diff options
Diffstat (limited to 'pthreads/src/pthread_mutex_unlock.c')
| -rw-r--r-- | pthreads/src/pthread_mutex_unlock.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/pthreads/src/pthread_mutex_unlock.c b/pthreads/src/pthread_mutex_unlock.c deleted file mode 100644 index 3d65d1a..0000000 --- a/pthreads/src/pthread_mutex_unlock.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * pthread_mutex_unlock.c - * - * Description: - * This translation unit implements mutual exclusion (mutex) primitives. - * - * -------------------------------------------------------------------------- - * - * 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" - - -int -pthread_mutex_unlock (pthread_mutex_t * mutex) -{ - int result = 0; - int kind; - pthread_mutex_t mx; - - /* - * Let the system deal with invalid pointers. - */ - - mx = *mutex; - - /* - * If the thread calling us holds the mutex then there is no - * race condition. If another thread holds the - * lock then we shouldn't be in here. - */ - if (mx < PTHREAD_ERRORCHECK_MUTEX_INITIALIZER) - { - kind = mx->kind; - - if (kind >= 0) - { - if (kind == PTHREAD_MUTEX_NORMAL) - { - LONG idx; - - idx = (LONG) PTW32_INTERLOCKED_EXCHANGE_LONG ((PTW32_INTERLOCKED_LONGPTR)&mx->lock_idx, - (PTW32_INTERLOCKED_LONG)0); - if (idx != 0) - { - if (idx < 0) - { - /* - * Someone may be waiting on that mutex. - */ - if (SetEvent (mx->event) == 0) - { - result = EINVAL; - } - } - } - } - else - { - if (pthread_equal (mx->ownerThread, pthread_self())) - { - if (kind != PTHREAD_MUTEX_RECURSIVE - || 0 == --mx->recursive_count) - { - mx->ownerThread.p = NULL; - - if ((LONG) PTW32_INTERLOCKED_EXCHANGE_LONG ((PTW32_INTERLOCKED_LONGPTR)&mx->lock_idx, - (PTW32_INTERLOCKED_LONG)0) < 0L) - { - /* Someone may be waiting on that mutex */ - if (SetEvent (mx->event) == 0) - { - result = EINVAL; - } - } - } - } - else - { - result = EPERM; - } - } - } - else - { - /* Robust types */ - pthread_t self = pthread_self(); - kind = -kind - 1; /* Convert to non-robust range */ - - /* - * The thread must own the lock regardless of type if the mutex - * is robust. - */ - if (pthread_equal (mx->ownerThread, self)) - { - PTW32_INTERLOCKED_COMPARE_EXCHANGE_LONG((PTW32_INTERLOCKED_LONGPTR) &mx->robustNode->stateInconsistent, - (PTW32_INTERLOCKED_LONG)PTW32_ROBUST_NOTRECOVERABLE, - (PTW32_INTERLOCKED_LONG)PTW32_ROBUST_INCONSISTENT); - if (PTHREAD_MUTEX_NORMAL == kind) - { - ptw32_robust_mutex_remove(mutex, NULL); - - if ((LONG) PTW32_INTERLOCKED_EXCHANGE_LONG((PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) 0) < 0) - { - /* - * Someone may be waiting on that mutex. - */ - if (SetEvent (mx->event) == 0) - { - result = EINVAL; - } - } - } - else - { - if (kind != PTHREAD_MUTEX_RECURSIVE - || 0 == --mx->recursive_count) - { - ptw32_robust_mutex_remove(mutex, NULL); - - if ((LONG) PTW32_INTERLOCKED_EXCHANGE_LONG((PTW32_INTERLOCKED_LONGPTR) &mx->lock_idx, - (PTW32_INTERLOCKED_LONG) 0) < 0) - { - /* - * Someone may be waiting on that mutex. - */ - if (SetEvent (mx->event) == 0) - { - result = EINVAL; - } - } - } - } - } - else - { - result = EPERM; - } - } - } - else if (mx != PTHREAD_MUTEX_INITIALIZER) - { - result = EINVAL; - } - - return (result); -} |