259 lines
6.9 KiB
C
259 lines
6.9 KiB
C
/*
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* pthread_win32_attach_detach_np.c
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*
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* Description:
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* This translation unit implements non-portable thread functions.
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "pthread.h"
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#include "implement.h"
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#include <tchar.h>
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/*
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* Handle to quserex.dll
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*/
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static HINSTANCE ptw32_h_quserex;
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BOOL
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pthread_win32_process_attach_np ()
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{
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TCHAR QuserExDLLPathBuf[1024];
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BOOL result = TRUE;
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result = ptw32_processInitialize ();
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#if defined(_UWIN)
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pthread_count++;
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#endif
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#if defined(__GNUC__)
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ptw32_features = 0;
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#else
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/*
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* This is obsolete now.
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*/
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ptw32_features = PTW32_SYSTEM_INTERLOCKED_COMPARE_EXCHANGE;
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#endif
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/*
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* Load QUSEREX.DLL and try to get address of QueueUserAPCEx.
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* Because QUSEREX.DLL requires a driver to be installed we will
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* assume the DLL is in the system directory.
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*
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* This should take care of any security issues.
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*/
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#if defined(__GNUC__) || _MSC_VER < 1400
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if(GetSystemDirectory(QuserExDLLPathBuf, sizeof(QuserExDLLPathBuf)))
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{
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(void) strncat(QuserExDLLPathBuf,
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"\\QUSEREX.DLL",
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sizeof(QuserExDLLPathBuf) - strlen(QuserExDLLPathBuf) - 1);
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ptw32_h_quserex = LoadLibrary(QuserExDLLPathBuf);
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}
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#else
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/* strncat is secure - this is just to avoid a warning */
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if(GetSystemDirectory(QuserExDLLPathBuf, sizeof(QuserExDLLPathBuf) / sizeof(TCHAR)) &&
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0 == _tcsncat_s(QuserExDLLPathBuf, sizeof(QuserExDLLPathBuf) / sizeof(TCHAR), TEXT("\\QUSEREX.DLL"), 12))
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{
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ptw32_h_quserex = LoadLibrary(QuserExDLLPathBuf);
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}
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#endif
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if (ptw32_h_quserex != NULL)
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{
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ptw32_register_cancelation = (DWORD (*)(PAPCFUNC, HANDLE, DWORD))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_quserex,
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(const TCHAR *) TEXT ("QueueUserAPCEx"));
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#else
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GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx");
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#endif
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}
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if (NULL == ptw32_register_cancelation)
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{
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ptw32_register_cancelation = ptw32_RegisterCancelation;
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if (ptw32_h_quserex != NULL)
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{
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(void) FreeLibrary (ptw32_h_quserex);
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}
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ptw32_h_quserex = 0;
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}
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else
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{
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/* Initialise QueueUserAPCEx */
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BOOL (*queue_user_apc_ex_init) (VOID);
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queue_user_apc_ex_init = (BOOL (*)(VOID))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_quserex,
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(const TCHAR *) TEXT ("QueueUserAPCEx_Init"));
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#else
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GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Init");
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#endif
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if (queue_user_apc_ex_init == NULL || !queue_user_apc_ex_init ())
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{
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ptw32_register_cancelation = ptw32_RegisterCancelation;
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(void) FreeLibrary (ptw32_h_quserex);
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ptw32_h_quserex = 0;
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}
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}
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if (ptw32_h_quserex)
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{
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ptw32_features |= PTW32_ALERTABLE_ASYNC_CANCEL;
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}
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return result;
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}
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BOOL
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pthread_win32_process_detach_np ()
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{
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if (ptw32_processInitialized)
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{
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ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
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if (sp != NULL)
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{
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/*
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* Detached threads have their resources automatically
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* cleaned up upon exit (others must be 'joined').
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*/
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if (sp->detachState == PTHREAD_CREATE_DETACHED)
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{
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ptw32_threadDestroy (sp->ptHandle);
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TlsSetValue (ptw32_selfThreadKey->key, NULL);
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}
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}
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/*
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* The DLL is being unmapped from the process's address space
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*/
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ptw32_processTerminate ();
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if (ptw32_h_quserex)
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{
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/* Close QueueUserAPCEx */
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BOOL (*queue_user_apc_ex_fini) (VOID);
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queue_user_apc_ex_fini = (BOOL (*)(VOID))
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#if defined(NEED_UNICODE_CONSTS)
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GetProcAddress (ptw32_h_quserex,
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(const TCHAR *) TEXT ("QueueUserAPCEx_Fini"));
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#else
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GetProcAddress (ptw32_h_quserex, (LPCSTR) "QueueUserAPCEx_Fini");
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#endif
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if (queue_user_apc_ex_fini != NULL)
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{
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(void) queue_user_apc_ex_fini ();
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}
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(void) FreeLibrary (ptw32_h_quserex);
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}
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}
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return TRUE;
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}
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BOOL
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pthread_win32_thread_attach_np ()
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{
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return TRUE;
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}
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BOOL
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pthread_win32_thread_detach_np ()
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{
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if (ptw32_processInitialized)
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{
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/*
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* Don't use pthread_self() - to avoid creating an implicit POSIX thread handle
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* unnecessarily.
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*/
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ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey);
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if (sp != NULL) // otherwise Win32 thread with no implicit POSIX handle.
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{
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ptw32_mcs_local_node_t stateLock;
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ptw32_callUserDestroyRoutines (sp->ptHandle);
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ptw32_mcs_lock_acquire (&sp->stateLock, &stateLock);
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sp->state = PThreadStateLast;
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/*
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* If the thread is joinable at this point then it MUST be joined
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* or detached explicitly by the application.
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*/
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ptw32_mcs_lock_release (&stateLock);
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/*
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* Robust Mutexes
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*/
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while (sp->robustMxList != NULL)
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{
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pthread_mutex_t mx = sp->robustMxList->mx;
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ptw32_robust_mutex_remove(&mx, sp);
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(void) PTW32_INTERLOCKED_EXCHANGE_LONG(
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(PTW32_INTERLOCKED_LONGPTR)&mx->robustNode->stateInconsistent,
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(PTW32_INTERLOCKED_LONG)-1);
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/*
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* If there are no waiters then the next thread to block will
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* sleep, wakeup immediately and then go back to sleep.
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* See pthread_mutex_lock.c.
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*/
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SetEvent(mx->event);
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}
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if (sp->detachState == PTHREAD_CREATE_DETACHED)
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{
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ptw32_threadDestroy (sp->ptHandle);
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TlsSetValue (ptw32_selfThreadKey->key, NULL);
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}
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}
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}
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return TRUE;
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}
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BOOL
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pthread_win32_test_features_np (int feature_mask)
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{
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return ((ptw32_features & feature_mask) == feature_mask);
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}
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