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/*
* pthread_setname_np.c
*
* --------------------------------------------------------------------------
*
* 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 <stdio.h>
#include <string.h>
#include "pthread.h"
#include "implement.h"
#if defined(_MSC_VER)
#define MS_VC_EXCEPTION 0x406D1388
#pragma pack(push,8)
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} THREADNAME_INFO;
#pragma pack(pop)
void
SetThreadName( DWORD dwThreadID, char* threadName)
{
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = threadName;
info.dwThreadID = dwThreadID;
info.dwFlags = 0;
__try
{
RaiseException( MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), (ULONG_PTR*)&info );
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
}
}
#endif
#if defined(PTW32_COMPATIBILITY_BSD) || defined(PTW32_COMPATIBILITY_TRU64)
int
pthread_setname_np(pthread_t thr, const char *name, void *arg)
{
ptw32_mcs_local_node_t threadLock;
int len;
int result;
char tmpbuf[PTHREAD_MAX_NAMELEN_NP];
char * newname;
char * oldname;
ptw32_thread_t * tp;
#if defined(_MSC_VER)
DWORD Win32ThreadID;
#endif
/*
* Validate the thread id. This method works for Pthreads4w because
* pthread_kill and pthread_t are designed to accommodate it, but the
* method is not portable.
*/
result = pthread_kill (thr, 0);
if (0 != result)
{
return result;
}
/*
* According to the MSDN description for snprintf()
* where count is the second parameter:
* If len < count, then len characters are stored in buffer, a null-terminator is appended, and len is returned.
* If len = count, then len characters are stored in buffer, no null-terminator is appended, and len is returned.
* If len > count, then count characters are stored in buffer, no null-terminator is appended, and a negative value is returned.
*
* This is different to the POSIX behaviour which returns the number of characters that would have been written in all cases.
*/
len = snprintf(tmpbuf, PTHREAD_MAX_NAMELEN_NP-1, name, arg);
tmpbuf[PTHREAD_MAX_NAMELEN_NP-1] = '\0';
if (len < 0)
{
return EINVAL;
}
newname = _strdup(tmpbuf);
#if defined(_MSC_VER)
Win32ThreadID = pthread_getw32threadid_np (thr);
if (Win32ThreadID)
{
SetThreadName(Win32ThreadID, newname);
}
#endif
tp = (ptw32_thread_t *) thr.p;
ptw32_mcs_lock_acquire (&tp->threadLock, &threadLock);
oldname = tp->name;
tp->name = newname;
if (oldname)
{
free(oldname);
}
ptw32_mcs_lock_release (&threadLock);
return 0;
}
#else
int
pthread_setname_np(pthread_t thr, const char *name)
{
ptw32_mcs_local_node_t threadLock;
int result;
char * newname;
char * oldname;
ptw32_thread_t * tp;
#if defined(_MSC_VER)
DWORD Win32ThreadID;
#endif
/*
* Validate the thread id. This method works for Pthreads4w because
* pthread_kill and pthread_t are designed to accommodate it, but the
* method is not portable.
*/
result = pthread_kill (thr, 0);
if (0 != result)
{
return result;
}
newname = _strdup(name);
#if defined(_MSC_VER)
Win32ThreadID = pthread_getw32threadid_np (thr);
if (Win32ThreadID)
{
SetThreadName(Win32ThreadID, newname);
}
#endif
tp = (ptw32_thread_t *) thr.p;
ptw32_mcs_lock_acquire (&tp->threadLock, &threadLock);
oldname = tp->name;
tp->name = newname;
if (oldname)
{
free(oldname);
}
ptw32_mcs_lock_release (&threadLock);
return 0;
}
#endif
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