/*
* pthread_win32_attach_detach_np.c
*
* Description:
* This translation unit implements non-portable thread functions.
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2005 Pthreads-win32 contributors
*
* Contact Email: rpj@callisto.canberra.edu.au
*
* 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:
* http://sources.redhat.com/pthreads-win32/contributors.html
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library in the file COPYING.LIB;
* if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include "pthread.h"
#include "implement.h"
/*
* Handle to quserex.dll
*/
static HINSTANCE ptw32_h_quserex;
BOOL
pthread_win32_process_attach_np ()
{
TCHAR QuserExDLLPathBuf[1024];
BOOL result = TRUE;
result = ptw32_processInitialize ();
#if defined(_UWIN)
pthread_count++;
#endif
#if defined(__GNUC__)
ptw32_features = 0;
#else
/*
* This is obsolete now.
*/
ptw32_features = PTW32_SYSTEM_INTERLOCKED_COMPARE_EXCHANGE;
#endif
/*
* Load QUSEREX.DLL and try to get address of QueueUserAPCEx.
* Because QUSEREX.DLL requires a driver to be installed we will
* assume the DLL is in the system directory.
*
* This should take care of any security issues.
*/
#if defined(__GNUC__) || _MSC_VER < 1400
if(GetSystemDirectory(QuserExDLLPathBuf, sizeof(QuserExDLLPathBuf)))
{
(void) strncat(QuserExDLLPathBuf,
"\\QUSEREX.DLL",
sizeof(QuserExDLLPathBuf) - strlen(QuserExDLLPathBuf) - 1);
ptw32_h_quserex = LoadLibrary(QuserExDLLPathBuf);
}
#else
/* strncat is secure - this is just to avoid a warning */
if(GetSystemDirectory(QuserExDLLPathBuf, sizeof(QuserExDLLPathBuf)) &&
0 == strncat_s(QuserExDLLPathBuf, sizeof(QuserExDLLPathBuf), "\\QUSEREX.DLL", 12))
{
ptw32_h_quserex = LoadLibrary(QuserExDLLPathBuf);
}
#endif
if (ptw32_h_quserex != NULL)
{
ptw32_register_cancelation = (DWORD (*)(PAPCFUNC, HANDLE, DWORD))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress (ptw32_h_quserex,
(const TCHAR *) TEXT ("QueueUserAPCEx"));
#else
GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx");
#endif
}
if (NULL == ptw32_register_cancelation)
{
ptw32_register_cancelation = ptw32_RegisterCancelation;
if (ptw32_h_quserex != NULL)
{
(void) FreeLibrary (ptw32_h_quserex);
}
ptw32_h_quserex = 0;
}
else
{
/* Initialise QueueUserAPCEx */
BOOL (*queue_user_apc_ex_init) (VOID);
queue_user_apc_ex_init = (BOOL (*)(VOID))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress (ptw32_h_quserex,
(const TCHAR *) TEXT ("QueueUserAPCEx_Init"));
#else
GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Init");
#endif
if (queue_user_apc_ex_init == NULL || !queue_user_apc_ex_init ())
{
ptw32_register_cancelation = ptw32_RegisterCancelation;
(void) FreeLibrary (ptw32_h_quserex);
ptw32_h_quserex = 0;
}
}
if (ptw32_h_quserex)
{
ptw32_features |= PTW32_ALERTABLE_ASYNC_CANCEL;
}
return result;
}
BOOL
pthread_win32_process_detach_np ()
{
if (ptw32_processInitialized)
{
ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
if (sp != NULL)
{
/*
* Detached threads have their resources automatically
* cleaned up upon exit (others must be 'joined').
*/
if (sp->detachState == PTHREAD_CREATE_DETACHED)
{
ptw32_threadDestroy (sp->ptHandle);
TlsSetValue (ptw32_selfThreadKey->key, NULL);
}
}
/*
* The DLL is being unmapped from the process's address space
*/
ptw32_processTerminate ();
if (ptw32_h_quserex)
{
/* Close QueueUserAPCEx */
BOOL (*queue_user_apc_ex_fini) (VOID);
queue_user_apc_ex_fini = (BOOL (*)(VOID))
#if defined(NEED_UNICODE_CONSTS)
GetProcAddress (ptw32_h_quserex,
(const TCHAR *) TEXT ("QueueUserAPCEx_Fini"));
#else
GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Fini");
#endif
if (queue_user_apc_ex_fini != NULL)
{
(void) queue_user_apc_ex_fini ();
}
(void) FreeLibrary (ptw32_h_quserex);
}
}
return TRUE;
}
BOOL
pthread_win32_thread_attach_np ()
{
return TRUE;
}
BOOL
pthread_win32_thread_detach_np ()
{
if (ptw32_processInitialized)
{
/*
* Don't use pthread_self() - to avoid creating an implicit POSIX thread handle
* unnecessarily.
*/
ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
if (sp != NULL) // otherwise Win32 thread with no implicit POSIX handle.
{
ptw32_mcs_local_node_t stateLock;
ptw32_callUserDestroyRoutines (sp->ptHandle);
ptw32_mcs_lock_acquire (&sp->stateLock, &stateLock);
sp->state = PThreadStateLast;
/*
* If the thread is joinable at this point then it MUST be joined
* or detached explicitly by the application.
*/
ptw32_mcs_lock_release (&stateLock);
/*
* Robust Mutexes
*/
while (sp->robustMxList != NULL)
{
pthread_mutex_t mx = sp->robustMxList->mx;
ptw32_robust_mutex_remove(&mx, sp);
(void) PTW32_INTERLOCKED_EXCHANGE_LONG(
(PTW32_INTERLOCKED_LONGPTR)&mx->robustNode->stateInconsistent,
(PTW32_INTERLOCKED_LONG)-1);
/*
* If there are no waiters then the next thread to block will
* sleep, wakeup immediately and then go back to sleep.
* See pthread_mutex_lock.c.
*/
SetEvent(mx->event);
}
if (sp->detachState == PTHREAD_CREATE_DETACHED)
{
ptw32_threadDestroy (sp->ptHandle);
TlsSetValue (ptw32_selfThreadKey->key, NULL);
}
}
}
return TRUE;
}
BOOL
pthread_win32_test_features_np (int feature_mask)
{
return ((ptw32_features & feature_mask) == feature_mask);
}