53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/* Copyright (c) 2016 Phoenix Systems
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
SUCH DAMAGE.*/
|
|
|
|
#ifndef SEMAPHORE_H
|
|
#define SEMAPHORE_H
|
|
|
|
#include <time.h>
|
|
|
|
/* System specific semaphore definition. */
|
|
typedef struct {
|
|
int fd;
|
|
} sem_t;
|
|
|
|
/* Value returned if `sem_open' failed. */
|
|
#define SEM_FAILED ((sem_t *) 0)
|
|
|
|
/* Maximum value the semaphore can have. */
|
|
#define SEM_VALUE_MAX (2147483647)
|
|
|
|
int sem_init(sem_t *sem, int pshared, unsigned int value);
|
|
int sem_destroy(sem_t *sem);
|
|
sem_t *sem_open(const char *name, int oflag, ...);
|
|
int sem_close(sem_t *sem);
|
|
int sem_unlink(const char *name);
|
|
int sem_wait(sem_t *sem);
|
|
int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout);
|
|
int sem_trywait(sem_t *sem);
|
|
int sem_post(sem_t *sem);
|
|
int sem_getvalue(sem_t * sem, int *sval);
|
|
|
|
#endif
|