| /* Copyright (C) 2002-2014 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) __THROWNL; |
| |
| /* Post SEM. */ |
| extern int sem_post (sem_t *__sem) __THROWNL; |
| |
| /* 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 */ |