59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * 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 COPYRIGHT HOLDERS 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
|
|
* COPYRIGHT OWNER 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 <sys/cdefs.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
typedef struct {
|
|
volatile unsigned int count;
|
|
} sem_t;
|
|
|
|
#define SEM_FAILED NULL
|
|
|
|
extern int sem_init(sem_t *sem, int pshared, unsigned int value);
|
|
|
|
extern int sem_close(sem_t *);
|
|
extern int sem_destroy(sem_t *);
|
|
extern int sem_getvalue(sem_t *, int *);
|
|
extern int sem_init(sem_t *, int, unsigned int);
|
|
extern sem_t *sem_open(const char *, int, ...);
|
|
extern int sem_post(sem_t *);
|
|
extern int sem_trywait(sem_t *);
|
|
extern int sem_unlink(const char *);
|
|
extern int sem_wait(sem_t *);
|
|
|
|
struct timespec;
|
|
extern int sem_timedwait(sem_t *sem, const struct timespec *abs_timeout);
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* _SEMAPHORE_H */
|