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Diffstat (limited to 'pthreads/src/ptw32_semwait.c')
| -rw-r--r-- | pthreads/src/ptw32_semwait.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/pthreads/src/ptw32_semwait.c b/pthreads/src/ptw32_semwait.c deleted file mode 100644 index c3c4fd0..0000000 --- a/pthreads/src/ptw32_semwait.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * ptw32_semwait.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 - */ - -#if !defined(_UWIN) -/*# include <process.h> */ -#endif -#include "pthread.h" -#include "implement.h" - - -int -ptw32_semwait (sem_t * sem) - /* - * ------------------------------------------------------ - * DESCRIPTION - * This function waits on a POSIX semaphore. If the - * semaphore value is greater than zero, it decreases - * its value by one. If the semaphore value is zero, then - * the calling thread (or process) is blocked until it can - * successfully decrease the value. - * - * Unlike sem_wait(), this routine is non-cancelable. - * - * RESULTS - * 0 successfully decreased semaphore, - * -1 failed, error in errno. - * ERRNO - * EINVAL 'sem' is not a valid semaphore, - * ENOSYS semaphores are not supported, - * EINTR the function was interrupted by a signal, - * EDEADLK a deadlock condition was detected. - * - * ------------------------------------------------------ - */ -{ - int result = 0; - sem_t s = *sem; - - if (s == NULL) - { - result = EINVAL; - } - else - { - if ((result = pthread_mutex_lock (&s->lock)) == 0) - { - int v; - - /* See sem_destroy.c - */ - if (*sem == NULL) - { - (void) pthread_mutex_unlock (&s->lock); - errno = EINVAL; - return -1; - } - - v = --s->value; - (void) pthread_mutex_unlock (&s->lock); - - if (v < 0) - { - /* Must wait */ - if (WaitForSingleObject (s->sem, INFINITE) == WAIT_OBJECT_0) - { -#if defined(NEED_SEM) - if (pthread_mutex_lock (&s->lock) == 0) - { - if (*sem == NULL) - { - (void) pthread_mutex_unlock (&s->lock); - errno = EINVAL; - return -1; - } - - if (s->leftToUnblock > 0) - { - --s->leftToUnblock; - SetEvent(s->sem); - } - (void) pthread_mutex_unlock (&s->lock); - } -#endif - return 0; - } - } - else - { - return 0; - } - } - } - - if (result != 0) - { - errno = result; - return -1; - } - - return 0; - -} /* ptw32_semwait */ |