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Diffstat (limited to 'pthreads/src/sem_post_multiple.c')
| -rw-r--r-- | pthreads/src/sem_post_multiple.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/pthreads/src/sem_post_multiple.c b/pthreads/src/sem_post_multiple.c deleted file mode 100644 index 44c168c..0000000 --- a/pthreads/src/sem_post_multiple.c +++ /dev/null @@ -1,142 +0,0 @@ -/* - * ------------------------------------------------------------- - * - * Module: sem_post_multiple.c - * - * Purpose: - * Semaphores aren't actually part of the PThreads standard. - * They are defined by the POSIX Standard: - * - * POSIX 1003.1b-1993 (POSIX.1b) - * - * ------------------------------------------------------------- - * - * -------------------------------------------------------------------------- - * - * 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 "semaphore.h" -#include "implement.h" - - -int -sem_post_multiple (sem_t * sem, int count) - /* - * ------------------------------------------------------ - * DOCPUBLIC - * This function posts multiple wakeups to a semaphore. - * - * PARAMETERS - * sem - * pointer to an instance of sem_t - * - * count - * counter, must be greater than zero. - * - * DESCRIPTION - * This function posts multiple wakeups to a semaphore. If there - * are waiting threads (or processes), n <= count are awakened; - * the semaphore value is incremented by count - n. - * - * RESULTS - * 0 successfully posted semaphore, - * -1 failed, error in errno - * ERRNO - * EINVAL 'sem' is not a valid semaphore - * or count is less than or equal to zero. - * ERANGE semaphore count is too big - * - * ------------------------------------------------------ - */ -{ - int result = 0; - long waiters; - sem_t s = *sem; - - if (s == NULL || count <= 0) - { - result = EINVAL; - } - else if ((result = pthread_mutex_lock (&s->lock)) == 0) - { - /* See sem_destroy.c - */ - if (*sem == NULL) - { - (void) pthread_mutex_unlock (&s->lock); - result = EINVAL; - return -1; - } - - if (s->value <= (SEM_VALUE_MAX - count)) - { - waiters = -s->value; - s->value += count; - if (waiters > 0) - { -#if defined(NEED_SEM) - if (SetEvent(s->sem)) - { - waiters--; - s->leftToUnblock += count - 1; - if (s->leftToUnblock > waiters) - { - s->leftToUnblock = waiters; - } - } -#else - if (ReleaseSemaphore (s->sem, (waiters<=count)?waiters:count, 0)) - { - /* No action */ - } -#endif - else - { - s->value -= count; - result = EINVAL; - } - } - } - else - { - result = ERANGE; - } - (void) pthread_mutex_unlock (&s->lock); - } - - if (result != 0) - { - errno = result; - return -1; - } - - return 0; - -} /* sem_post_multiple */ |