 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * errno.c: Compiler directive was incorrectly including code. + * pthread.h: Conditionally added some #defines from config.h + needed when not building the library. e.g. NEED_ERRNO, NEED_SEM. + (PTW32_DLLPORT): Now only defined if _DLL defined. + (_errno): Compiler directive was incorrectly including prototype. + * sched.h: Conditionally added some #defines from config.h + needed when not building the library. + * semaphore.h: Replace an instance of NEED_SEM that should + have been NEED_ERRNO. This change currently has nil effect. + + * GNUmakefile: Correct some recent changes. + + * Makefile: Add rule to generate pre-processor output. + +2002-02-23 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * pthread_rwlock_timedrdlock.c: New - untested. + * pthread_rwlock_timedwrlock.c: New - untested. + + * Testsuite passed (except known MSVC++ problems) + + * pthread_cond_destroy.c: Expand the time change + critical section to solve deadlock problem. + + * pthread.c: Add all remaining C modules. + * pthread.h: Use dllexport/dllimport attributes on functions + to avoid using pthread.def. + * sched.h: Likewise. + * semaphore.h: Likewise. + * GNUmakefile: Add new targets for single translation + unit build to maximise inlining potential; generate + pthread.def automatically. + * Makefile: Likewise, but no longer uses pthread.def. + +2002-02-20 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * pthread_cond_destroy.c (pthread_cond_destroy): + Enter the time change critical section earlier. + +2002-02-17 Ross Johnson <rpj at setup1.ise.canberra.edu.au + + * Testsuite passed. + + * pthread_timechange_handler_np.c: New; following + a suggestion from Alexander Terekhov that CVs should + be broadcast so that they all re-evaluate their + condition variables and reset a new timeout if + required, whenever an application receives a + WM_TIMECHANGE message. This message indicates that + the system time has been changed. Therefore, CVs + waiting for a timeout set as an abs_time will possibly + not wake up at the expected time. Some applications + may not be tolerant of this. + * pthread_cond_init.c: Add CV to linked list. + * pthread_cond_destroy.c: Remove CV from linked list. + * global.c (ptw32_cond_list_head): New variable. + (ptw32_cond_list_tail): New variable. + (ptw32_cond_list_cs): New critical section. + * ptw32_processInitialize (ptw32_cond_list_cs): Initialize. + * ptw32_processTerminate (ptw32_cond_list_cs): Delete. + + + * Reduce executable size. + ----------------------- + When linking with the static library, only those + routines actually called, either directly or indirectly + should be included. + + [Gcc has the -ffunction-segments option to do this but MSVC + doesn't have this feature as far as I can determine. Other + compilers are undetermined as well. - rpj] + + * spin.c: Split file into function segments. + * ptw32_spinlock_check_need_init.c: Separated routine from spin.c. + * pthread_spin_init.c: Likewise. + * pthread_spin_destroy.c: Likewise. + * pthread_spin_lock.c: Likewise. + * pthread_spin_unlock.c: Likewise. + * pthread_spin_trylock.c: Likewise. + + * sync.c: Split file into function segments. + * pthread_detach.c: Separated routine from sync.c. + * pthread_join.c: Likewise. + + * tsd.c: Split file into function segments. + * pthread_key_create.c: Separated routine from tsd.c. + * pthread_key_delete.c: Likewise. + * pthread_setspecific.c: Likewise. + * pthread_getspecific.c: Likewise. + + * sched.c: Split file into function segments. + * pthread_attr_setschedpolicy.c: Separated routine from sched.c. + * pthread_attr_getschedpolicy.c: Likewise. + * pthread_attr_setschedparam.c: Likewise. + * pthread_attr_getschedparam.c: Likewise. + * pthread_attr_setinheritsched.c: Likewise. + * pthread_attr_getinheritsched.c: Likewise. + * pthread_setschedparam.c: Likewise. + * pthread_getschedparam.c: Likewise. + * sched_get_priority_max.c: Likewise. + * sched_get_priority_min.c: Likewise. + * sched_setscheduler.c: Likewise. + * sched_getscheduler.c: Likewise. + * sched_yield.c: Likewise. + + +2002-02-16 Ross Johnson <rpj at setup1.ise.canberra.edu.au + + Reduce executable size. + ----------------------- + When linking with the static library, only those + routines actually called, either directly or indirectly + should be included. + + [Gcc has the -ffunction-segments option to do this but MSVC + doesn't have this feature as far as I can determine. Other + compilers are undetermined as well. - rpj] + + * mutex.c: Split file into function segments. + * pthread_mutexattr_destroy.c: Separated routine from mutex.c + * pthread_mutexattr_getpshared.c: Likewise. + * pthread_mutexattr_gettype.c: Likewise. + * pthread_mutexattr_init.c: Likewise. + * pthread_mutexattr_setpshared.c: Likewise. + * pthread_mutexattr_settype.c: Likewise. + * ptw32_mutex_check_need_init.c: Likewise. + * pthread_mutex_destroy.c: Likewise. + * pthread_mutex_init.c: Likewise. + * pthread_mutex_lock.c: Likewise. + * pthread_mutex_timedlock.c: Likewise. + * pthread_mutex_trylock.c: Likewise. + * pthread_mutex_unlock.c: Likewise. + + * private.c: Split file into function segments. + * ptw32_InterlockedCompareExchange.c: Separated routine from private.c + * ptw32_callUserDestroyRoutines.c: Likewise. + * ptw32_getprocessors.c: Likewise. + * ptw32_processInitialize.c: Likewise. + * ptw32_processTerminate.c: Likewise. + * ptw32_threadDestroy.c: Likewise. + * ptw32_threadStart.c: Likewise. + * ptw32_throw.c: Likewise. + * ptw32_timespec.c: Likewise. + * ptw32_tkAssocCreate.c: Likewise. + * ptw32_tkAssocDestroy.c: Likewise. + + * rwlock.c: Split file into function segments. + * pthread_rwlockattr_destroy.c: Separated routine from rwlock.c + * pthread_rwlockattr_getpshared.c: Likewise. + * pthread_rwlockattr_init.c: Likewise. + * pthread_rwlockattr_setpshared.c: Likewise. + * ptw32_rwlock_check_need_init.c: Likewise. + * pthread_rwlock_destroy.c: Likewise. + * pthread_rwlock_init.c: Likewise. + * pthread_rwlock_rdlock.c: Likewise. + * pthread_rwlock_tryrdlock.c: Likewise. + * pthread_rwlock_trywrlock.c: Likewise. + * pthread_rwlock_unlock.c: Likewise. + * pthread_rwlock_wrlock.c: Likewise. + +2002-02-10 Ross Johnson <rpj at setup1.ise.canberra.edu.au + + Reduce executable size. + ----------------------- + When linking with the static library, only those + routines actually called, either directly or indirectly + should be included. + + [Gcc has the -ffunction-segments option to do this but MSVC + doesn't have this feature as far as I can determine. Other + compilers are undetermined as well. - rpj] + + * nonportable.c: Split file into function segments. + * np_delay.c: Separated routine from nonportable.c + * np_getw32threadhandle.c: Likewise. + * np_mutexattr_setkind.c: Likewise. + * np_mutexattr_getkind.c: Likewise. + * np_num_processors.c: Likewise. + * np_win32_attach_detach.c: Likewise. + + * misc.c: Split file into function segments. + * pthread_equal.c: Separated routine from nonportable.c. + * pthread_getconcurrency.c: Likewise. + * pthread_once.c: Likewise. + * pthread_self.c: Likewise. + * pthread_setconcurrency.c: Likewise. + * ptw32_calloc.c: Likewise. + * ptw32_new.c: Likewise. + * w32_CancelableWait.c: Likewise. + +2002-02-09 Ross Johnson <rpj at setup1.ise.canberra.edu.au + + Reduce executable size. + ----------------------- + When linking with the static library, only those + routines actually called, either directly or indirectly + should be included. + + [Gcc has the -ffunction-segments option to do this but MSVC + doesn't have this feature as far as I can determine. Other + compilers are undetermined as well. - rpj] + + * condvar.c: Split file into function segments. + * pthread_condattr_destroy.c: Separated routine from condvar.c. + * pthread_condattr_getpshared.c: Likewise. + * pthread_condattr_init.c: Likewise. + * pthread_condattr_setpshared.c: Likewise. + * ptw32_cond_check_need_init.c: Likewise. + * pthread_cond_destroy.c: Likewise. + * pthread_cond_init.c: Likewise. + * pthread_cond_signal.c: Likewise. + * pthread_cond_wait.c: Likewise. + +2002-02-07 Alexander Terekhov<TEREKHOV at de.ibm.com> + + * nonportable.c (pthread_delay_np): Make a true + cancelation point. Deferred cancels will interrupt the + wait. + +2002-02-07 Ross Johnson <rpj at setup1.ise.canberra.edu.au + + * misc.c (ptw32_new): Add creation of cancelEvent so that + implicit POSIX threads (Win32 threads with a POSIX face) + are cancelable; mainly so that pthread_delay_np doesn't fail + if called from the main thread. + * create.c (pthread_create): Remove creation of cancelEvent + from here; now in ptw32_new(). + + Reduce executable size. + ----------------------- + When linking with the static library, only those + routines actually called, either directly or indirectly + should be included. + + [Gcc has the -ffunction-segments option to do this but MSVC + doesn't have this feature as far as I can determine. Other + compilers are undetermined as well. - rpj] + + * barrier.c: All routines are now in separate compilation units; + This file is used to congregate the separate modules for + potential inline optimisation and backward build compatibility. + * cancel.c: Likewise. + * pthread_barrierattr_destroy.c: Separated routine from cancel.c. + * pthread_barrierattr_getpshared.c: Likewise. + * pthread_barrierattr_init.c: Likewise. + * pthread_barrierattr_setpshared.c: Likewise. + * pthread_barrier_destroy.c: Likewise. + * pthread_barrier_init.c: Likewise. + * pthread_barrier_wait.c: Likewise. + * pthread_cancel.c: Likewise. + * pthread_setcancelstate.c: Likewise. + * pthread_setcanceltype.c: Likewise. + * pthread_testcancel.c: Likewise. + +2002-02-04 Max Woodbury <mtew at cds.duke.edu> + + Reduced name space pollution. + ----------------------------- + When the appropriate symbols are defined, the headers + will restrict the definitions of new names. In particular, + it must be possible to NOT include the <windows.h> + header and related definitions with some combination + of symbol definitions. Secondly, it should be possible + that additional definitions should be limited to POSIX + compliant symbols by the definition of appropriate symbols. + + * pthread.h: POSIX conditionals. + * sched.h: POSIX conditionals. + * semaphore.h: POSIX conditionals. + + * semaphore.c: Included <limits.h>. + (sem_init): Changed magic 0x7FFFFFFFL to INT_MAX. + (sem_getvalue): Trial version. + + Reduce executable size. + ----------------------- + When linking with the static library, only those + routines actually called, either directly or indirectly + should be included. + + [Gcc has the -ffunction-segments option to do this but MSVC + doesn't have this feature as far as I can determine. Other + compilers are undetermined as well. - rpj] + + * semaphore.c: All routines are now in separate compilation units; + This file is used to congregate the separate modules for + potential inline optimisation and backward build compatibility. + * sem_close.c: Separated routine from semaphore.c. + * ptw32_decrease_semaphore.c: Likewise. + * sem_destroy.c: Likewise. + * sem_getvalue.c: Likewise. + * ptw32_increase_semaphore.c: Likewise. + * sem_init.c: Likewise. + * sem_open.c: Likewise. + * sem_post.c: Likewise. + * sem_post_multiple.c: Likewise. + * sem_timedwait.c: Likewise. + * sem_trywait.c: Likewise. + * sem_unlink.c: Likewise. + * sem_wait.c: Likewise. + +2002-02-04 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + The following extends the idea above to the rest of pthreads-win32 - rpj + + * attr.c: All routines are now in separate compilation units; + This file is used to congregate the separate modules for + potential inline optimisation and backward build compatibility. + * pthread_attr_destroy.c: Separated routine from attr.c. + * pthread_attr_getdetachstate.c: Likewise. + * pthread_attr_getscope.c: Likewise. + * pthread_attr_getstackaddr.c: Likewise. + * pthread_attr_getstacksize.c: Likewise. + * pthread_attr_init.c: Likewise. + * pthread_attr_is_attr.c: Likewise. + * pthread_attr_setdetachstate.c: Likewise. + * pthread_attr_setscope.c: Likewise. + * pthread_attr_setstackaddr.c: Likewise. + * pthread_attr_setstacksize.c: Likewise. + + * pthread.c: Agregation of agregate modules for super-inlineability. + +2002-02-02 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * cancel.c: Rearranged some code and introduced checks + to disable cancelation at the start of a thread's cancelation + run to prevent double cancelation. The main problem + arises if a thread is canceling and then receives a subsequent + async cancel request. + * private.c: Likewise. + * condvar.c: Place pragmas around cleanup_push/pop to turn + off inline optimisation (/Obn where n>0 - MSVC only). Various + optimisation switches in MSVC turn this on, which interferes with + the way that cleanup handlers are run in C++ EH and SEH + code. Application code compiled with inline optimisation must + also wrap cleanup_push/pop blocks with the pragmas, e.g. + #pragma inline_depth(0) + pthread_cleanup_push(...) + ... + pthread_cleanup_pop(...) + #pragma inline_depth(8) + * rwlock.c: Likewise. + * mutex.c: Remove attempts to inline some functions. + * signal.c: Modify misleading comment. + +2002-02-01 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * semaphore.c (sem_trywait): Fix missing errno return + for systems that define NEED_SEM (e.g. early WinCE). + * mutex.c (pthread_mutex_timedlock): Return ENOTSUP + for systems that define NEED_SEM since they don't + have sem_trywait(). + +2002-01-27 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * mutex.c (pthread_mutex_timedlock): New function suggested by + Alexander Terekhov. The logic required to implement this + properly came from Alexander, with some collaboration + with Thomas Pfaff. + (pthread_mutex_unlock): Wrap the waiters check and sema + post in a critical section to prevent a race with + pthread_mutex_timedlock. + (ptw32_timed_semwait): New function; + returns a special result if the absolute timeout parameter + represents a time already passed when called; used by + pthread_mutex_timedwait(). Have deliberately not reused + the name "ptw32_sem_timedwait" because they are not the same + routine. + * condvar.c (ptw32_cond_timedwait): Use the new sem_timedwait() + instead of ptw32_sem_timedwait(), which now has a different + function. See previous. + * implement.h: Remove prototype for ptw32_sem_timedwait. + See next. + (pthread_mutex_t_): Add critical section element for access + to lock_idx during mutex post-timeout processing. + * semaphore.h (sem_timedwait): See next. + * semaphore.c (sem_timedwait): See next. + * private.c (ptw32_sem_timedwait): Move to semaphore.c + and rename as sem_timedwait(). + +2002-01-18 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * sync.c (pthread_join): Was getting the exit code from the + calling thread rather than the joined thread if + defined(__MINGW32__) && !defined(__MSVCRT__). + +2002-01-15 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.h: Unless the build explicitly defines __CLEANUP_SEH, + __CLEANUP_CXX, or __CLEANUP_C, then the build defaults to + __CLEANUP_C style cleanup. This style uses setjmp/longjmp + in the cancelation and thread exit implementations and therefore + won't do stack unwinding if linked to applications that have it + (e.g. C++ apps). This is currently consistent with most/all + commercial Unix POSIX threads implementations. + + * spin.c (pthread_spin_init): Edit renamed function call. + * nonportable.c (pthread_num_processors_np): New. + (pthread_getprocessors_np): Renamed to ptw32_getprocessors + and moved to private.c. + * private.c (pthread_getprocessors): Moved here from + nonportable.c. + * pthread.def (pthread_getprocessors_np): Removed + from export list. + + * rwlock.c (pthread_rwlockattr_init): New. + (pthread_rwlockattr_destroy): New. + (pthread_rwlockattr_getpshared): New. + (pthread_rwlockattr_setpshared): New. + +2002-01-14 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * attr.c (pthread_attr_setscope): Fix struct pointer + indirection error introduced 2002-01-04. + (pthread_attr_getscope): Likewise. + +2002-01-12 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.dsp (SOURCE): Add missing source files. + +2002-01-08 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * mutex.c (pthread_mutex_trylock): use + ptw32_interlocked_compare_exchange function pointer + rather than ptw32_InterlockedCompareExchange() directly + to retain portability to non-iX86 processors, + e.g. WinCE etc. The pointer will point to the native + OS version of InterlockedCompareExchange() if the + OS supports it (see ChangeLog entry of 2001-10-17). + +2002-01-07 Thomas Pfaff <tpfaff at gmx.net>, Alexander Terekhov <TEREKHOV at de.ibm.com> + + * mutex.c (pthread_mutex_init): Remove critical + section calls. + (pthread_mutex_destroy): Likewise. + (pthread_mutex_unlock): Likewise. + (pthread_mutex_trylock): Likewise; uses + ptw32_InterlockedCompareExchange() to avoid need for + critical section; library is no longer i386 compatible; + recursive mutexes now increment the lock count rather + than return EBUSY; errorcheck mutexes return EDEADLCK + rather than EBUSY. This behaviour is consistent with the + Solaris pthreads implementation. + * implement.h (pthread_mutex_t_): Remove critical + section element - no longer needed. + + +2002-01-04 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * attr.c (pthread_attr_setscope): Add more error + checking and actually store the scope value even + though it's not really necessary. + (pthread_attr_getscope): Return stored value. + * implement.h (pthread_attr_t_): Add new scope element. + * ANNOUNCE: Fix out of date comment next to + pthread_attr_setscope in conformance section. + +2001-12-21 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * mutex.c (pthread_mutex_lock): Decrementing lock_idx was + not thread-safe. + (pthread_mutex_trylock): Likewise. + +2001-10-26 prionx@juno.com + + * semaphore.c (sem_init): Fix typo and missing bracket + in conditionally compiled code. Only older versions of + WinCE require this code, hence it doesn't normally get + tested; somehow when sem_t reverted to an opaque struct + the calloc NULL check was left in the conditionally included + section. + (sem_destroy): Likewise, the calloced sem_t wasn't being freed. + +2001-10-25 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * GNUmakefile (libwsock32): Add to linker flags for + WSAGetLastError() and WSASetLastError(). + * Makefile (wsock32.lib): Likewise. + * create.c: Minor mostly inert changes. + * implement.h (PTW32_MAX): Move into here and renamed + from sched.h. + (PTW32_MIN): Likewise. + * GNUmakefile (TEST_ICE): Define if testing internal + implementation of InterlockedCompareExchange. + * Makefile (TEST_ICE): Likewise. + * private.c (TEST_ICE): Likewise. + +2001-10-24 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * attr.c (pthread_attr_setstacksize): Quell warning + from LCC by conditionally compiling the stacksize + validity check. LCC correctly warns that the condition + (stacksize < PTHREAD_STACK_MIN) is suspicious + because STACK_MIN is 0 and stacksize is of type + size_t (or unsigned int). + +2001-10-17 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * barrier.c: Move _LONG and _LPLONG defines into + implement.h; rename to PTW32_INTERLOCKED_LONG and + PTW32_INTERLOCKED_LPLONG respectively. + * spin.c: Likewise; ptw32_interlocked_compare_exchange used + in place of InterlockedCompareExchange directly. + * global.c (ptw32_interlocked_compare_exchange): Add + prototype for this new routine pointer to be used when + InterlockedCompareExchange isn't supported by Windows. + * nonportable.c (pthread_win32_process_attach_np): Check for + support of InterlockedCompareExchange in kernel32 and assign its + address to ptw32_interlocked_compare_exchange if it exists, or + our own ix86 specific implementation ptw32_InterlockedCompareExchange. + *private.c (ptw32_InterlockedCompareExchange): An + implementation of InterlockedCompareExchange() which is + specific to ix86; written directly in assembler for either + MSVC or GNU C; needed because Windows 95 doesn't support + InterlockedCompareExchange(). + + * sched.c (sched_get_priority_min): Extend to return + THREAD_PRIORITY_IDLE. + (sched_get_priority_max): Extend to return + THREAD_PRIORITY_CRITICAL. + +2001-10-15 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * spin.c (pthread_spin_lock): PTHREAD_SPINLOCK_INITIALIZER + was causing a program fault. + (pthread_spin_init): Could have alloced memory + without freeing under some error conditions. + + * mutex.c (pthread_mutex_init): Move memory + allocation of mutex struct after checking for + PROCESS_SHARED. + +2001-10-12 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * spin.c (pthread_spin_unlock): Was not returning + EPERM if the spinlock was not locked, for multi CPU + machines. + +2001-10-08 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * spin.c (pthread_spin_trylock): Was not returning + EBUSY for multi CPU machines. + +2001-08-24 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * condvar.c (pthread_cond_destroy): Remove cv element + that is no longer used. + * implement.h: Likewise. + +2001-08-23 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * condvar.c (pthread_cond_destroy): fix bug with + respect to deadlock in the case of concurrent + _destroy/_unblock; a condition variable can be destroyed + immediately after all the threads that are blocked on + it are awakened. + +2001-08-23 Phil Frisbie, Jr. <phil at hawksoft.com> + + * tsd.c (pthread_getspecific): Preserve the last + winsock error [from WSAGetLastError()]. + +2001-07-18 Scott McCaskill <scott at magruder.org> + + * mutex.c (pthread_mutexattr_init): Return ENOMEM + immediately and don't dereference the NULL pointer + if calloc fails. + (pthread_mutexattr_getpshared): Don't dereference + a pointer that is possibly NULL. + * barrier.c (pthread_barrierattr_init): Likewise + (pthread_barrierattr_getpshared): Don't dereference + a pointer that is possibly NULL. + * condvar.c (pthread_condattr_getpshared): Don't dereference + a pointer that is possibly NULL. + +2001-07-15 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * rwlock.c (pthread_rwlock_wrlock): Is allowed to be + a cancelation point; re-enable deferred cancelability + around the CV call. + +2001-07-10 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * barrier.c: Still more revamping. The exclusive access + mutex isn't really needed so it has been removed and replaced + by an InterlockedDecrement(). nSerial has been removed. + iStep is now dual-purpose. The process shared attribute + is now stored in the barrier struct. + * implement.h (pthread_barrier_t_): Lost some/gained one + elements. + * private.c (ptw32_threadStart): Removed some comments. + +2001-07-10 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * barrier.c: Revamped to fix the race condition. Two alternating + semaphores are used instead of the PulseEvent. Also improved + overall throughput by returning PTHREAD_BARRIER_SERIAL_THREAD + to the first waking thread. + * implement.h (pthread_barrier_t_): Revamped. + +2001-07-09 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * barrier.c: Fix several bugs in all routines. Now passes + tests/barrier5.c which is fairly rigorous. There is still + a non-optimal work-around for a race condition between + the barrier breeched event signal and event wait. Basically + the last (signalling) thread to hit the barrier yields + to allow any other threads, which may have lost the race, + to complete. + +2001-07-07 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * barrier.c: Changed synchronisation mechanism to a + Win32 manual reset Event and use PulseEvent to signal + waiting threads. If the implementation continued to use + a semaphore it would require a second semaphore and + some management to use them alternately as barriers. A + single semaphore allows threads to cascade from one barrier + through the next, leaving some threads blocked at the first. + * implement.h (pthread_barrier_t_): As per above. + * general: Made a number of other routines inlinable. + +2001-07-07 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * spin.c: Revamped and working; included static initialiser. + Now beta level. + * barrier.c: Likewise. + * condvar.c: Macro constant change; inline auto init routine. + * mutex.c: Likewise. + * rwlock.c: Likewise. + * private.c: Add support for spinlock initialiser. + * global.c: Likewise. + * implement.h: Likewise. + * pthread.h (PTHREAD_SPINLOCK_INITIALIZER): Fix typo. + +2001-07-05 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * barrier.c: Remove static initialisation - irrelevent + for this object. + * pthread.h (PTHREAD_BARRIER_INITIALIZER): Removed. + * rwlock.c (pthread_rwlock_wrlock): This routine is + not a cancelation point - disable deferred + cancelation around call to pthread_cond_wait(). + +2001-07-05 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * spin.c: New module implementing spin locks. + * barrier.c: New module implementing barriers. + * pthread.h (_POSIX_SPIN_LOCKS): defined. + (_POSIX_BARRIERS): Defined. + (pthread_spin_*): Defined. + (pthread_barrier*): Defined. + (PTHREAD_BARRIER_SERIAL_THREAD): Defined. + * implement.h (pthread_spinlock_t_): Defined. + (pthread_barrier_t_): Defined. + (pthread_barrierattr_t_): Defined. + + * mutex.c (pthread_mutex_lock): Return with the error + if an auto-initialiser initialisation fails. + + * nonportable.c (pthread_getprocessors_np): New; gets the + number of available processors for the current process. + +2001-07-03 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * pthread.h (_POSIX_READER_WRITER_LOCKS): Define it + if not already defined. + +2001-07-01 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * condvar.c: Fixed lost signal bug reported by Timur Aydin + (taydin@snet.net). + [RPJ (me) didn't translate the original algorithm + correctly.] + * semaphore.c: Added sem_post_multiple; this is a useful + routine, but it doesn't appear to be standard. For now it's + not an exported function. + +2001-06-25 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * create.c (pthread_create): Add priority inheritance + attributes. + * mutex.c (pthread_mutex_lock): Remove some overhead for + PTHREAD_MUTEX_NORMAL mutex types. Specifically, avoid + calling pthread_self() and pthread_equal() to check/set + the mutex owner. Introduce a new pseudo owner for this + type. Test results suggest increases in speed of up to + 90% for non-blocking locks. + This is the default type of mutex used internally by other + synchronising objects, ie. condition variables and + read-write locks. The test rwlock7.c shows about a + 30-35% speed increase over snapshot 2001-06-06. The + price of this is that the application developer + must ensure correct behaviour, or explicitly set the + mutex to a safer type such as PTHREAD_MUTEX_ERRORCHECK. + For example, PTHREAD_MUTEX_NORMAL (or PTHREAD_MUTEX_DEFAULT) + type mutexes will not return an error if a thread which is not + the owner calls pthread_mutex_unlock. The call will succeed + in unlocking the mutex if it is currently locked, but a + subsequent unlock by the true owner will then fail with EPERM. + This is however consistent with some other implementations. + (pthread_mutex_unlock): Likewise. + (pthread_mutex_trylock): Likewise. + (pthread_mutex_destroy): Likewise. + * attr.c (pthread_attr_init): PTHREAD_EXPLICIT_SCHED is the + default inheritance attribute; THREAD_PRIORITY_NORMAL is + the default priority for new threads. + * sched.c (pthread_attr_setschedpolicy): Added routine. + (pthread_attr_getschedpolicy): Added routine. + (pthread_attr_setinheritsched): Added routine. + (pthread_attr_getinheritsched): Added routine. + * pthread.h (sched_rr_set_interval): Added as a macro; + returns -1 with errno set to ENOSYS. + +2001-06-23 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + *sched.c (pthread_attr_setschedparam): Add priority range + check. + (sched_setscheduler): New function; checks for a valid + pid and policy; checks for permission to set information + in the target process; expects pid to be a Win32 process ID, + not a process handle; the only scheduler policy allowed is + SCHED_OTHER. + (sched_getscheduler): Likewise, but checks for permission + to query. + * pthread.h (SCHED_*): Moved to sched.h as defined in the + POSIX standard. + * sched.h (SCHED_*): Moved from pthread.h. + (pid_t): Defined if necessary. + (sched_setscheduler): Defined. + (sched_getscheduler): Defined. + * pthread.def (sched_setscheduler): Exported. + (sched_getscheduler): Likewise. + +2001-06-23 Ralf Brese <Ralf.Brese at pdb4.siemens.de> + + * create.c (pthread_create): Set thread priority from + thread attributes. + +2001-06-18 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * Made organisational-only changes to UWIN additions. + * dll.c (dllMain): Moved UWIN process attach code + to pthread_win32_process_attach_np(); moved + instance of pthread_count to global.c. + * global.c (pthread_count): Moved from dll.c. + * nonportable.c (pthread_win32_process_attach_np): + Moved _UWIN code to here from dll.c. + * implement.h (pthread_count): Define extern int. + * create.c (pthread_count): Remove extern int. + * private.c (pthread_count): Likewise. + * exit.c (pthread_count): Likewise. + +2001-06-18 David Korn <dgk at research.att.com> + + * dll.c: Added changes necessary to work with UWIN. + * create.c: Likewise. + * pthread.h: Likewise. + * misc.c: Likewise. + * exit.c: Likewise. + * private.c: Likewise. + * implement.h: Likewise. + There is some room at the start of struct pthread_t_ + to implement the signal semantics in UWIN's posix.dll + although this is not yet complete. + * Nmakefile: Compatible with UWIN's Nmake utility. + * Nmakefile.tests: Likewise - for running the tests. + +2001-06-08 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * semaphore.h (sem_t): Fixed for compile and test. + * implement.h (sem_t_): Likewise. + * semaphore.c: Likewise. + * private.c (ptw32_sem_timedwait): Updated to use new + opaque sem_t. + +2001-06-06 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * semaphore.h (sem_t): Is now an opaque pointer; + moved actual definition to implement.h. + * implement.h (sem_t_): Move here from semaphore.h; + was the definition of sem_t. + * semaphore.c: Wherever necessary, changed use of sem + from that of a pointer to a pointer-pointer; added + extra checks for a valid sem_t; NULL sem_t when + it is destroyed; added extra checks when creating + and destroying sem_t elements in the NEED_SEM + code branches; changed from using a pthread_mutex_t + ((*sem)->mutex) to CRITICAL_SECTION ((*sem)->sem_lock_cs) + in NEED_SEM branches for access serialisation. + +2001-06-06 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * mutex.c (pthread_mutexattr_init): Remove + ptw32_mutex_default_kind. + +2001-06-05 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * nonportable.c (pthread_mutex_setdefaultkind_np): + Remove - should not have been included in the first place. + (pthread_mutex_getdefaultkind_np): Likewise. + * global.c (ptw32_mutex_default_kind): Likewise. + * mutex.c (pthread_mutex_init): Remove use of + ptw32_mutex_default_kind. + * pthread.h (pthread_mutex_setdefaultkind_np): Likewise. + (pthread_mutex_getdefaultkind_np): Likewise. + * pthread.def (pthread_mutexattr_setkind_np): Added. + (pthread_mutexattr_getkind_np): Likewise. + + * README: Many changes that should have gone in before + the last snapshot. + * README.NONPORTABLE: New - referred to by ANNOUNCE + but never created; documents the non-portable routines + included in the library - moved from README with new + routines added. + * ANNOUNCE (pthread_mutexattr_setkind_np): Added to + compliance list. + (pthread_mutexattr_getkind_np): Likewise. + +2001-06-04 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * condvar.c: Add original description of the algorithm as + developed by Terekhov and Thomas, plus reference to + README.CV. + +2001-06-03 Alexander Terekhov <TEREKHOV at de.ibm.com>, Louis Thomas <lthomas at arbitrade.com> + + * condvar.c (pthread_cond_init): Completely revamped. + (pthread_cond_destroy): Likewise. + (ptw32_cond_wait_cleanup): Likewise. + (ptw32_cond_timedwait): Likewise. + (ptw32_cond_unblock): New general signaling routine. + (pthread_cond_signal): Now calls ptw32_cond_unblock. + (pthread_cond_broadcast): Likewise. + * implement.h (pthread_cond_t_): Revamped. + * README.CV: New; explanation of the above changes. + +2001-05-30 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * pthread.h (rand_r): Fake using _seed argument to quell + compiler warning (compiler should optimise this away later). + + * GNUmakefile (OPT): Leave symbolic information out of the library + and increase optimisation level - for smaller faster prebuilt + dlls. + +2001-05-29 Milan Gardian <Milan.Gardian at LEIBINGER.com> + + * Makefile: fix typo. + * pthreads.h: Fix problems with stdcall/cdecl conventions, in particular + remove the need for PT_STDCALL everywhere; remove warning supression. + * (errno): Fix the longstanding "inconsistent dll linkage" problem + with errno; now also works with /MD debugging libs - + warnings emerged when compiling pthreads library with /MD (or /MDd) + compiler switch, instead of /MT (or /MTd) (i.e. when compiling pthreads + using Multithreaded DLL CRT instead of Multithreaded statically linked + CRT). + * create.c (pthread_create): Likewise; fix typo. + * private.c (ptw32_threadStart): Eliminate use of terminate() which doesn't + throw exceptions. + * Remove unnecessary #includes from a number of modules - + [I had to #include malloc.h in implement.h for gcc - rpj]. + +2001-05-29 Thomas Pfaff <tpfaff at gmx.net> + + * pthread.h (PTHREAD_MUTEX_DEFAULT): New; equivalent to + PTHREAD_MUTEX_DEFAULT_NP. + * (PTHREAD_MUTEX_NORMAL): Similarly. + * (PTHREAD_MUTEX_ERRORCHECK): Similarly. + * (PTHREAD_MUTEX_RECURSIVE): Similarly. + * (pthread_mutex_setdefaultkind_np): New; Linux compatibility stub + for pthread_mutexattr_settype. + * (pthread_mutexattr_getkind_np): New; Linux compatibility stub + for pthread_mutexattr_gettype. + * mutex.c (pthread_mutexattr_settype): New; allow + the following types of mutex: + PTHREAD_MUTEX_DEFAULT_NP + PTHREAD_MUTEX_NORMAL_NP + PTHREAD_MUTEX_ERRORCHECK_NP + PTHREAD_MUTEX_RECURSIVE_NP + * Note that PTHREAD_MUTEX_DEFAULT is equivalent to + PTHREAD_MUTEX_NORMAL - ie. mutexes should no longer + be recursive by default, and a thread will deadlock if it + tries to relock a mutex it already owns. This is inline with + other pthreads implementations. + * (pthread_mutex_lock): Process the lock request + according to the mutex type. + * (pthread_mutex_init): Eliminate use of Win32 mutexes as the + basis of POSIX mutexes - instead, a combination of one critical section + and one semaphore are used in conjunction with Win32 Interlocked* routines. + * (pthread_mutex_destroy): Likewise. + * (pthread_mutex_lock): Likewise. + * (pthread_mutex_trylock): Likewise. + * (pthread_mutex_unlock): Likewise. + * Use longjmp/setjmp to implement cancelation when building the library + using a C compiler which doesn't support exceptions, e.g. gcc -x c (note + that gcc -x c++ uses exceptions). + * Also fixed some of the same typos and eliminated PT_STDCALL as + Milan Gardian's patches above. + +2001-02-07 Alexander Terekhov <TEREKHOV at de.ibm.com> + + * rwlock.c: Revamped. + * implement.h (pthread_rwlock_t_): Redefined. + This implementation does not have reader/writer starvation problem. + Rwlock attempts to behave more like a normal mutex with + races and scheduling policy determining who is more important; + It also supports recursive locking, + has less synchronization overhead (no broadcasts at all, + readers are not blocked on any condition variable) and seem to + be faster than the current implementation [W98 appears to be + approximately 15 percent faster at least - on top of speed increase + from Thomas Pfaff's changes to mutex.c - rpj]. + +2000-12-29 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * Makefile: Back-out "for" loops which don't work. + + * GNUmakefile: Remove the fake.a target; add the "realclean" + target; don't remove built libs under the "clean" target. + + * config.h: Add a guard against multiple inclusion. + + * semaphore.h: Add some defines from config.h to make + semaphore.h independent of config.h when building apps. + + * pthread.h (_errno): Back-out previous fix until we know how to + fix it properly. + + * implement.h (lockCount): Add missing element to pthread_mutex_t_. + + * sync.c (pthread_join): Spelling fix in comment. + + * private.c (ptw32_threadStart): Reset original termination + function (C++). + (ptw32_threadStart): Cleanup detached threads early in case + the library is statically linked. + (ptw32_callUserDestroyRoutines): Remove [SEH] __try block from + destructor call so that unhandled exceptions will be passed through + to the system; call terminate() from [C++] try block for the same + reason. + + * tsd.c (pthread_getspecific): Add comment. + + * mutex.c (pthread_mutex_init): Initialise new elements in + pthread_mutex_t. + (pthread_mutex_unlock): Invert "pthread_equal()" test. + +2000-12-28 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * semaphore.c (mode_t): Use ifndef HAVE_MODE_T to include definition. + + * config.h.in (HAVE_MODE_T): Added. + (_UWIN): Start adding defines for the UWIN package. + + * private.c (ptw32_threadStart): Unhandled exceptions are + now passed through to the system to deal with. This is consistent + with normal Windows behaviour. C++ applications may use + set_terminate() to override the default behaviour which is + to call ptw32_terminate(). Ptw32_terminate() cleans up some + POSIX thread stuff before calling the system default function + which calls abort(). The users termination function should conform + to standard C++ semantics which is to not return. It should + exit the thread (call pthread_exit()) or exit the application. + * private.c (ptw32_terminate): Added as the default set_terminate() + function. It calls the system default function after cleaning up + some POSIX thread stuff. + + * implement.h (ptw32_try_enter_critical_section): Move + declaration. + * global.c (ptw32_try_enter_critical_section): Moved + from dll.c. + * dll.c: Move process and thread attach/detach code into + functions in nonportable.c. + * nonportable.c (pthread_win32_process_attach_np): Process + attach code from dll.c is now available to static linked + applications. + * nonportable.c (pthread_win32_process_detach_np): Likewise. + * nonportable.c (pthread_win32_thread_attach_np): Likewise. + * nonportable.c (pthread_win32_thread_detach_np): Likewise. + + * pthread.h: Add new non-portable prototypes for static + linked applications. + + * GNUmakefile (OPT): Increase optimisation flag and remove + debug info flag. + + * pthread.def: Add new non-portable exports for static + linked applications. + +2000-12-11 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * FAQ: Update Answer 6 re getting a fully working + Mingw32 built library. + +2000-10-10 Steven Reddie <smr at essemer.com.au> + + * misc.c (pthread_self): Restore Win32 "last error" + cleared by TlsGetValue() call in + pthread_getspecific() + +2000-09-20 Arthur Kantor <akantor at bexusa.com> + + * mutex.c (pthread_mutex_lock): Record the owner + of the mutex. This requires also keeping count of + recursive locks ourselves rather than leaving it + to Win32 since we need to know when to NULL the + thread owner when the mutex is unlocked. + (pthread_mutex_trylock): Likewise. + (pthread_mutex_unlock): Check that the calling + thread owns the mutex, decrement the recursive + lock count, and NULL the owner if zero. Return + EPERM if the mutex is owned by another thread. + * implement.h (pthread_mutex_t_): Add ownerThread + and lockCount members. + +2000-09-13 Jef Gearhart <jgearhart at tpssys.com> + + * mutex.c (pthread_mutex_init): Call + TryEnterCriticalSection through the pointer + rather than directly so that the dll can load + on Windows versions that can't resolve the + function, eg. Windows 95 + +2000-09-09 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.h (ctime_r): Fix arg. + +2000-09-08 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * GNUmakefile(_WIN32_WINNT=0x400): Define in CFLAGS; + doesn't seem to be needed though. + + * cancel.c (pthread_cancel): Must get "self" through + calling pthread_self() which will ensure a POSIX thread + struct is built for non-POSIX threads; return an error + if this fails + - Ollie Leahy <ollie at mpt.ie> + (pthread_setcancelstate): Likewise. + (pthread_setcanceltype): Likewise. + * misc.c (ptw32_cancelable_wait): Likewise. + + * private.c (ptw32_tkAssocCreate): Remove unused #if 0 + wrapped code. + + * pthread.h (ptw32_get_exception_services_code): + Needed to be forward declared unconditionally. + +2000-09-06 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * cancel.c (pthread_cancel): If called from the main + thread "self" would be NULL; get "self" via pthread_self() + instead of directly from TLS so that an implicit + pthread object is created. + + * misc.c (pthread_equal): Strengthen test for NULLs. + +2000-09-02 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * condvar.c (ptw32_cond_wait_cleanup): Ensure that all + waking threads check if they are the last, and notify + the broadcaster if so - even if an error occurs in the + waiter. + + * semaphore.c (_decrease_semaphore): Should be + a call to ptw32_decrease_semaphore. + (_increase_semaphore): Should be a call to + ptw32_increase_semaphore. + + * misc.c (ptw32_cancelable_wait): Renamed from + CancelableWait. + * rwlock.c (_rwlock_check*): Renamed to + ptw32_rwlock_check*. + * mutex.c (_mutex_check*): Renamed to ptw32_mutex_check*. + * condvar.c (cond_timed*): Renamed to ptw32_cond_timed*. + (_cond_check*): Renamed to ptw32_cond_check*. + (cond_wait_cleanup*): Rename to ptw32_cond_wait_cleanup*. + (ptw32_cond_timedwait): Add comments. + +2000-08-22 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * private.c (ptw32_throw): Fix exception test; + move exceptionInformation declaration. + + * tsd.c (pthread_key_create): newkey wrongly declared. + + * pthread.h: Fix comment block. + +2000-08-18 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * mutex.c (pthread_mutex_destroy): Check that the mutex isn't + held; invalidate the mutex as early as possible to avoid + contention; not perfect - FIXME! + + * rwlock.c (pthread_rwlock_init): Remove redundant assignment + to "rw". + (pthread_rwlock_destroy): Invalidate the rwlock before + freeing up any of it's resources - to avoid contention. + + * private.c (ptw32_tkAssocCreate): Change assoc->lock + to use a dynamically initialised mutex - only consumes + a W32 mutex or critical section when first used, + not before. + + * mutex.c (pthread_mutex_init): Remove redundant assignment + to "mx". + (pthread_mutexattr_destroy): Set attribute to NULL + before freeing it's memory - to avoid contention. + + * implement.h (PTW32_EPS_CANCEL/PTW32_EPS_EXIT): + Must be defined for all compilers - used as generic + exception selectors by ptw32_throw(). + + * Several: Fix typos from scripted edit session + yesterday. + + * nonportable.c (pthread_mutexattr_setforcecs_np): + Moved this function from mutex.c. + (pthread_getw32threadhandle_np): New function to + return the win32 thread handle that the POSIX + thread is using. + * mutex.c (pthread_mutexattr_setforcecs_np): + Moved to new file "nonportable.c". + + * pthread.h (PTW32_BUILD): Only redefine __except + and catch compiler keywords if we aren't building + the library (ie. PTW32_BUILD is not defined) - + this is safer than defining and then undefining + if not building the library. + * implement.h: Remove __except and catch undefines. + * Makefile (CFLAGS): Define PTW32_BUILD. + * GNUmakefile (CFLAGS): Define PTW32_BUILD. + + * All appropriate: Change Pthread_exception* to + ptw32_exception* to be consistent with internal + identifier naming. + + * private.c (ptw32_throw): New function to provide + a generic exception throw for all internal + exceptions and EH schemes. + (ptw32_threadStart): pthread_exit() value is now + returned via the thread structure exitStatus + element. + * exit.c (pthread_exit): pthread_exit() value is now + returned via the thread structure exitStatus + element. + * cancel.c (ptw32_cancel_self): Now uses ptw32_throw. + (pthread_setcancelstate): Ditto. + (pthread_setcanceltype): Ditto. + (pthread_testcancel): Ditto. + (pthread_cancel): Ditto. + * misc.c (CancelableWait): Ditto. + * exit.c (pthread_exit): Ditto. + * All applicable: Change PTW32_ prefix to + PTW32_ prefix to remove leading underscores + from private library identifiers. + +2000-08-17 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * All applicable: Change _pthread_ prefix to + ptw32_ prefix to remove leading underscores + from private library identifiers (single + and double leading underscores are reserved in the + ANSI C standard for compiler implementations). + + * tsd.c (pthread_create_key): Initialise temporary + key before returning it's address to avoid race + conditions. + +2000-08-13 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * errno.c: Add _MD precompile condition; thus far + had no effect when using /MD compile option but I + thnk it should be there. + + * exit.c: Add __cplusplus to various #if lines; + was compiling SEH code even when VC++ had + C++ compile options. + + * private.c: ditto. + + * create.c (pthread_create): Add PT_STDCALL macro to + function pointer arg in _beginthread(). + + * pthread.h: PT_STDCALL really does need to be defined + in both this and impliment.h; don't set it to __cdecl + - this macro is only used to extend function pointer + casting for functions that will be passed as parameters. + (~PThreadCleanup): add cast and group expression. + (_errno): Add _MD compile conditional. + (PtW32NoCatchWarn): Change pragma message. + + * implement.h: Move and change PT_STDCALL define. + + * need_errno.h: Add _MD to compilation conditional. + + * GNUmakefile: Substantial rewrite for new naming + convention; set for nil optimisation (turn it up + when we have a working library build; add target + "fake.a" to build a libpthreadw32.a from the VC++ + built DLL pthreadVCE.dll. + + * pthread.def (LIBRARY): Don't specify in the .def + file - it is specified on the linker command line + since we now use the same .def file for variously + named .dlls. + + * Makefile: Substantial rewrite for new naming + convention; default nmake target only issues a + help message; run nmake with specific target + corresponding to the EH scheme being used. + + * README: Update information; add naming convention + explanation. + + * ANNOUNCE: Update information. + +2000-08-12 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.h: Add compile-time message when using + MSC_VER compiler and C++ EH to warn application + programmers to use PtW32Catch instead of catch(...) + if they want cancelation and pthread_exit to work. + + * implement.h: Remove #include <semaphore.h>; we + use our own local semaphore.h. + +2000-08-10 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * cleanup.c (pthread_pop_cleanup): Remove _pthread + prefix from __except and catch keywords; implement.h + now simply undefines ptw32__except and + ptw32_catch if defined; VC++ was not textually + substituting ptw32_catch etc back to catch as + it was redefined; the reason for using the prefixed + version was to make it clear that it was not using + the pthread.h redefined catch keyword. + + * private.c (ptw32_threadStart): Ditto. + (ptw32_callUserDestroyRoutines): Ditto. + + * implement.h (ptw32__except): Remove #define. + (ptw32_catch): Remove #define. + + * GNUmakefile (pthread.a): New target to build + libpthread32.a from pthread.dll using dlltool. + + * buildlib.bat: Duplicate cl commands with args to + build C++ EH version of pthread.dll; use of .bat + files is redundant now that nmake compatible + Makefile is included; used as a kludge only now. + + * Makefile: Localise some macros and fix up the clean: + target to extend it and work properly. + + * CONTRIBUTORS: Add contributors. + + * ANNOUNCE: Updated. + + * README: Updated. + +2000-08-06 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.h: Remove #warning - VC++ doesn't accept it. + +2000-08-05 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.h (PtW32CatchAll): Add macro. When compiling + applications using VC++ with C++ EH rather than SEH + 'PtW32CatchAll' must be used in place of any 'catch( ... )' + if the application wants pthread cancelation or + pthread_exit() to work. + +2000-08-03 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * pthread.h: Add a base class ptw32_exception for + library internal exceptions and change the "catch" + re-define macro to use it. + +2000-08-02 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * GNUmakefile (CFLAGS): Add -mthreads. + Add new targets to generate cpp and asm output. + + * sync.c (pthread_join): Remove dead code. + +2000-07-25 Tristan Savatier <tristan at mpegtv.com> + + * sched.c (sched_get_priority_max): Handle different WinCE and + Win32 priority values together. + (sched_get_priority_min): Ditto. + +2000-07-25 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * create.c (pthread_create): Force new threads to wait until + pthread_create has the new thread's handle; we also retain + a local copy of the handle for internal use until + pthread_create returns. + + * private.c (ptw32_threadStart): Initialise ei[]. + (ptw32_threadStart): When beginthread is used to start the + thread, force waiting until the creator thread had the + thread handle. + + * cancel.c (ptw32_cancel_thread): Include context switch + code for defined(_X86_) environments in addition to _M_IX86. + + * rwlock.c (pthread_rwlock_destroy): Assignment changed + to avoid compiler warning. + + * private.c (ptw32_get_exception_services_code): Cast + NULL return value to avoid compiler warning. + + * cleanup.c (pthread_pop_cleanup): Initialise "cleanup" variable + to avoid compiler warnings. + + * misc.c (ptw32_new): Change "new" variable to "t" to avoid + confusion with the C++ keyword of the same name. + + * condvar.c (cond_wait_cleanup): Initialise lastWaiter variable. + (cond_timedwait): Remove unused local variables. to avoid + compiler warnings. + + * dll.c (dllMain): Remove 2000-07-21 change - problem + appears to be in pthread_create(). + +2000-07-22 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * tsd.c (pthread_key_create): If a destructor was given + and the pthread_mutex_init failed, then would try to + reference a NULL pointer (*key); eliminate this section of + code by using a dynamically initialised mutex + (PTHREAD_MUTEX_INITIALIZER). + + * tsd.c (pthread_setspecific): Return an error if + unable to set the value; simplify cryptic conditional. + + * tsd.c (pthread_key_delete): Locking threadsLock relied + on mutex_lock returning an error if the key has no destructor. + ThreadsLock is only initialised if the key has a destructor. + Making this mutex a static could reduce the number of mutexes + used by an application since it is actually created only at + first use and it's often destroyed soon after. + +2000-07-22 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * FAQ: Added Q5 and Q6. + +2000-07-21 David Baggett <dmb at itasoftware.com> + + * dll.c: Include resource leakage work-around. This is a + partial FIXME which doesn't stop all leakage. The real + problem needs to be found and fixed. + +2000-07-21 Ross Johnson <rpj at setup1.ise.canberra.edu.au> + + * create.c (pthread_create): Set threadH to 0 (zero) + everywhere. Some assignments were using NULL. Maybe + it should be NULL everywhere - need to check. (I know + they are nearly always the same thing - but not by + definition.) + + * misc.c (pthread_self): Try to catch NULL thread handles + at the point where they might be generated, even though + they should always be valid at this point. + + * tsd.c (pthread_setspecific): return an error value if + pthread_self() returns NULL. + + * sync.c (pthread_join): return an error value if + pthread_self() returns NULL. + + * signal.c (pthread_sigmask): return an error value if + pthread_self() returns NULL. + +2000-03-02 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * attr.c (pthread_attr_init): Set default stacksize to zero (0) + rather than PTHREAD_STACK_MIN even though these are now the same. + + * pthread.h (PTHREAD_STACK_MIN): Lowered to 0. + +2000-01-28 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * mutex.c (pthread_mutex_init): Free mutex if it has been alloced; + if critical sections can be used instead of Win32 mutexes, test + that the critical section works and return an error if not. + +2000-01-07 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * cleanup.c (pthread_pop_cleanup): Include SEH code only if MSC is not + compiling as C++. + (pthread_push_cleanup): Include SEH code only if MSC is not + compiling as C++. + + * pthread.h: Include SEH code only if MSC is not + compiling as C++. + + * implement.h: Include SEH code only if MSC is not + compiling as C++. + + * cancel.c (ptw32_cancel_thread): Add _M_IX86 check. + (pthread_testcancel): Include SEH code only if MSC is not + compiling as C++. + (ptw32_cancel_self): Include SEH code only if MSC is not + compiling as C++. + +2000-01-06 Erik Hensema <erik.hensema at group2000.nl> + + * Makefile: Remove inconsistencies in 'cl' args + +2000-01-04 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * private.c (ptw32_get_exception_services_code): New; returns + value of EXCEPTION_PTW32_SERVICES. + (ptw32_processInitialize): Remove initialisation of + ptw32_exception_services which is no longer needed. + + * pthread.h (ptw32_exception_services): Remove extern. + (ptw32_get_exception_services_code): Add function prototype; + use this to return EXCEPTION_PTW32_SERVICES value instead of + using the ptw32_exception_services variable which I had + trouble exporting through pthread.def. + + * global.c (ptw32_exception_services): Remove declaration. + +1999-11-22 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * implement.h: Forward declare ptw32_new(); + + * misc.c (ptw32_new): New; alloc and initialise a new pthread_t. + (pthread_self): New thread struct is generated by new routine + ptw32_new(). + + * create.c (pthread_create): New thread struct is generated + by new routine ptw32_new(). + +1999-11-21 Ross Johnson <rpj at special.ise.canberra.edu.au> + + * global.c (ptw32_exception_services): Declare new variable. + + * private.c (ptw32_threadStart): Destroy thread's + cancelLock mutex; make 'catch' and '__except' usageimmune to + redfinitions in pthread.h. + (ptw32_processInitialize): Init new constant ptw32_exception_services. + + * create.c (pthread_create): Initialise thread's cancelLock + mutex. + + * cleanup.c (pthread_pop_cleanup): Make 'catch' and '__except' + usage immune to redfinition s in pthread.h. + + * private.c: Ditto. + + * pthread.h (catch): Redefine 'catch' so that C++ applications + won't catch our internal exceptions. + (__except): ditto for __except. + + * implement.h (ptw32_catch): Define internal version + of 'catch' because 'catch' is redefined by pthread.h. + (__except): ditto for __except. + (struct pthread_t_): Add cancelLock mutex for async cancel + safety. + +1999-11-21 Jason Nye <jnye at nbnet.nb.ca>, Erik Hensema <erik.hensema at group2000.nl> + + * cancel.c (ptw32_cancel_self): New; part of the async + cancellation implementation. + (ptw32_cancel_thread): Ditto; this function is X86 + processor specific. + (pthread_setcancelstate): Add check for pending async + cancel request and cancel the calling thread if + required; add async-cancel safety lock. + (pthread_setcanceltype): Ditto. + +1999-11-13 Erik Hensema <erik.hensema at group2000.nl> + + * configure.in (AC_OUTPUT): Put generated output into GNUmakefile + rather than Makefile. Makefile will become the MSC nmake compatible + version + +1999-11-13 John Bossom (John.Bossom@cognos.com> + + * misc.c (pthread_self): Add a note about GetCurrentThread + returning a pseudo-handle + +1999-11-10 Todd Owen <towen at lucidcalm.dropbear.id.au> + + * dll.c (dllMain): Free kernel32 ASAP. + If TryEnterCriticalSection is not being used, then free + the kernel32.dll handle now, rather than leaving it until + DLL_PROCESS_DETACH. + + Note: this is not a pedantic exercise in freeing unused + resources! It is a work-around for a bug in Windows 95 + (see microsoft knowledge base article, Q187684) which + does Bad Things when FreeLibrary is called within + the DLL_PROCESS_DETACH code, in certain situations. + Since w95 just happens to be a platform which does not + provide TryEnterCriticalSection, the bug will be + effortlessly avoided. + +1999-11-10 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sync.c (pthread_join): Make it a deferred cancelation point. + + * misc.c (pthread_self): Explicitly initialise implicitly + created thread state to default values. + +1999-11-05 Tristan Savatier <tristan at mpegtv.com> + + * pthread.h (winsock.h): Include unconditionally. + (ETIMEDOUT): Change fallback value to that defined by winsock.h. + + * general: Patched for portability to WinCE. The details are + described in the file WinCE-PORT. Follow the instructions + in README.WinCE to make the appropriate changes in config.h. + +1999-10-30 Erik Hensema <erik.hensema at group2000.nl> + + * create.c (pthread_create): Explicitly initialise thread state to + default values. + + * cancel.c (pthread_setcancelstate): Check for NULL 'oldstate' + for compatibility with Solaris pthreads; + (pthread_setcanceltype): ditto: + +1999-10-23 Erik Hensema <erik.hensema at group2000.nl> + + * pthread.h (ctime_r): Fix incorrect argument "_tm" + +1999-10-21 Aurelio Medina <aureliom at crt.com> + + * pthread.h (_POSIX_THREADS): Only define it if it isn't + already defined. Projects may need to define this on + the CC command line under Win32 as it doesn't have unistd.h + +1999-10-17 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * rwlock.c (pthread_rwlock_destroy): Add cast to remove compile + warning. + + * condvar.c (pthread_cond_broadcast): Only release semaphores + if there are waiting threads. + +1999-10-15 Lorin Hochstein <lmh at xiphos.ca>, Peter Slacik <Peter.Slacik at tatramed.sk> + + * condvar.c (cond_wait_cleanup): New static cleanup handler for + cond_timedwait; + (cond_timedwait): pthread_cleanup_push args changed; + canceling a thread while it's in pthread_cond_wait + will now decrement the waiters count and cleanup if it's the + last waiter. + +1999-10-15 Graham Dumpleton <Graham.Dumpleton at ra.pad.otc.telstra.com.au> + + * condvar.c (cond_wait_cleanup): the last waiter will now reset the CV's + wasBroadcast flag + +Thu Sep 16 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * rwlock.c (pthread_rwlock_destroy): Add serialisation. + (_rwlock_check_need_init): Check for detroyed rwlock. + * rwlock.c: Check return codes from _rwlock_check_need_init(); + modify comments; serialise access to rwlock objects during + operations; rename rw_mutex to rw_lock. + * implement.h: Rename rw_mutex to rw_lock. + * mutex.c (pthread_mutex_destroy): Add serialisation. + (_mutex_check_need_init): Check for detroyed mutex. + * condvar.c (pthread_cond_destroy): Add serialisation. + (_cond_check_need_init): Check for detroyed condvar. + * mutex.c: Modify comments. + * condvar.c: Modify comments. + +1999-08-10 Aurelio Medina <aureliom at crt.com> + + * implement.h (pthread_rwlock_t_): Add. + * pthread.h (pthread_rwlock_t): Add. + (PTHREAD_RWLOCK_INITIALIZER): Add. + Add rwlock function prototypes. + * rwlock.c: New module. + * pthread.def: Add new rwlock functions. + * private.c (ptw32_processInitialize): initialise + ptw32_rwlock_test_init_lock critical section. + * global.c (ptw32_rwlock_test_init_lock): Add. + + * mutex.c (pthread_mutex_destroy): Don't free mutex memory + if mutex is PTHREAD_MUTEX_INITIALIZER and has not been + initialised yet. + +1999-08-08 Milan Gardian <mg at tatramed.sk> + + * mutex.c (pthread_mutex_destroy): Free mutex memory. + +1999-08-22 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * exit.c (pthread_exit): Fix reference to potentially + uninitialised pointer. + +1999-08-21 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_threadStart): Apply fix of 1999-08-19 + this time to C++ and non-trapped C versions. Ommitted to + do this the first time through. + +1999-08-19 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_threadStart): Return exit status from + the application thread startup routine. + - Milan Gardian <mg at tatramed.sk> + +1999-08-18 John Bossom <john.Bossom at cognos.com> + + * exit.c (pthread_exit): Put status into pthread_t->exitStatus + * private.c (ptw32_threadStart): Set pthread->exitStatus + on exit of try{} block. + * sync.c (pthread_join): use pthread_exitStatus value if the + thread exit doesn't return a value (for Mingw32 CRTDLL + which uses endthread instead of _endthreadex). + +Tue Aug 17 20:17:58 CDT 1999 Mumit Khan <khan at xraylith.wisc.edu> + + * create.c (pthread_create): Add CRTDLL suppport. + * exit.c (pthread_exit): Likewise. + * private.c (ptw32_threadStart): Likewise. + (ptw32_threadDestroy): Likewise. + * sync.c (pthread_join): Likewise. + * tests/join1.c (main): Warn about partial support for CRTDLL. + +Tue Aug 17 20:00:08 1999 Mumit Khan <khan at xraylith.wisc.edu> + + * Makefile.in (LD): Delete entry point. + * acconfig.h (STDCALL): Delete unused macro. + * configure.in: Remove test for STDCALL. + * config.h.in: Regenerate. + * errno.c (_errno): Fix self type. + * pthread.h (PT_STDCALL): Move from here to + * implement.h (PT_STDCALL): here. + (ptw32_threadStart): Fix prototype. + * private.c (ptw32_threadStart): Likewise. + +1999-08-14 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * exit.c (pthread_exit): Don't call pthread_self() but + get thread handle directly from TSD for efficiency. + +1999-08-12 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_threadStart): ei[] only declared if _MSC_VER. + + * exit.c (pthread_exit): Check for implicitly created threads + to avoid raising an unhandled exception. + +1999-07-12 Peter Slacik <Peter.Slacik at tatramed.sk> + + * condvar.c (pthread_cond_destroy): Add critical section. + (cond_timedwait): Add critical section; check for timeout + waiting on semaphore. + (pthread_cond_broadcast): Add critical section. + +1999-07-09 Lorin Hochstein <lmh at xiphos.ca>, John Bossom <John.Bossom at Cognos.COM> + + The problem was that cleanup handlers were not executed when + pthread_exit() was called. + + * implement.h (pthread_t_): Add exceptionInformation element for + C++ per-thread exception information. + (general): Define and rename exceptions. + +1999-07-09 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * misc.c (CancelableWait): PTW32_EPS_CANCEL (SEH) and + ptw32_exception_cancel (C++) used to identify the exception. + + * cancel.c (pthread_testcancel): PTW32_EPS_CANCEL (SEH) and + ptw32_exception_cancel (C++) used to identify the exception. + + * exit.c (pthread_exit): throw/raise an exception to return to + ptw32_threadStart() to exit the thread. PTW32_EPS_EXIT (SEH) + and ptw32_exception_exit (C++) used to identify the exception. + + * private.c (ptw32_threadStart): Add pthread_exit exception trap; + clean up and exit the thread directly rather than via pthread_exit(). + +Sun May 30 00:25:02 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * semaphore.h (mode_t): Conditionally typedef it. + +Fri May 28 13:33:05 1999 Mark E. Armstrong <avail at pacbell.net> + + * condvar.c (pthread_cond_broadcast): Fix possible memory fault + +Thu May 27 13:08:46 1999 Peter Slacik <Peter.Slacik at tatramed.sk> + + * condvar.c (pthread_cond_broadcast): Fix logic bug + +Thu May 27 13:08:46 1999 Bossom, John <John.Bossom at Cognos.COM> + + * condvar.c (pthread_cond_broadcast): optimise sem_post loop + +Fri May 14 12:13:18 1999 Mike Russo <miker at eai.com> + + * attr.c (pthread_attr_setdetachstate): Fix logic bug + +Sat May 8 09:42:30 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.def (sem_open): Add. + (sem_close): Add. + (sem_unlink): Add. + (sem_getvalue): Add. + + * FAQ (Question 3): Add. + +Thu Apr 8 01:16:23 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * semaphore.c (sem_open): New function; returns an error (ENOSYS). + (sem_close): ditto. + (sem_unlink): ditto. + (sem_getvalue): ditto. + + * semaphore.h (_POSIX_SEMAPHORES): define. + +Wed Apr 7 14:09:52 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * errno.c (_REENTRANT || _MT): Invert condition. + + * pthread.h (_errno): Conditionally include prototype. + +Wed Apr 7 09:37:00 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * *.c (comments): Remove individual attributions - these are + documented sufficiently elsewhere. + + * implement.h (pthread.h): Remove extraneous include. + +Sun Apr 4 11:05:57 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sched.c (sched.h): Include. + + * sched.h: New file for POSIX 1b scheduling. + + * pthread.h: Move opaque structures to implement.h; move sched_* + prototypes out and into sched.h. + + * implement.h: Add opaque structures from pthread.h. + + * sched.c (sched_yield): New function. + + * condvar.c (ptw32_sem_*): Rename to sem_*; except for + ptw32_sem_timedwait which is an private function. + +Sat Apr 3 23:28:00 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * Makefile.in (OBJS): Add errno.o. + +Fri Apr 2 11:08:50 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h (ptw32_sem_*): Remove prototypes now defined in + semaphore.h. + + * pthread.h (sempahore.h): Include. + + * semaphore.h: New file for POSIX 1b semaphores. + + * semaphore.c (ptw32_sem_timedwait): Moved to private.c. + + * pthread.h (ptw32_sem_t): Change to sem_t. + + * private.c (ptw32_sem_timedwait): Moved from semaphore.c; + set errno on error. + + * pthread.h (pthread_t_): Add per-thread errno element. + +Fri Apr 2 11:08:50 1999 John Bossom <jebossom at cognos.com> + + * semaphore.c (ptw32_sem_*): Change to sem_*; these functions + will be exported from the library; set errno on error. + + * errno.c (_errno): New file. New function. + +Fri Mar 26 14:11:45 1999 Tor Lillqvist <tml at iki.fi> + + * semaphore.c (ptw32_sem_timedwait): Check for negative + milliseconds. + +Wed Mar 24 11:32:07 1999 John Bossom <jebossom at cognos.com> + + * misc.c (CancelableWait): Initialise exceptionInformation[2]. + (pthread_self): Get a real Win32 thread handle for implicit threads. + + * cancel.c (pthread_testcancel): Initialise exceptionInformation[2]. + + * implement.h (SE_INFORMATION): Fix values. + + * private.c (ptw32_threadDestroy): Close the thread handle. + +Fri Mar 19 12:57:27 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * cancel.c (comments): Update and cleanup. + +Fri Mar 19 09:12:59 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_threadStart): status returns PTHREAD_CANCELED. + + * pthread.h (PTHREAD_CANCELED): defined. + +Tue Mar 16 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * all: Add GNU LGPL and Copyright and Warranty. + +Mon Mar 15 00:20:13 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * condvar.c (pthread_cond_init): fix possible uninitialised use + of cv. + +Sun Mar 14 21:01:59 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * condvar.c (pthread_cond_destroy): don't do full cleanup if + static initialised cv has never been used. + (cond_timedwait): check result of auto-initialisation. + +Thu Mar 11 09:01:48 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (pthread_mutex_t): revert to (pthread_mutex_t *); + define a value to serve as PTHREAD_MUTEX_INITIALIZER. + (pthread_mutex_t_): remove staticinit and valid elements. + (pthread_cond_t): revert to (pthread_cond_t_ *); + define a value to serve as PTHREAD_COND_INITIALIZER. + (pthread_cond_t_): remove staticinit and valid elements. + + * mutex.c (pthread_mutex_t args): adjust indirection of references. + (all functions): check for PTHREAD_MUTEX_INITIALIZER value; + check for NULL (invalid). + + * condvar.c (pthread_cond_t args): adjust indirection of references. + (all functions): check for PTHREAD_COND_INITIALIZER value; + check for NULL (invalid). + +Wed Mar 10 17:18:12 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * misc.c (CancelableWait): Undo changes from Mar 8 and 7. + +Mon Mar 8 11:18:59 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * misc.c (CancelableWait): Ensure cancelEvent handle is the lowest + indexed element in the handles array. Enhance test for abandoned + objects. + + * pthread.h (PTHREAD_MUTEX_INITIALIZER): Trailing elements not + initialised are set to zero by the compiler. This avoids the + problem of initialising the opaque critical section element in it. + (PTHREAD_COND_INITIALIZER): Ditto. + + * semaphore.c (ptw32_sem_timedwait): Check sem == NULL earlier. + +Sun Mar 7 12:31:14 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * condvar.c (pthread_cond_init): set semaphore initial value + to 0, not 1. cond_timedwait was returning signaled immediately. + + * misc.c (CancelableWait): Place the cancel event handle first + in the handle table for WaitForMultipleObjects. This ensures that + the cancel event is recognised and acted apon if both objects + happen to be signaled together. + + * private.c (ptw32_cond_test_init_lock): Initialise and destroy. + + * implement.h (ptw32_cond_test_init_lock): Add extern. + + * global.c (ptw32_cond_test_init_lock): Add declaration. + + * condvar.c (pthread_cond_destroy): check for valid initialised CV; + flag destroyed CVs as invalid. + (pthread_cond_init): pthread_cond_t is no longer just a pointer. + This is because PTHREAD_COND_INITIALIZER needs state info to reside + in pthread_cond_t so that it can initialise on first use. Will work on + making pthread_cond_t (and other objects like it) opaque again, if + possible, later. + (cond_timedwait): add check for statically initialisation of + CV; initialise on first use. + (pthread_cond_signal): check for valid CV. + (pthread_cond_broadcast): check for valid CV. + (_cond_check_need_init): Add. + + * pthread.h (PTHREAD_COND_INITIALIZER): Fix. + (pthread_cond_t): no longer a pointer to pthread_cond_t_. + (pthread_cond_t_): add 'staticinit' and 'valid' elements. + +Sat Mar 6 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Undate comments. + +Sun Feb 21 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (PTHREAD_MUTEX_INITIALIZER): missing braces around + cs element initialiser. + +1999-02-21 Ben Elliston <bje at cygnus.com> + + * pthread.h (pthread_exit): The return type of this function is + void, not int. + + * exit.c (pthread_exit): Do not return 0. + +Sat Feb 20 16:03:30 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * dll.c (DLLMain): Expand TryEnterCriticalSection support test. + + * mutex.c (pthread_mutex_trylock): The check for + ptw32_try_enter_critical_section == NULL should have been + removed long ago. + +Fri Feb 19 16:03:30 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sync.c (pthread_join): Fix pthread_equal() test. + + * mutex.c (pthread_mutex_trylock): Check mutex != NULL before + using it. + +Thu Feb 18 16:17:30 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * misc.c (pthread_equal): Fix inverted result. + + * Makefile.in: Use libpthread32.a as the name of the DLL export + library instead of pthread.lib. + + * condvar.c (pthread_cond_init): cv could have been used unitialised; + initialise. + + * create.c (pthread_create): parms could have been used unitialised; + initialise. + + * pthread.h (struct pthread_once_t_): Remove redefinition. + +Sat Feb 13 03:03:30 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (struct pthread_once_t_): Replaced. + + * misc.c (pthread_once): Replace with John Bossom's version; + has lighter weight serialisation; fixes problem of not holding + competing threads until after the init_routine completes. + +Thu Feb 11 13:34:14 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * misc.c (CancelableWait): Change C++ exception throw. + + * sync.c (pthread_join): Change FIXME comment - issue resolved. + +Wed Feb 10 12:49:11 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * configure: Various temporary changes. + - Kevin Ruland <Kevin.Ruland at anheuser-busch.com> + + * README: Update. + + * pthread.def (pthread_attr_getstackaddr): uncomment + (pthread_attr_setstackaddr): uncomment + +Fri Feb 5 13:42:30 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * semaphore.c: Comment format changes. + +Thu Feb 4 10:07:28 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * global.c: Remove ptw32_exception instantiation. + + * cancel.c (pthread_testcancel): Change C++ exception throw. + + * implement.h: Remove extern declaration. + +Wed Feb 3 13:04:44 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * cleanup.c: Rename ptw32_*_cleanup() to pthread_*_cleanup(). + + * pthread.def: Ditto. + + * pthread.h: Ditto. + + * pthread.def (pthread_cleanup_push): Remove from export list; + the function is defined as a macro under all compilers. + (pthread_cleanup_pop): Ditto. + + * pthread.h: Remove #if defined(). + +Wed Feb 3 10:13:48 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sync.c (pthread_join): Check for NULL value_ptr arg; + check for detached threads. + +Tue Feb 2 18:07:43 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * implement.h: Add #include <pthread.h>. + Change sem_t to ptw32_sem_t. + +Tue Feb 2 18:07:43 1999 Kevin Ruland <Kevin.Ruland at anheuser-busch.com> + + * signal.c (pthread_sigmask): Add and modify casts. + Reverse LHS/RHS bitwise assignments. + + * pthread.h: Remove #include <semaphore.h>. + (PTW32_ATTR_VALID): Add cast. + (struct pthread_t_): Add sigmask element. + + * dll.c: Add "extern C" for DLLMain. + (DllMain): Add cast. + + * create.c (pthread_create): Set sigmask in thread. + + * condvar.c: Remove #include. Change sem_* to ptw32_sem_*. + + * attr.c: Changed #include. + + * Makefile.in: Additional targets and changes to build the library + as a DLL. + +Fri Jan 29 11:56:28 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * Makefile.in (OBJS): Add semaphore.o to list. + + * semaphore.c (ptw32_sem_timedwait): Move from private.c. + Rename sem_* to ptw32_sem_*. + + * pthread.h (pthread_cond_t): Change type of sem_t. + _POSIX_SEMAPHORES no longer defined. + + * semaphore.h: Contents moved to implement.h. + Removed from source tree. + + * implement.h: Add semaphore function prototypes and rename all + functions to prepend 'ptw32_'. They are + now private to the pthreads-win32 implementation. + + * private.c: Change #warning. + Move ptw32_sem_timedwait() to semaphore.c. + + * cleanup.c: Change #warning. + + * misc.c: Remove #include <errno.h> + + * pthread.def: Cleanup CVS merge conflicts. + + * global.c: Ditto. + + * ChangeLog: Ditto. + + * cleanup.c: Ditto. + +Sun Jan 24 01:34:52 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * semaphore.c (sem_wait): Remove second arg to + pthreadCancelableWait() call. + +Sat Jan 23 17:36:40 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.def: Add new functions to export list. + + * pthread.h (PTHREAD_MUTEX_AUTO_CS_NP): New. + (PTHREAD_MUTEX_FORCE_CS_NP): New. + + * README: Updated. + +Fri Jan 22 14:31:59 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * Makefile.in (CFLAGS): Remove -fhandle-exceptions. Not needed + with egcs. Add -g for debugging. + + * create.c (pthread_create): Replace __stdcall with PT_STDCALL + macro. This is a hack and must be fixed. + + * misc.c (CancelableWait): Remove redundant statement. + + * mutex.c (pthread_mutexattr_init): Cast calloc return value. + + * misc.c (CancelableWait): Add cast. + (pthread_self): Add cast. + + * exit.c (pthread_exit): Add cast. + + * condvar.c (pthread_condattr_init): Cast calloc return value. + + * cleanup.c: Reorganise conditional compilation. + + * attr.c (pthread_attr_init): Remove unused 'result'. + Cast malloc return value. + + * private.c (ptw32_callUserDestroyRoutines): Redo conditional + compilation. + + * misc.c (CancelableWait): C++ version uses 'throw'. + + * cancel.c (pthread_testcancel): Ditto. + + * implement.h (class ptw32_exception): Define for C++. + + * pthread.h: Fix C, C++, and Win32 SEH condition compilation + mayhem around pthread_cleanup_* defines. C++ version now uses John + Bossom's cleanup handlers. + (pthread_attr_t): Make 'valid' unsigned. + Define '_timeb' as 'timeb' for Ming32. + Define PT_STDCALL as nothing for Mingw32. May be temporary. + + * cancel.c (pthread_testcancel): Cast return value. + +Wed Jan 20 09:31:28 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (pthread_mutexattr_t): Changed to a pointer. + + * mutex.c (pthread_mutex_init): Conditionally create Win32 mutex + - from John Bossom's implementation. + (pthread_mutex_destroy): Conditionally close Win32 mutex + - from John Bossom's implementation. + (pthread_mutexattr_init): Replaced by John Bossom's version. + (pthread_mutexattr_destroy): Ditto. + (pthread_mutexattr_getpshared): New function from John Bossom's + implementation. + (pthread_mutexattr_setpshared): New function from John Bossom's + implementation. + +Tue Jan 19 18:27:42 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * pthread.h (pthreadCancelableTimedWait): New prototype. + (pthreadCancelableWait): Remove second argument. + + * misc.c (CancelableWait): New static function is + pthreadCancelableWait() renamed. + (pthreadCancelableWait): Now just calls CancelableWait() with + INFINITE timeout. + (pthreadCancelableTimedWait): Just calls CancelableWait() + with passed in timeout. + +Tue Jan 19 18:27:42 1999 Scott Lightner <scott at curriculum.com> + + * private.c (ptw32_sem_timedwait): 'abstime' arg really is + absolute time. Calculate relative time to wait from current + time before passing timeout to new routine + pthreadCancelableTimedWait(). + +Tue Jan 19 10:27:39 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (pthread_mutexattr_setforcecs_np): New prototype. + + * mutex.c (pthread_mutexattr_init): Init 'pshared' and 'forcecs' + attributes to 0. + (pthread_mutexattr_setforcecs_np): New function (not portable). + + * pthread.h (pthread_mutex_t): + Add 'mutex' element. Set to NULL in PTHREAD_MUTEX_INITIALIZER. + The pthread_mutex_*() routines will try to optimise performance + by choosing either mutexes or critical sections as the basis + for pthread mutexes for each indevidual mutex. + (pthread_mutexattr_t_): Add 'forcecs' element. + Some applications may choose to force use of critical sections + if they know that:- + the mutex is PROCESS_PRIVATE and, + either the OS supports TryEnterCriticalSection() or + pthread_mutex_trylock() will never be called on the mutex. + This attribute will be setable via a non-portable routine. + + Note: We don't yet support PROCESS_SHARED mutexes, so the + implementation as it stands will default to Win32 mutexes only if + the OS doesn't support TryEnterCriticalSection. On Win9x, and early + versions of NT 'forcecs' will need to be set in order to get + critical section based mutexes. + +Sun Jan 17 12:01:26 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (PTHREAD_MUTEX_INITIALIZER): Init new 'staticinit' + value to '1' and existing 'valid' value to '1'. + + * global.c (ptw32_mutex_test_init_lock): Add. + + * implement.h (ptw32_mutex_test_init_lock.): Add extern. + + * private.c (ptw32_processInitialize): Init critical section for + global lock used by _mutex_check_need_init(). + (ptw32_processTerminate): Ditto (:s/Init/Destroy/). + + * dll.c (dllMain): Move call to FreeLibrary() so that it is only + called once when the process detaches. + + * mutex.c (_mutex_check_need_init): New static function to test + and init PTHREAD_MUTEX_INITIALIZER mutexes. Provides serialised + access to the internal state of the uninitialised static mutex. + Called from pthread_mutex_trylock() and pthread_mutex_lock() which + do a quick unguarded test to check if _mutex_check_need_init() + needs to be called. This is safe as the test is conservative + and is repeated inside the guarded section of + _mutex_check_need_init(). Thus in all calls except the first + calls to lock static mutexes, the additional overhead to lock any + mutex is a single memory fetch and test for zero. + + * pthread.h (pthread_mutex_t_): Add 'staticinit' member. Mutexes + initialised by PTHREAD_MUTEX_INITIALIZER aren't really initialised + until the first attempt to lock it. Using the 'valid' + flag (which flags the mutex as destroyed or not) to record this + information would be messy. It is possible for a statically + initialised mutex such as this to be destroyed before ever being + used. + + * mutex.c (pthread_mutex_trylock): Call _mutex_check_need_init() + to test/init PTHREAD_MUTEX_INITIALIZER mutexes. + (pthread_mutex_lock): Ditto. + (pthread_mutex_unlock): Add check to ensure we don't try to unlock + an unitialised static mutex. + (pthread_mutex_destroy): Add check to ensure we don't try to delete + a critical section that we never created. Allows us to destroy + a static mutex that has never been locked (and hence initialised). + (pthread_mutex_init): Set 'staticinit' flag to 0 for the new mutex. + +Sun Jan 17 12:01:26 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_sem_timedwait): Move from semaphore.c. + + * semaphore.c : Remove redundant #includes. + (ptw32_sem_timedwait): Move to private.c. + (sem_wait): Add missing abstime arg to pthreadCancelableWait() call. + +Fri Jan 15 23:38:05 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * condvar.c (cond_timedwait): Remove comment. + +Fri Jan 15 15:41:28 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * pthread.h: Add new 'abstime' arg to pthreadCancelableWait() + prototype. + + * condvar.c (cond_timedwait): New generalised function called by + both pthread_cond_wait() and pthread_cond_timedwait(). This is + essentially pthread_cond_wait() renamed and modified to add the + 'abstime' arg and call the new ptw32_sem_timedwait() instead of + sem_wait(). + (pthread_cond_wait): Now just calls the internal static + function cond_timedwait() with an INFINITE wait. + (pthread_cond_timedwait): Now implemented. Calls the internal + static function cond_timedwait(). + + * implement.h (ptw32_sem_timedwait): New internal function + prototype. + + * misc.c (pthreadCancelableWait): Added new 'abstime' argument + to allow shorter than INFINITE wait. + + * semaphore.c (ptw32_sem_timedwait): New function for internal + use. This is essentially sem_wait() modified to add the + 'abstime' arg and call the modified (see above) + pthreadCancelableWait(). + +Thu Jan 14 14:27:13 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * cleanup.c: Correct _cplusplus to __cplusplus wherever used. + + * Makefile.in: Add CC=g++ and add -fhandle-exceptions to CFLAGS. + The derived Makefile will compile all units of the package as C++ + so that those which include try/catch exception handling should work + properly. The package should compile ok if CC=gcc, however, exception + handling will not be included and thus thread cancellation, for + example, will not work. + + * cleanup.c (ptw32_pop_cleanup): Add #warning to compile this + file as C++ if using a cygwin32 environment. Perhaps the whole package + should be compiled using g++ under cygwin. + + * private.c (ptw32_threadStart): Change #error directive + into #warning and bracket for __CYGWIN__ and derivative compilers. + +Wed Jan 13 09:34:52 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * build.bat: Delete old binaries before compiling/linking. + +Tue Jan 12 09:58:38 1999 Tor Lillqvist <tml at iki.fi> + + * dll.c: The Microsoft compiler pragmas probably are more + appropriately protected by _MSC_VER than by _WIN32. + + * pthread.h: Define ETIMEDOUT. This should be returned by + pthread_cond_timedwait which is not implemented yet as of + snapshot-1999-01-04-1305. It was implemented in the older version. + The Microsoft compiler pragmas probably are more appropriately + protected by _MSC_VER than by _WIN32. + + * pthread.def: pthread_mutex_destroy was missing from the def file + + * condvar.c (pthread_cond_broadcast): Ensure we only wait on threads + if there were any waiting on the condition. + I think pthread_cond_broadcast should do the WaitForSingleObject + only if cv->waiters > 0? Otherwise it seems to hang, at least in the + testg thread program from glib. + +Tue Jan 12 09:58:38 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * condvar.c (pthread_cond_timedwait): Fix function description + comments. + + * semaphore.c (sem_post): Correct typo in comment. + +Mon Jan 11 20:33:19 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h: Re-arrange conditional compile of pthread_cleanup-* + macros. + + * cleanup.c (ptw32_push_cleanup): Provide conditional + compile of cleanup->prev. + +1999-01-11 Tor Lillqvist <tml at iki.fi> + + * condvar.c (pthread_cond_init): Invert logic when testing the + return value from calloc(). + +Sat Jan 9 14:32:08 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Compile-time switch for CYGWIN derived environments + to use CreateThread instead of _beginthreadex. Ditto for ExitThread. + Patch provided by Anders Norlander <anorland at hem2.passagen.se>. + +Tue Jan 5 16:33:04 1999 Ross Johnson <rpj at swan.canberra.edu.au> + + * cleanup.c (ptw32_pop_cleanup): Add C++ version of __try/__except + block. Move trailing "}" out of #ifdef _WIN32 block left there by + (rpj's) mistake. + + * private.c: Remove #include <errno.h> which is included by pthread.h. + +1998-12-11 Ben Elliston <bje at toilet.to.cygnus.com> + + * README: Update info about subscribing to the mailing list. + +Mon Jan 4 11:23:40 1999 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * all: No code changes, just cleanup. + - remove #if 0 /* Pre Bossom */ enclosed code. + - Remove some redundant #includes. + * pthread.h: Update implemented/unimplemented routines list. + * Tag the bossom merge branch getting ready to merge back to main + trunk. + +Tue Dec 29 13:11:16 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Move the following struct definitions to pthread.h: + pthread_t_, pthread_attr_t_, pthread_mutex_t_, pthread_mutex_t_, + pthread_mutexattr_t_, pthread_key_t_, pthread_cond_t_, + pthread_condattr_t_, pthread_once_t_. + + * pthread.h: Add "_" prefix to pthread_push_cleanup and + pthread_pop_cleanup internal routines, and associated struct and + typedefs. + + * buildlib.bat: Add compile command for semaphore.c + + * pthread.def: Comment out pthread_atfork routine name. + Now unimplemented. + + * tsd.c (pthread_setspecific): Rename tkAssocCreate to + ptw32_tkAssocCreate. + (pthread_key_delete): Rename tkAssocDestroy to + ptw32_tkAssocDestroy. + + * sync.c (pthread_join): Rename threadDestroy to ptw32_threadDestroy + + * sched.c (is_attr): attr is now **attr (was *attr), so add extra + NULL pointer test. + (pthread_attr_setschedparam): Increase redirection for attr which is + now a **. + (pthread_attr_getschedparam): Ditto. + (pthread_setschedparam): Change thread validation and rename "thread" + Win32 thread Handle element name to match John Bossom's version. + (pthread_getschedparam): Ditto. + + * private.c (ptw32_threadDestroy): Rename call to + callUserDestroyRoutines() as ptw32_callUserDestroyRoutines() + + * misc.c: Add #include "implement.h". + + * dll.c: Remove defined(KLUDGE) wrapped code. + + * fork.c: Remove redefinition of ENOMEM. + Remove pthread_atfork() and fork() with #if 0/#endif. + + * create.c (pthread_create): Rename threadStart and threadDestroy calls + to ptw32_threadStart and ptw32_threadDestroy. + + * implement.h: Rename "detachedstate" to "detachstate". + + * attr.c: Rename "detachedstate" to "detachstate". + +Mon Dec 28 09:54:39 1998 John Bossom + + * semaphore.c: Initial version. + * semaphore.h: Initial version. + +Mon Dec 28 09:54:39 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.h (pthread_attr_t_): Change to *pthread_attr_t. + +Mon Dec 28 09:54:39 1998 John Bossom, Ben Elliston + + * attr.c (pthread_attr_setstacksize): Merge with John's version. + (pthread_attr_getstacksize): Merge with John's version. + (pthread_attr_setstackaddr): Merge with John's version. + (pthread_attr_getstackaddr): Merge with John's version. + (pthread_attr_init): Merge with John's version. + (pthread_attr_destroy): Merge with John's version. + (pthread_attr_getdetachstate): Merge with John's version. + (pthread_attr_setdetachstate): Merge with John's version. + (is_attr): attr is now **attr (was *attr), so add extra NULL pointer + test. + +Mon Dec 28 09:54:39 1998 Ross Johnson + + * implement.h (pthread_attr_t_): Add and rename elements in JEB's + version to correspond to original, so that it can be used with + original attr routines. + + * pthread.h: Add #endif at end which was truncated in merging. + +Sun Dec 20 14:51:58 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * misc.c (pthreadCancelableWait): New function by John Bossom. Non-standard + but provides a hook that can be used to implement cancellation points in + applications that use this library. + + * pthread.h (pthread_cleanup_pop): C++ (non-WIN32) version uses + try/catch to emulate John Bossom's WIN32 __try/__finally behaviour. + In the WIN32 version __finally block, add a test for AbnormalTermination otherwise + cleanup is only run if the cleanup_pop execute arg is non-zero. Cancellation + should cause the cleanup to run irrespective of the execute arg. + + * condvar.c (pthread_condattr_init): Replaced by John Bossom's version. + (pthread_condattr_destroy): Replaced by John Bossom's version. + (pthread_condattr_getpshared): Replaced by John Bossom's version. + (pthread_condattr_setpshared): Replaced by John Bossom's version. + (pthread_cond_init): Replaced by John Bossom's version. + Fix comment (refered to mutex rather than condition variable). + (pthread_cond_destroy): Replaced by John Bossom's version. + (pthread_cond_wait): Replaced by John Bossom's version. + (pthread_cond_timedwait): Replaced by John Bossom's version. + (pthread_cond_signal): Replaced by John Bossom's version. + (pthread_cond_broadcast): Replaced by John Bossom's version. + +Thu Dec 17 19:10:46 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * tsd.c (pthread_key_create): Replaced by John Bossom's version. + (pthread_key_delete): Replaced by John Bossom's version. + (pthread_setspecific): Replaced by John Bossom's version. + (pthread_getspecific): Replaced by John Bossom's version. + +Mon Dec 7 09:44:40 1998 John Bossom + + * cancel.c (pthread_setcancelstate): Replaced. + (pthread_setcanceltype): Replaced. + (pthread_testcancel): Replaced. + (pthread_cancel): Replaced. + + * exit.c (pthread_exit): Replaced. + + * misc.c (pthread_self): Replaced. + (pthread_equal): Replaced. + + * sync.c (pthread_detach): Replaced. + (pthread_join): Replaced. + + * create.c (pthread_create): Replaced. + + * private.c (ptw32_processInitialize): New. + (ptw32_processTerminate): New. + (ptw32_threadStart): New. + (ptw32_threadDestroy): New. + (ptw32_cleanupStack): New. + (ptw32_tkAssocCreate): New. + (ptw32_tkAssocDestroy): New. + (ptw32_callUserDestroyRoutines): New. + + * implement.h: Added non-API structures and declarations. + + * dll.c (PthreadsEntryPoint): Cast return value of GetProcAddress + to resolve compile warning from MSVC. + + * dll.c (DLLmain): Replaced. + * dll.c (PthreadsEntryPoint): + Re-applied Anders Norlander's patch:- + Initialize ptw32_try_enter_critical_section at startup + and release kernel32 handle when DLL is being unloaded. + +Sun Dec 6 21:54:35 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * buildlib.bat: Fix args to CL when building the .DLL + + * cleanup.c (ptw32_destructor_run_all): Fix TSD key management. + This is a tidy-up before TSD and Thread management is completely + replaced by John Bossom's code. + + * tsd.c (pthread_key_create): Fix TSD key management. + + * global.c (ptw32_key_virgin_next): Initialise. + + * build.bat: New DOS script to compile and link a pthreads app + using Microsoft's CL compiler linker. + * buildlib.bat: New DOS script to compile all the object files + and create pthread.lib and pthread.dll using Microsoft's CL + compiler linker. + +1998-12-05 Anders Norlander <anorland at hem2.passagen.se> + + * implement.h (ptw32_try_enter_critical_section): New extern + * dll.c (ptw32_try_enter_critical_section): New pointer to + TryEnterCriticalSection if it exists; otherwise NULL. + * dll.c (PthreadsEntryPoint): + Initialize ptw32_try_enter_critical_section at startup + and release kernel32 handle when DLL is being unloaded. + * mutex.c (pthread_mutex_trylock): Replaced check for NT with + a check if ptw32_try_enter_critical_section is valid + pointer to a function. Call ptw32_try_enter_critical_section + instead of TryEnterCriticalSection to avoid errors on Win95. + +Thu Dec 3 13:32:00 1998 Ross Johnson <rpj at ise.canberra.edu.au> + + * README: Correct cygwin32 compatibility statement. + +Sun Nov 15 21:24:06 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * cleanup.c (ptw32_destructor_run_all): Declare missing void * arg. + Fixup CVS merge conflicts. + +1998-10-30 Ben Elliston <bje at cygnus.com> + + * condvar.c (cond_wait): Fix semantic error. Test for equality + instead of making an assignment. + +Fri Oct 30 15:15:50 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * cleanup.c (ptw32_handler_push): Fixed bug appending new + handler to list reported by Peter Slacik + <Peter.Slacik at leibinger.freinet.de>. + (new_thread): Rename poorly named local variable to + "new_handler". + +Sat Oct 24 18:34:59 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * global.c: Add TSD key management array and index declarations. + + * implement.h: Ditto for externs. + +Fri Oct 23 00:08:09 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h (PTW32_TSD_KEY_REUSE): Add enum. + + * private.c (ptw32_delete_thread): Add call to + ptw32_destructor_run_all() to clean up the threads keys. + + * cleanup.c (ptw32_destructor_run_all): Check for no more dirty + keys to run destructors on. Assume that the destructor call always + succeeds and set the key value to NULL. + +Thu Oct 22 21:44:44 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * tsd.c (pthread_setspecific): Add key management code. + (pthread_key_create): Ditto. + (pthread_key_delete): Ditto. + + * implement.h (struct ptw32_tsd_key): Add status member. + + * tsd.c: Add description of pthread_key_delete() from the + standard as a comment. + +Fri Oct 16 17:38:47 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * cleanup.c (ptw32_destructor_run_all): Fix and improve + stepping through the key table. + +Thu Oct 15 14:05:01 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * private.c (ptw32_new_thread): Remove init of destructorstack. + No longer an element of pthread_t. + + * tsd.c (pthread_setspecific): Fix type declaration and cast. + (pthread_getspecific): Ditto. + (pthread_getspecific): Change error return value to NULL if key + is not in use. + +Thu Oct 15 11:53:21 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * global.c (ptw32_tsd_key_table): Fix declaration. + + * implement.h(ptw32_TSD_keys_TlsIndex): Add missing extern. + (ptw32_tsd_mutex): Ditto. + + * create.c (ptw32_start_call): Fix "keys" array declaration. + Add comment. + + * tsd.c (pthread_setspecific): Fix type declaration and cast. + (pthread_getspecific): Ditto. + + * cleanup.c (ptw32_destructor_run_all): Declare missing loop + counter. + +Wed Oct 14 21:09:24 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_new_thread): Increment ptw32_threads_count. + (ptw32_delete_thread): Decrement ptw32_threads_count. + Remove some comments. + + * exit.c (ptw32_exit): : Fix two pthread_mutex_lock() calls that + should have been pthread_mutex_unlock() calls. + (ptw32_vacuum): Remove call to ptw32_destructor_pop_all(). + + * create.c (pthread_create): Fix two pthread_mutex_lock() calls that + should have been pthread_mutex_unlock() calls. + + * global.c (ptw32_tsd_mutex): Add mutex for TSD operations. + + * tsd.c (pthread_key_create): Add critical section. + (pthread_setspecific): Ditto. + (pthread_getspecific): Ditto. + (pthread_key_delete): Ditto. + + * sync.c (pthread_join): Fix two pthread_mutex_lock() calls that + should have been pthread_mutex_unlock() calls. + +Mon Oct 12 00:00:44 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h (ptw32_tsd_key_table): New. + + * create.c (ptw32_start_call): Initialise per-thread TSD keys + to NULL. + + * misc.c (pthread_once): Correct typo in comment. + + * implement.h (ptw32_destructor_push): Remove. + (ptw32_destructor_pop): Remove. + (ptw32_destructor_run_all): Rename from ptw32_destructor_pop_all. + (PTW32_TSD_KEY_DELETED): Add enum. + (PTW32_TSD_KEY_INUSE): Add enum. + + * cleanup.c (ptw32_destructor_push): Remove. + (ptw32_destructor_pop): Remove. + (ptw32_destructor_run_all): Totally revamped TSD. + + * dll.c (ptw32_TSD_keys_TlsIndex): Initialise. + + * tsd.c (pthread_setspecific): Totally revamped TSD. + (pthread_getspecific): Ditto. + (pthread_create): Ditto. + (pthread_delete): Ditto. + +Sun Oct 11 22:44:55 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * global.c (ptw32_tsd_key_table): Add new global. + + * implement.h (ptw32_tsd_key_t and struct ptw32_tsd_key): + Add. + (struct _pthread): Remove destructorstack. + + * cleanup.c (ptw32_destructor_run_all): Rename from + ptw32_destructor_pop_all. The key destructor stack was made + global rather than per-thread. No longer removes destructor nodes + from the stack. Comments updated. + +1998-10-06 Ben Elliston <bje at cygnus.com> + + * condvar.c (cond_wait): Use POSIX, not Win32 mutex calls. + (pthread_cond_broadcast): Likewise. + (pthread_cond_signal): Likewise. + +1998-10-05 Ben Elliston <bje at cygnus.com> + + * pthread.def: Update. Some functions aren't available yet, others + are macros in <pthread.h>. + + * tests/join.c: Remove; useless. + +Mon Oct 5 14:25:08 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * pthread.def: New file for building the DLL. + +1998-10-05 Ben Elliston <bje at cygnus.com> + + * misc.c (pthread_equal): Correct inverted logic bug. + (pthread_once): Use the POSIX mutex primitives, not Win32. Remove + irrelevant FIXME comment. + + * global.c (PTHREAD_MUTEX_INITIALIZER): Move to pthread.h. + + * pthread.h (PTHREAD_MUTEX_INITIALIZER): Define. + (pthread_mutex_t): Reimplement as a struct containing a valid + flag. If the flag is ever down upon entry to a mutex operation, + we call pthread_mutex_create() to initialise the object. This + fixes the problem of how to handle statically initialised objects + that can't call InitializeCriticalSection() due to their context. + (PTHREAD_ONCE_INIT): Define. + + * mutex.c (pthread_mutex_init): Set valid flag. + (pthread_mutex_destroy): Clear valid flag. + (pthread_mutex_lock): Check and handle the valid flag. + (pthread_mutex_unlock): Likewise. + (pthread_mutex_trylock): Likewise. + + * tests/mutex3.c: New file; test for the static initialisation + macro. Passes. + + * tests/create1.c: New file; test pthread_create(). Passes. + + * tests/equal.c: Poor test; remove. + + * tests/equal1.c New file; test pthread_equal(). Passes. + + * tests/once1.c: New file; test for pthread_once(). Passes. + + * tests/self.c: Remove; rename to self1.c. + + * tests/self1.c: This is the old self.c. + + * tests/self2.c: New file. Test pthread_self() with a single + thread. Passes. + + * tests/self3.c: New file. Test pthread_self() with a couple of + threads to ensure their thread IDs differ. Passes. + +1998-10-04 Ben Elliston <bje at cygnus.com> + + * tests/mutex2.c: Test pthread_mutex_trylock(). Passes. + + * tests/mutex1.c: New basic test for mutex functions (it passes). + (main): Eliminate warning. + + * configure.in: Test for __stdcall, not _stdcall. Typo. + + * configure: Regenerate. + + * attr.c (pthread_attr_setstackaddr): Remove FIXME comment. Win32 + does know about ENOSYS after all. + (pthread_attr_setstackaddr): Likewise. + +1998-10-03 Ben Elliston <bje at cygnus.com> + + * configure.in: Test for the `_stdcall' keyword. Define `STDCALL' + to `_stdcall' if we have it, null otherwise. + + * configure: Regenerate. + + * acconfig.h (STDCALL): New define. + + * config.h.in: Regenerate. + + * create.c (ptw32_start_call): Add STDCALL prefix. + + * mutex.c (pthread_mutex_init): Correct function signature. + + * attr.c (pthread_attr_init): Only zero out the `sigmask' member + if we have the sigset_t type. + + * pthread.h: No need to include <unistd.h>. It doesn't even exist + on Win32! Again, an artifact of cross-compilation. + (pthread_sigmask): Only provide if we have the sigset_t type. + + * process.h: Remove. This was a stand-in before we started doing + native compilation under Win32. + + * pthread.h (pthread_mutex_init): Make `attr' argument const. + +1998-10-02 Ben Elliston <bje at cygnus.com> + + * COPYING: Remove. + + * COPYING.LIB: Add. This library is under the LGPL. + +1998-09-13 Ben Elliston <bje at cygnus.com> + + * configure.in: Test for required system features. + + * configure: Generate. + + * acconfig.h: New file. + + * config.h.in: Generate. + + * Makefile.in: Renamed from Makefile. + + * COPYING: Import from a recent GNU package. + + * config.guess: Likewise. + + * config.sub: Likewise. + + * install-sh: Likewise. + + * config.h: Remove. + + * Makefile: Likewise. + +1998-09-12 Ben Elliston <bje at cygnus.com> + + * windows.h: No longer needed; remove. + + * windows.c: Likewise. + +Sat Sep 12 20:09:24 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * windows.h: Remove error number definitions. These are in <errno.h> + + * tsd.c: Add comment explaining rationale for not building + POSIX TSD on top of Win32 TLS. + +1998-09-12 Ben Elliston <bje at cygnus.com> + + * {most}.c: Include <errno.h> to get POSIX error values. + + * signal.c (pthread_sigmask): Only provide if HAVE_SIGSET_T is + defined. + + * config.h: #undef features, don't #define them. This will be + generated by autoconf very soon. + +1998-08-11 Ben Elliston <bje at cygnus.com> + + * Makefile (LIB): Define. + (clean): Define target. + (all): Build a library not just the object files. + + * pthread.h: Provide a definition for struct timespec if we don't + already have one. + + * windows.c (TlsGetValue): Bug fix. + +Thu Aug 6 15:19:22 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * misc.c (pthread_once): Fix arg 1 of EnterCriticalSection() + and LeaveCriticalSection() calls to pass address-of lock. + + * fork.c (pthread_atfork): Typecast (void (*)(void *)) funcptr + in each ptw32_handler_push() call. + + * exit.c (ptw32_exit): Fix attr arg in + pthread_attr_getdetachstate() call. + + * private.c (ptw32_new_thread): Typecast (HANDLE) NULL. + (ptw32_delete_thread): Ditto. + + * implement.h: (PTW32_MAX_THREADS): Add define. This keeps + changing in an attempt to make thread administration data types + opaque and cleanup DLL startup. + + * dll.c (PthreadsEntryPoint): + (ptw32_virgins): Remove malloc() and free() calls. + (ptw32_reuse): Ditto. + (ptw32_win32handle_map): Ditto. + (ptw32_threads_mutex_table): Ditto. + + * global.c (_POSIX_THREAD_THREADS_MAX): Initialise with + PTW32_MAX_THREADS. + (ptw32_virgins): Ditto. + (ptw32_reuse): Ditto. + (ptw32_win32handle_map): Ditto. + (ptw32_threads_mutex_table): Ditto. + + * create.c (pthread_create): Typecast (HANDLE) NULL. + Typecast (unsigned (*)(void *)) start_routine. + + * condvar.c (pthread_cond_init): Add address-of operator & to + arg 1 of pthread_mutex_init() call. + (pthread_cond_destroy): Add address-of operator & to + arg 1 of pthread_mutex_destroy() call. + + * cleanup.c (ptw32_destructor_pop_all): Add (int) cast to + pthread_getspecific() arg. + (ptw32_destructor_pop): Add (void *) cast to "if" conditional. + (ptw32_destructor_push): Add (void *) cast to + ptw32_handler_push() "key" arg. + (malloc.h): Add include. + + * implement.h (ptw32_destructor_pop): Add prototype. + + * tsd.c (implement.h): Add include. + + * sync.c (pthread_join): Remove target_thread_mutex and it's + initialisation. Rename getdetachedstate to getdetachstate. + Remove unused variable "exitcode". + (pthread_detach): Remove target_thread_mutex and it's + initialisation. Rename getdetachedstate to getdetachstate. + Rename setdetachedstate to setdetachstate. + + * signal.c (pthread_sigmask): Rename SIG_SET to SIG_SETMASK. + Cast "set" to (long *) in assignment to passify compiler warning. + Add address-of operator & to thread->attr.sigmask in memcpy() call + and assignment. + (pthread_sigmask): Add address-of operator & to thread->attr.sigmask + in memcpy() call and assignment. + + * windows.h (THREAD_PRIORITY_ERROR_RETURN): Add. + (THREAD_PRIORITY_LOWEST): Add. + (THREAD_PRIORITY_HIGHEST): Add. + + * sched.c (is_attr): Add function. + (implement.h): Add include. + (pthread_setschedparam): Rename all instances of "sched_policy" + to "sched_priority". + (pthread_getschedparam): Ditto. + +Tue Aug 4 16:57:58 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * private.c (ptw32_delete_thread): Fix typo. Add missing ';'. + + * global.c (ptw32_virgins): Change types from pointer to + array pointer. + (ptw32_reuse): Ditto. + (ptw32_win32handle_map): Ditto. + (ptw32_threads_mutex_table): Ditto. + + * implement.h(ptw32_virgins): Change types from pointer to + array pointer. + (ptw32_reuse): Ditto. + (ptw32_win32handle_map): Ditto. + (ptw32_threads_mutex_table): Ditto. + + * private.c (ptw32_delete_thread): Fix "entry" should be "thread". + + * misc.c (pthread_self): Add extern for ptw32_threadID_TlsIndex. + + * global.c: Add comment. + + * misc.c (pthread_once): Fix member -> dereferences. + Change ptw32_once_flag to once_control->flag in "if" test. + +Tue Aug 4 00:09:30 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h(ptw32_virgins): Add extern. + (ptw32_virgin_next): Ditto. + (ptw32_reuse): Ditto. + (ptw32_reuse_top): Ditto. + (ptw32_win32handle_map): Ditto. + (ptw32_threads_mutex_table): Ditto. + + * global.c (ptw32_virgins): Changed from array to pointer. + Storage allocation for the array moved into dll.c. + (ptw32_reuse): Ditto. + (ptw32_win32handle_map): Ditto. + (ptw32_threads_mutex_table): Ditto. + + * dll.c (PthreadsEntryPoint): Set up thread admin storage when + DLL is loaded. + + * fork.c (pthread_atfork): Fix function pointer arg to all + ptw32_handler_push() calls. Change "arg" arg to NULL in child push. + + * exit.c: Add windows.h and process.h includes. + (ptw32_exit): Add local detachstate declaration. + (ptw32_exit): Fix incorrect name for pthread_attr_getdetachstate(). + + * pthread.h (_POSIX_THREAD_ATTR_STACKSIZE): Move from global.c + (_POSIX_THREAD_ATTR_STACKADDR): Ditto. + + * create.c (pthread_create): Fix #if should be #ifdef. + (ptw32_start_call): Remove usused variables. + + * process.h: Create. + + * windows.h: Move _beginthreadex and _endthreadex into + process.h + +Mon Aug 3 21:19:57 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * condvar.c (pthread_cond_init): Add NULL attr to + pthread_mutex_init() call - default attributes will be used. + (cond_wait): Fix typo. + (cond_wait): Fix typo - cv was ev. + (pthread_cond_broadcast): Fix two identical typos. + + * cleanup.c (ptw32_destructor_pop_all): Remove _ prefix from + PTHREAD_DESTRUCTOR_ITERATIONS. + + * pthread.h: Move _POSIX_* values into posix.h + + * pthread.h: Fix typo in pthread_mutex_init() prototype. + + * attr.c (pthread_attr_init): Fix error in priority member init. + + * windows.h (THREAD_PRIORITY_NORMAL): Add. + + * pthread.h (sched_param): Add missing ';' to struct definition. + + * attr.c (pthread_attr_init): Remove obsolete pthread_attr_t + member initialisation - cancelstate, canceltype, cancel_pending. + (is_attr): Make arg "attr" a const. + + * implement.h (PTW32_HANDLER_POP_LIFO): Remove definition. + (PTW32_HANDLER_POP_FIFO): Ditto. + (PTW32_VALID): Add missing newline escape (\). + (ptw32_handler_node): Make element "next" a pointer. + +1998-08-02 Ben Elliston <bje at cygnus.com> + + * windows.h: Remove duplicate TlsSetValue() prototype. Add + TlsGetValue() prototype. + (FALSE): Define. + (TRUE): Likewise. + Add forgotten errno values. Guard against multiple #includes. + + * windows.c: New file. Implement stubs for Win32 functions. + + * Makefile (SRCS): Remove. Not explicitly needed. + (CFLAGS): Add -Wall for all warnings with GCC. + +Sun Aug 2 19:03:42 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * config.h: Create. This is a temporary stand-in for autoconf yet + to be done. + (HAVE_SIGNAL_H): Add. + + * pthread.h: Minor rearrangement for temporary config.h. + +Fri Jul 31 14:00:29 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * cleanup.c (ptw32_destructor_pop): Implement. Removes + destructors associated with a key without executing them. + (ptw32_destructor_pop_all): Add FIXME comment. + + * tsd.c (pthread_key_delete): Add call to ptw32_destructor_pop(). + +Fri Jul 31 00:05:45 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * tsd.c (pthread_key_create): Update to properly associate + the destructor routine with the key. + (pthread_key_delete): Add FIXME comment. + + * exit.c (ptw32_vacuum): Add call to + ptw32_destructor_pop_all(). + + * implement.h (ptw32_handler_pop_all): Add prototype. + (ptw32_destructor_pop_all): Ditto. + + * cleanup.c (ptw32_destructor_push): Implement. This is just a + call to ptw32_handler_push(). + (ptw32_destructor_pop_all): Implement. This is significantly + different to ptw32_handler_pop_all(). + + * Makefile (SRCS): Create. Preliminary. + + * windows.h: Create. Contains Win32 definitions for compile + testing. This is just a standin for the real one. + + * pthread.h (SIG_UNBLOCK): Fix typo. Was SIG_BLOCK. + (windows.h): Add include. Required for CRITICAL_SECTION. + (pthread_cond_t): Move enum declaration outside of struct + definition. + (unistd.h): Add include - may be temporary. + + * condvar.c (windows.h): Add include. + + * implement.h (PTW32_THIS): Remove - no longer required. + (PTW32_STACK): Use pthread_self() instead of PTW32_THIS. + +Thu Jul 30 23:12:45 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Remove ptw32_find_entry() prototype. + + * private.c: Extend comments. + Remove ptw32_find_entry() - no longer needed. + + * create.c (ptw32_start_call): Add call to TlsSetValue() to + store the thread ID. + + * dll.c (PthreadsEntryPoint): Implement. This is called + whenever a process loads the DLL. Used to initialise thread + local storage. + + * implement.h: Add ptw32_threadID_TlsIndex. + Add ()s around PTW32_VALID expression. + + * misc.c (pthread_self): Re-implement using Win32 TLS to store + the threads own ID. + +Wed Jul 29 11:39:03 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c: Corrections in comments. + (ptw32_new_thread): Alter "if" flow to be more natural. + + * cleanup.c (ptw32_handler_push): Same as below. + + * create.c (pthread_create): Same as below. + + * private.c (ptw32_new_thread): Rename "new" to "new_thread". + Since when has a C programmer been required to know C++? + +Tue Jul 28 14:04:29 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * implement.h: Add PTW32_VALID macro. + + * sync.c (pthread_join): Modify to use the new thread + type and ptw32_delete_thread(). Rename "target" to "thread". + Remove extra local variable "target". + (pthread_detach): Ditto. + + * signal.c (pthread_sigmask): Move init of "us" out of inner block. + Fix instance of "this" should have been "us". Rename "us" to "thread". + + * sched.c (pthread_setschedparam): Modify to use the new thread + type. + (pthread_getschedparam): Ditto. + + * private.c (ptw32_find_thread): Fix return type and arg. + + * implement.h: Remove PTW32_YES and PTW32_NO. + (ptw32_new_thread): Add prototype. + (ptw32_find_thread): Ditto. + (ptw32_delete_thread): Ditto. + (ptw32_new_thread_entry): Remove prototype. + (ptw32_find_thread_entry): Ditto. + (ptw32_delete_thread_entry): Ditto. + ( PTW32_NEW, PTW32_INUSE, PTW32_EXITED, PTW32_REUSE): + Add. + + + * create.c (pthread_create): Minor rename "us" to "new" (I need + these cues but it doesn't stop me coming out with some major bugs + at times). + Load start_routine and arg into the thread so the wrapper can + call it. + + * exit.c (pthread_exit): Fix pthread_this should be pthread_self. + + * cancel.c (pthread_setcancelstate): Change + ptw32_threads_thread_t * to pthread_t and init with + pthread_this(). + (pthread_setcanceltype): Ditto. + + * exit.c (ptw32_exit): Add new pthread_t arg. + Rename ptw32_delete_thread_entry to ptw32_delete_thread. + Rename "us" to "thread". + (pthread_exit): Call ptw32_exit with added thread arg. + + * create.c (ptw32_start_call): Insert missing ")". + Add "us" arg to ptw32_exit() call. + (pthread_create): Modify to use new thread allocation scheme. + + * private.c: Added detailed explanation of the new thread + allocation scheme. + (ptw32_new_thread): Totally rewritten to use + new thread allocation scheme. + (ptw32_delete_thread): Ditto. + (ptw32_find_thread): Obsolete. + +Mon Jul 27 17:46:37 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * create.c (pthread_create): Start of rewrite. Not completed yet. + + * private.c (ptw32_new_thread_entry): Start of rewrite. Not + complete. + + * implement.h (ptw32_threads_thread): Rename, remove thread + member, add win32handle and ptstatus members. + (ptw32_t): Add. + + * pthread.h: pthread_t is no longer mapped directly to a Win32 + HANDLE type. This is so we can let the Win32 thread terminate and + reuse the HANDLE while pthreads holds it's own thread ID until + the last waiting join exits. + +Mon Jul 27 00:20:37 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_delete_thread_entry): Destroy the thread + entry attribute object before deleting the thread entry itself. + + * attr.c (pthread_attr_init): Initialise cancel_pending = FALSE. + (pthread_attr_setdetachstate): Rename "detached" to "detachedstate". + (pthread_attr_getdetachstate): Ditto. + + * exit.c (ptw32_exit): Fix incorrect check for detachedstate. + + * implement.h (ptw32_call_t): Remove env member. + +Sun Jul 26 13:06:12 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h (ptw32_new_thread_entry): Fix prototype. + (ptw32_find_thread_entry): Ditto. + (ptw32_delete_thread_entry): Ditto. + (ptw32_exit): Add prototype. + + * exit.c (ptw32_exit): New function. Called from pthread_exit() + and ptw32_start_call() to exit the thread. It allows an extra + argument which is the return code passed to _endthreadex(). + (ptw32_exit): Move thread entry delete call from ptw32_vacuum() + into here. Add more explanation of thread entry deletion. + (ptw32_exit): Clarify comment. + + * create.c (ptw32_start_call): Change pthread_exit() call to + ptw32_exit() call. + + * exit.c (ptw32_vacuum): Add thread entry deletion code + moved from ptw32_start_call(). See next item. + (pthread_exit): Remove longjmp(). Add mutex lock around thread table + manipulation code. This routine now calls _enthreadex(). + + * create.c (ptw32_start_call): Remove setjmp() call and move + cleanup code out. Call pthread_exit(NULL) to terminate the thread. + +1998-07-26 Ben Elliston <bje at cygnus.com> + + * tsd.c (pthread_getspecific): Update comments. + + * mutex.c (pthread_mutexattr_setpshared): Not supported; remove. + (pthread_mutexattr_getpshared): Likewise. + + * pthread.h (pthread_mutexattr_setpshared): Remove prototype. + (pthread_mutexattr_getpshared): Likewise. + +Sun Jul 26 00:09:59 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sync.c: Rename all instances of ptw32_count_mutex to + ptw32_table_mutex. + + * implement.h: Rename ptw32_count_mutex to + ptw32_table_mutex. + + * global.c: Rename ptw32_count_mutex to + ptw32_table_mutex. + + * create.c (pthread_create): Add critical sections. + (ptw32_start_call): Rename ptw32_count_mutex to + ptw32_table_mutex. + + * cancel.c (pthread_setcancelstate): Fix indirection bug and rename + "this" to "us". + + * signal.c (pthread_sigmask): Rename "this" to "us" and fix some + minor syntax errors. Declare "us" and initialise it. + + * sync.c (pthread_detach): Rename "this" to "target". + + * pthread.h: Converting PTHREAD_* defines to alias the (const int) + values in global.c. + + * global.c: Started converting PTHREAD_* defines to (const int) as + a part of making the eventual pthreads DLL binary compatible + through version changes. + + * condvar.c (cond_wait): Add cancelation point. This applies the + point to both pthread_cond_wait() and pthread_cond_timedwait(). + + * exit.c (pthread_exit): Rename "this" to "us". + + * implement.h: Add comment. + + * sync.c (pthread_join): I've satisfied myself that pthread_detach() + does set the detached attribute in the thread entry attributes + to PTHREAD_CREATE_DETACHED. "if" conditions were changed to test + that attribute instead of a separate flag. + + * create.c (pthread_create): Rename "this" to "us". + (pthread_create): cancelstate and canceltype are not attributes + so the copy to thread entry attribute storage was removed. + Only the thread itself can change it's cancelstate or canceltype, + ie. the thread must exist already. + + * private.c (ptw32_delete_thread_entry): Mutex locks removed. + Mutexes must be applied at the caller level. + (ptw32_new_thread_entry): Ditto. + (ptw32_new_thread_entry): Init cancelstate, canceltype, and + cancel_pending to default values. + (ptw32_new_thread_entry): Rename "this" to "new". + (ptw32_find_thread_entry): Rename "this" to "entry". + (ptw32_delete_thread_entry): Rename "thread_entry" to "entry". + + * create.c (ptw32_start_call): Mutexes changed to + ptw32_count_mutex. All access to the threads table entries is + under the one mutex. Otherwise chaos reigns. + +Sat Jul 25 23:16:51 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h (ptw32_threads_thread): Move cancelstate and + canceltype members out of pthread_attr_t into here. + + * fork.c (fork): Add comment. + +1998-07-25 Ben Elliston <bje at cygnus.com> + + * fork.c (fork): Autoconfiscate. + +Sat Jul 25 00:00:13 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * create.c (ptw32_start_call): Set thread priority. Ensure our + thread entry is removed from the thread table but only if + pthread_detach() was called and there are no waiting joins. + (pthread_create): Set detach flag in thread entry if the + thread is created PTHREAD_CREATE_DETACHED. + + * pthread.h (pthread_attr_t): Rename member "detachedstate". + + * attr.c (pthread_attr_init): Rename attr members. + + * exit.c (pthread_exit): Fix indirection mistake. + + * implement.h (PTW32_THREADS_TABLE_INDEX): Add. + + * exit.c (ptw32_vacuum): Fix incorrect args to + ptw32_handler_pop_all() calls. + Make thread entry removal conditional. + + * sync.c (pthread_join): Add multiple join and async detach handling. + + * implement.h (PTW32_THREADS_TABLE_INDEX): Add. + + * global.c (ptw32_threads_mutex_table): Add. + + * implement.h (ptw32_once_flag): Remove. + (ptw32_once_lock): Ditto. + (ptw32_threads_mutex_table): Add. + + * global.c (ptw32_once_flag): Remove. + (ptw32_once_lock): Ditto. + + * sync.c (pthread_join): Fix tests involving new return value + from ptw32_find_thread_entry(). + (pthread_detach): Ditto. + + * private.c (ptw32_find_thread_entry): Failure return code + changed from -1 to NULL. + +Fri Jul 24 23:09:33 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * create.c (pthread_create): Change . to -> in sigmask memcpy() args. + + * pthread.h: (pthread_cancel): Add function prototype. + (pthread_testcancel): Ditto. + +1998-07-24 Ben Elliston <bje at cygnus.com> + + * pthread.h (pthread_condattr_t): Rename dummy structure member. + (pthread_mutexattr_t): Likewise. + +Fri Jul 24 21:13:55 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * cancel.c (pthread_cancel): Implement. + (pthread_testcancel): Implement. + + * exit.c (pthread_exit): Add comment explaining the longjmp(). + + * implement.h (ptw32_threads_thread_t): New member cancelthread. + (PTW32_YES): Define. + (PTW32_NO): Define. + (RND_SIZEOF): Remove. + + * create.c (pthread_create): Rename cancelability to cancelstate. + + * pthread.h (pthread_attr_t): Rename cancelability to cancelstate. + (PTHREAD_CANCELED): Define. + +1998-07-24 Ben Elliston <bje at cygnus.com> + + * pthread.h (SIG_BLOCK): Define if not already defined. + (SIG_UNBLOCK): Likewise. + (SIG_SETMASK): Likewise. + (pthread_attr_t): Add signal mask member. + (pthread_sigmask): Add function prototype. + + * signal.c (pthread_sigmask): Implement. + + * create.c: #include <string.h> to get a prototype for memcpy(). + (pthread_create): New threads inherit their creator's signal + mask. Copy the signal mask to the new thread structure if we know + about signals. + +Fri Jul 24 16:33:17 1998 Ross Johnson <rpj at swan.canberra.edu.au> + + * fork.c (pthread_atfork): Add all the necessary push calls. + Local implementation semantics: + If we get an ENOMEM at any time then ALL handlers + (including those from previous pthread_atfork() calls) will be + popped off each of the three atfork stacks before we return. + (fork): Add all the necessary pop calls. Add the thread cancellation + and join calls to the child fork. + Add #includes. + + * implement.h: (ptw32_handler_push): Fix return type and stack arg + type in prototype. + (ptw32_handler_pop): Fix stack arg type in prototype. + (ptw32_handler_pop_all): Fix stack arg type in prototype. + + * cleanup.c (ptw32_handler_push): Change return type to int and + return ENOMEM if malloc() fails. + + * sync.c (pthread_detach): Use equality test, not assignment. + + * create.c (ptw32_start_call): Add call to Win32 CloseHandle() + if thread is detached. + +1998-07-24 Ben Elliston <bje at cygnus.com> + + * sync.c (pthread_detach): Close the Win32 thread handle to + emulate detached (or daemon) threads. + +Fri Jul 24 03:00:25 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sync.c (pthread_join): Save valueptr arg in joinvalueptr for + pthread_exit() to use. + + * private.c (ptw32_new_thread_entry): Initialise joinvalueptr to + NULL. + + * create.c (ptw32_start_call): Rewrite to facilitate joins. + pthread_exit() will do a longjmp() back to here. Does appropriate + cleanup and exit/return from the thread. + (pthread_create): _beginthreadex() now passes a pointer to our + thread table entry instead of just the call member of that entry. + + * implement.h (ptw32_threads_thread): New member + void ** joinvalueptr. + (ptw32_call_t): New member jmpbuf env. + + * exit.c (pthread_exit): Major rewrite to handle joins and handing + value pointer to joining thread. Uses longjmp() back to + ptw32_start_call(). + + * create.c (pthread_create): Ensure values of new attribute members + are copied to the thread attribute object. + + * attr.c (pthread_attr_destroy): Fix merge conflicts. + (pthread_attr_getdetachstate): Fix merge conflicts. + (pthread_attr_setdetachstate): Fix merge conflicts. + + * pthread.h: Fix merge conflicts. + + * sync.c (pthread_join): Fix merge conflicts. + +Fri Jul 24 00:21:21 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * sync.c (pthread_join): Add check for valid and joinable + thread. + (pthread_detach): Implement. After checking for a valid and joinable + thread, it's still a no-op. + + * private.c (ptw32_find_thread_entry): Bug prevented returning + an error value in some cases. + + * attr.c (pthread_attr_setdetachedstate): Implement. + (pthread_attr_getdetachedstate): Implement. + + * implement.h: Move more hidden definitions into here from + pthread.h. + +1998-07-24 Ben Elliston <bje at cygnus.com> + + * pthread.h (PTHREAD_CREATE_JOINABLE): Define. + (PTHREAD_CREATE_DETACHED): Likewise. + (pthread_attr_t): Add new structure member `detached'. + (pthread_attr_getdetachstate): Add function prototype. + (pthread_attr_setdetachstate): Likewise. + + * sync.c (pthread_join): Return if the target thread is detached. + + * attr.c (pthread_attr_init): Initialise cancelability and + canceltype structure members. + (pthread_attr_getdetachstate): Implement. + (pthread_attr_setdetachstate): Likewise. + + * implement.h (PTW32_CANCEL_DEFAULTS): Remove. Bit fields + proved to be too cumbersome. Set the defaults in attr.c using the + public PTHREAD_CANCEL_* constants. + + * cancel.c: New file. + + * pthread.h (sched_param): Define this type. + (pthread_attr_getschedparam): Add function prototype. + (pthread_attr_setschedparam): Likewise. + (pthread_setcancelstate): Likewise. + (pthread_setcanceltype): Likewise. + (sched_get_priority_min): Likewise. + (sched_get_priority_max): Likewise. + (pthread_mutexattr_setprotocol): Remove; not supported. + (pthread_mutexattr_getprotocol): Likewise. + (pthread_mutexattr_setprioceiling): Likewise. + (pthread_mutexattr_getprioceiling): Likewise. + (pthread_attr_t): Add canceltype member. Update comments. + (SCHED_OTHER): Define this scheduling policy constant. + (SCHED_FIFO): Likewise. + (SCHED_RR): Likewise. + (SCHED_MIN): Define the lowest possible value for this constant. + (SCHED_MAX): Likewise, the maximum possible value. + (PTHREAD_CANCEL_ASYNCHRONOUS): Redefine. + (PTHREAD_CANCEL_DEFERRED): Likewise. + + * sched.c: New file. + (pthread_setschedparam): Implement. + (pthread_getschedparam): Implement. + (sched_get_priority_max): Validate policy argument. + (sched_get_priority_min): Likewise. + + * mutex.c (pthread_mutexattr_setprotocol): Remove; not supported. + (pthread_mutexattr_getprotocol): Likewise. + (pthread_mutexattr_setprioceiling): Likewise. + (pthread_mutexattr_getprioceiling): Likewise. + +Fri Jul 24 00:21:21 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * create.c (pthread_create): Arg to ptw32_new_thread_entry() + changed. See next entry. Move mutex locks out. Changes made yesterday + and today allow us to start the new thread running rather than + temporarily suspended. + + * private.c (ptw32_new_thread_entry): ptw32_thread_table + was changed back to a table of thread structures rather than pointers. + As such we're trading storage for increaded speed. This routine + was modified to work with the new table. Mutex lock put in around + global data accesses. + (ptw32_find_thread_entry): Ditto + (ptw32_delete_thread_entry): Ditto + +Thu Jul 23 23:25:30 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * global.c: New. Global data objects declared here. These moved from + pthread.h. + + * pthread.h: Move implementation hidden definitions into + implement.h. + + * implement.h: Move implementation hidden definitions from + pthread.h. Add constants to index into the different handler stacks. + + * cleanup.c (ptw32_handler_push): Simplify args. Restructure. + (ptw32_handler_pop): Simplify args. Restructure. + (ptw32_handler_pop_all): Simplify args. Restructure. + +Wed Jul 22 00:16:22 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * attr.c, implement.h, pthread.h, ChangeLog: Resolve CVS merge + conflicts. + + * private.c (ptw32_find_thread_entry): Changes to return type + to support leaner ptw32_threads_table[] which now only stores + ptw32_thread_thread_t *. + (ptw32_new_thread_entry): Internal changes. + (ptw32_delete_thread_entry): Internal changes to avoid contention. + Calling routines changed accordingly. + + * pthread.h: Modified cleanup macros to use new generic push and pop. + Added destructor and atfork stacks to ptw32_threads_thread_t. + + * cleanup.c (ptw32_handler_push, ptw32_handler_pop, + ptw32_handler_pop_all): Renamed cleanup push and pop routines + and made generic to handle destructors and atfork handlers as + well. + + * create.c (ptw32_start_call): New function is a wrapper for + all new threads. It allows us to do some cleanup when the thread + returns, ie. that is otherwise only done if the thread is cancelled. + + * exit.c (ptw32_vacuum): New function contains code from + pthread_exit() that we need in the new ptw32_start_call() + as well. + + * implement.h: Various additions and minor changes. + + * pthread.h: Various additions and minor changes. + Change cleanup handler macros to use generic handler push and pop + functions. + + * attr.c: Minor mods to all functions. + (is_attr): Implemented missing function. + + * create.c (pthread_create): More clean up. + + * private.c (ptw32_find_thread_entry): Implement. + (ptw32_delete_thread_entry): Implement. + (ptw32_new_thread_entry): Implement. + These functions manipulate the implementations internal thread + table and are part of general code cleanup and modularisation. + They replace ptw32_getthreadindex() which was removed. + + * exit.c (pthread_exit): Changed to use the new code above. + + * pthread.h: Add cancelability constants. Update comments. + +1998-07-22 Ben Elliston <bje at cygnus.com> + + * attr.c (pthread_setstacksize): Update test of attr argument. + (pthread_getstacksize): Likewise. + (pthread_setstackaddr): Likewise. + (pthread_getstackaddr): Likewise. + (pthread_attr_init): No need to allocate any storage. + (pthread_attr_destroy): No need to free any storage. + + * mutex.c (is_attr): Not likely to be needed; remove. + (remove_attr): Likewise. + (insert_attr): Likewise. + + * implement.h (ptw32_mutexattr_t): Moved to a public definition + in pthread.h. There was little gain in hiding these details. + (ptw32_condattr_t): Likewise. + (ptw32_attr_t): Likewise. + + * pthread.h (pthread_atfork): Add function prototype. + (pthread_attr_t): Moved here from implement.h. + + * fork.c (pthread_atfork): Preliminary implementation. + (ptw32_fork): Likewise. + +Wed Jul 22 00:16:22 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * cleanup.c (ptw32_cleanup_push): Implement. + (ptw32_cleanup_pop): Implement. + (ptw32_do_cancellation): Implement. + These are private to the implementation. The real cleanup functions + are macros. See below. + + * pthread.h (pthread_cleanup_push): Implement as a macro. + (pthread_cleanup_pop): Implement as a macro. + Because these are macros which start and end a block, the POSIX scoping + requirement is observed. See the comment in the file. + + * exit.c (pthread_exit): Refine the code. + + * create.c (pthread_create): Code cleanup. + + * implement.h (RND_SIZEOF): Add RND_SIZEOF(T) to round sizeof(T) + up to multiple of DWORD. + Add function prototypes. + + * private.c (ptw32_getthreadindex): "*thread" should have been + "thread". Detect empty slot fail condition. + +1998-07-20 Ben Elliston <bje at cygnus.com> + + * misc.c (pthread_once): Implement. Don't use a per-application + flag and mutex--make `pthread_once_t' contain these elements in + their structure. The earlier version had incorrect semantics. + + * pthread.h (ptw32_once_flag): Add new variable. Remove. + (ptw32_once_lock): Add new mutex lock to ensure integrity of + access to ptw32_once_flag. Remove. + (pthread_once): Add function prototype. + (pthread_once_t): Define this type. + +Mon Jul 20 02:31:05 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * private.c (ptw32_getthreadindex): Implement. + + * pthread.h: Add application static data dependent on + _PTHREADS_BUILD_DLL define. This is needed to avoid allocating + non-sharable static data within the pthread DLL. + + * implement.h: Add ptw32_cleanup_stack_t, ptw32_cleanup_node_t + and PTW32_HASH_INDEX. + + * exit.c (pthread_exit): Begin work on cleanup and de-allocate + thread-private storage. + + * create.c (pthread_create): Add thread to thread table. + Keep a thread-private copy of the attributes with default values + filled in when necessary. Same for the cleanup stack. Make + pthread_create C run-time library friendly by using _beginthreadex() + instead of CreateThread(). Fix error returns. + +Sun Jul 19 16:26:23 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Rename pthreads_thread_count to ptw32_threads_count. + Create ptw32_threads_thread_t struct to keep thread specific data. + + * create.c: Rename pthreads_thread_count to ptw32_threads_count. + (pthread_create): Handle errors from CreateThread(). + +1998-07-19 Ben Elliston <bje at cygnus.com> + + * condvar.c (pthread_cond_wait): Generalise. Moved from here .. + (cond_wait): To here. + (pthread_cond_timedwait): Implement; use generalised cond_wait(). + + * pthread.h (pthread_key_t): Define this type. + (pthread_key_create): Add function prototype. + (pthread_setspecific): Likewise. + (pthread_getspecific): Likwise. + (pthread_key_delete): Likewise. + + * tsd.c (pthread_key_create): Implement. + (pthread_setspecific): Likewise. + (pthread_getspecific): Likewise. + (pthread_key_delete): Likewise. + + * mutex.c (pthread_mutex_trylock): Return ENOSYS if this function + is called on a Win32 platform which is not Windows NT. + +1998-07-18 Ben Elliston <bje at cygnus.com> + + * condvar.c (pthread_condattr_init): Do not attempt to malloc any + storage; none is needed now that condattr_t is an empty struct. + (pthread_condattr_destory): Likewise; do not free storage. + (pthread_condattr_setpshared): No longer supported; return ENOSYS. + (pthread_condattr_getpshared): Likewise. + (pthread_cond_init): Implement with help from Douglas Schmidt. + Remember to initialise the cv's internal mutex. + (pthread_cond_wait): Likewise. + (pthread_cond_signal): Likewise. + (pthread_cond_broadcast): Likewise. + (pthread_cond_timedwait): Preliminary implementation, but I need + to see some API documentation for `WaitForMultipleObject'. + (pthread_destory): Implement. + + * pthread.h (pthread_cond_init): Add function protoype. + (pthread_cond_broadcast): Likewise. + (pthread_cond_signal): Likewise. + (pthread_cond_timedwait): Likewise. + (pthread_cond_wait): Likewise. + (pthread_cond_destroy): Likewise. + (pthread_cond_t): Define this type. Fix for u_int. Do not assume + that the mutex contained withing the pthread_cond_t structure will + be a critical section. Use our new POSIX type! + + * implement.h (ptw32_condattr_t): Remove shared attribute. + +1998-07-17 Ben Elliston <bje at cygnus.com> + + * pthread.h (PTHREADS_PROCESS_PRIVATE): Remove. + (PTHREAD_PROCESS_SHARED): Likewise. No support for mutexes shared + across processes for now. + (pthread_mutex_t): Use a Win32 CRITICAL_SECTION type for better + performance. + + * implement.h (ptw32_mutexattr_t): Remove shared attribute. + + * mutex.c (pthread_mutexattr_setpshared): This optional function + is no longer supported, since we want to implement POSIX mutex + variables using the much more efficient Win32 critical section + primitives. Critical section objects in Win32 cannot be shared + between processes. + (pthread_mutexattr_getpshared): Likewise. + (pthread_mutexattr_init): No need to malloc any storage; the + attributes structure is now empty. + (pthread_mutexattr_destroy): This is now a nop. + (pthread_mutex_init): Use InitializeCriticalSection(). + (pthread_mutex_destroy): Use DeleteCriticalSection(). + (pthread_mutex_lock): Use EnterCriticalSection(). + (pthread_mutex_trylock): Use TryEnterCriticalSection(). This is + not supported by Windows 9x, but trylock is a hack anyway, IMHO. + (pthread_mutex_unlock): Use LeaveCriticalSection(). + +1998-07-14 Ben Elliston <bje at cygnus.com> + + * attr.c (pthread_attr_setstacksize): Implement. + (pthread_attr_getstacksize): Likewise. + (pthread_attr_setstackaddr): Likewise. + (pthread_attr_getstackaddr): Likewise. + (pthread_attr_init): Likewise. + (pthread_attr_destroy): Likewise. + + * condvar.c (pthread_condattr_init): Add `_cond' to function name. + + * mutex.c (pthread_mutex_lock): Add `_mutex' to function name. + (pthread_mutex_trylock): Likewise. + (pthread_mutex_unlock): Likewise. + + * pthread.h (pthread_condattr_setpshared): Fix typo. + (pthread_attr_init): Add function prototype. + (pthread_attr_destroy): Likewise. + (pthread_attr_setstacksize): Likewise. + (pthread_attr_getstacksize): Likewise. + (pthread_attr_setstackaddr): Likewise. + (pthread_attr_getstackaddr): Likewise. + +Mon Jul 13 01:09:55 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Wrap in #ifndef _IMPLEMENT_H + + * create.c (pthread_create): Map stacksize attr to Win32. + + * mutex.c: Include implement.h + +1998-07-13 Ben Elliston <bje at cygnus.com> + + * condvar.c (pthread_condattr_init): Implement. + (pthread_condattr_destroy): Likewise. + (pthread_condattr_setpshared): Likewise. + (pthread_condattr_getpshared): Likewise. + + * implement.h (PTHREAD_THREADS_MAX): Remove trailing semicolon. + (PTHREAD_STACK_MIN): Specify; needs confirming. + (ptw32_attr_t): Define this type. + (ptw32_condattr_t): Likewise. + + * pthread.h (pthread_mutex_t): Define this type. + (pthread_condattr_t): Likewise. + (pthread_mutex_destroy): Add function prototype. + (pthread_lock): Likewise. + (pthread_trylock): Likewise. + (pthread_unlock): Likewise. + (pthread_condattr_init): Likewise. + (pthread_condattr_destroy): Likewise. + (pthread_condattr_setpshared): Likewise. + (pthread_condattr_getpshared): Likewise. + + * mutex.c (pthread_mutex_init): Implement. + (pthread_mutex_destroy): Likewise. + (pthread_lock): Likewise. + (pthread_trylock): Likewise. + (pthread_unlock): Likewise. + +1998-07-12 Ben Elliston <bje at cygnus.com> + + * implement.h (ptw32_mutexattr_t): Define this implementation + internal type. Application programmers only see a mutex attribute + object as a void pointer. + + * pthread.h (pthread_mutexattr_t): Define this type. + (pthread_mutexattr_init): Add function prototype. + (pthread_mutexattr_destroy): Likewise. + (pthread_mutexattr_setpshared): Likewise. + (pthread_mutexattr_getpshared): Likewise. + (pthread_mutexattr_setprotocol): Likewise. + (pthread_mutexattr_getprotocol): Likewise. + (pthread_mutexattr_setprioceiling): Likewise. + (pthread_mutexattr_getprioceiling): Likewise. + (PTHREAD_PROCESS_PRIVATE): Define. + (PTHREAD_PROCESS_SHARED): Define. + + * mutex.c (pthread_mutexattr_init): Implement. + (pthread_mutexattr_destroy): Implement. + (pthread_mutexattr_setprotocol): Implement. + (pthread_mutexattr_getprotocol): Likewise. + (pthread_mutexattr_setprioceiling): Likewise. + (pthread_mutexattr_getprioceiling): Likewise. + (pthread_mutexattr_setpshared): Likewise. + (pthread_mutexattr_getpshared): Likewise. + (insert_attr): New function; very preliminary implementation! + (is_attr): Likewise. + (remove_attr): Likewise. + +Sat Jul 11 14:48:54 1998 Ross Johnson <rpj at ixobrychus.canberra.edu.au> + + * implement.h: Preliminary implementation specific defines. + + * create.c (pthread_create): Preliminary implementation. + +1998-07-11 Ben Elliston <bje at cygnus.com> + + * sync.c (pthread_join): Implement. + + * misc.c (pthread_equal): Likewise. + + * pthread.h (pthread_join): Add function prototype. + (pthread_equal): Likewise. + +1998-07-10 Ben Elliston <bje at cygnus.com> + + * misc.c (pthread_self): Implement. + + * exit.c (pthread_exit): Implement. + + * pthread.h (pthread_exit): Add function prototype. + (pthread_self): Likewise. + (pthread_t): Define this type. + +1998-07-09 Ben Elliston <bje at cygnus.com> + + * create.c (pthread_create): A dummy stub right now. + + * pthread.h (pthread_create): Add function prototype. |