123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778 |
- /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C 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 2.1 of the License, or (at your option) any later version.
- The GNU C 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 the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #ifndef _SEMAPHORE_H
- #define _SEMAPHORE_H 1
- #include <features.h>
- #include <sys/types.h>
- #ifdef __USE_XOPEN2K
- # define __need_timespec
- # include <time.h>
- #endif
- /* Get the definition for sem_t. */
- #include <bits/semaphore.h>
- __BEGIN_DECLS
- /* Initialize semaphore object SEM to VALUE. If PSHARED then share it
- with other processes. */
- extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value)
- __THROW;
- /* Free resources associated with semaphore object SEM. */
- extern int sem_destroy (sem_t *__sem) __THROW;
- /* Open a named semaphore NAME with open flags OFLAG. */
- extern sem_t *sem_open (const char *__name, int __oflag, ...) __THROW;
- /* Close descriptor for named semaphore SEM. */
- extern int sem_close (sem_t *__sem) __THROW;
- /* Remove named semaphore NAME. */
- extern int sem_unlink (const char *__name) __THROW;
- /* Wait for SEM being posted.
- This function is a cancellation point and therefore not marked with
- __THROW. */
- extern int sem_wait (sem_t *__sem);
- #ifdef __USE_XOPEN2K
- /* Similar to `sem_wait' but wait only until ABSTIME.
- This function is a cancellation point and therefore not marked with
- __THROW. */
- extern int sem_timedwait (sem_t *__restrict __sem,
- const struct timespec *__restrict __abstime);
- #endif
- /* Test whether SEM is posted. */
- extern int sem_trywait (sem_t *__sem) __THROW;
- /* Post SEM. */
- extern int sem_post (sem_t *__sem) __THROW;
- /* Get current value of SEM and store it in *SVAL. */
- extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval)
- __THROW;
- __END_DECLS
- #endif /* semaphore.h */
|