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/*
* dll.c
*
* Description:
* This translation unit implements DLL initialisation.
*
* --------------------------------------------------------------------------
*
* Pthreads4w - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999-2018, Pthreads4w contributors
*
* Homepage: https://sourceforge.net/projects/pthreads4w/
*
* The current list of contributors is contained
* in the file CONTRIBUTORS included with the source
* code distribution. The list can also be seen at the
* following World Wide Web location:
* https://sourceforge.net/p/pthreads4w/wiki/Contributors/
*
* This file is part of Pthreads4w.
*
* Pthreads4w is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pthreads4w is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pthreads4w. If not, see <http://www.gnu.org/licenses/>. *
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "pthread.h"
#include "implement.h"
#if !defined(PTW32_STATIC_LIB)
#if defined(_MSC_VER)
/*
* lpvReserved yields an unreferenced formal parameter;
* ignore it
*/
#pragma warning( disable : 4100 )
#endif
#if defined(__cplusplus)
/*
* Dear c++: Please don't mangle this name. -thanks
*/
extern "C"
#endif /* __cplusplus */
BOOL WINAPI DllMain (HINSTANCE hinstDll, DWORD fdwReason, LPVOID lpvReserved)
{
BOOL result = PTW32_TRUE;
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
result = pthread_win32_process_attach_np ();
break;
case DLL_THREAD_ATTACH:
/*
* A thread is being created
*/
result = pthread_win32_thread_attach_np ();
break;
case DLL_THREAD_DETACH:
/*
* A thread is exiting cleanly
*/
result = pthread_win32_thread_detach_np ();
break;
case DLL_PROCESS_DETACH:
(void) pthread_win32_thread_detach_np ();
result = pthread_win32_process_detach_np ();
break;
}
return (result);
} /* DllMain */
#endif /* !PTW32_STATIC_LIB */
#if ! defined(PTW32_BUILD_INLINED)
/*
* Avoid "translation unit is empty" warnings
*/
typedef int foo;
#endif
#if defined(PTW32_STATIC_LIB)
/*
* Note: MSVC 8 and higher use code in dll.c, which enables TLS cleanup
* on thread exit. Code here can only do process init and exit functions.
*/
#if defined(__MINGW32__) || defined(_MSC_VER)
/* For an explanation of this code (at least the MSVC parts), refer to
*
* http://www.codeguru.com/cpp/misc/misc/threadsprocesses/article.php/c6945/
* ("Running Code Before and After Main")
*
* Compatibility with MSVC8 was cribbed from Boost:
*
* http://svn.boost.org/svn/boost/trunk/libs/thread/src/win32/tss_pe.cpp
*
* In addition to that, because we are in a static library, and the linker
* can't tell that the constructor/destructor functions are actually
* needed, we need a way to prevent the linker from optimizing away this
* module. The pthread_win32_autostatic_anchor() hack below (and in
* implement.h) does the job in a portable manner.
*/
static int on_process_init(void)
{
pthread_win32_process_attach_np ();
return 0;
}
static int on_process_exit(void)
{
pthread_win32_thread_detach_np ();
pthread_win32_process_detach_np ();
return 0;
}
#if defined(__GNUC__)
__attribute__((section(".ctors"), used)) static int (*gcc_ctor)(void) = on_process_init;
__attribute__((section(".dtors"), used)) static int (*gcc_dtor)(void) = on_process_exit;
#elif defined(_MSC_VER)
# if _MSC_VER >= 1400 /* MSVC8+ */
# pragma section(".CRT$XCU", long, read)
# pragma section(".CRT$XPU", long, read)
__declspec(allocate(".CRT$XCU")) static int (*msc_ctor)(void) = on_process_init;
__declspec(allocate(".CRT$XPU")) static int (*msc_dtor)(void) = on_process_exit;
# else
# pragma data_seg(".CRT$XCU")
static int (*msc_ctor)(void) = on_process_init;
# pragma data_seg(".CRT$XPU")
static int (*msc_dtor)(void) = on_process_exit;
# pragma data_seg() /* reset data segment */
# endif
#endif
#endif /* defined(__MINGW32__) || defined(_MSC_VER) */
/* This dummy function exists solely to be referenced by other modules
* (specifically, in implement.h), so that the linker can't optimize away
* this module. Don't call it.
*/
void ptw32_autostatic_anchor(void) { abort(); }
#endif /* PTW32_STATIC_LIB */
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