forked from Imagelibrary/rtems
109 lines
1.5 KiB
C
109 lines
1.5 KiB
C
/* semaphore.h
|
|
*
|
|
* $Id$
|
|
*/
|
|
|
|
#ifndef __POSIX_SEMAPHORE_h
|
|
#define __POSIX_SEMAPHORE_h
|
|
|
|
#include <rtems/posix/features.h>
|
|
|
|
#if defined(_POSIX_SEMAPHORES)
|
|
|
|
#include <sys/time.h>
|
|
|
|
/*
|
|
* 11.1 Semaphore Characteristics, P1003.1b-1993, p.219
|
|
*/
|
|
|
|
typedef int sem_t;
|
|
|
|
/*
|
|
* 11.2.1 Initialize an Unnamed Semaphore, P1003.1b-1993, p.219
|
|
*/
|
|
|
|
int sem_init(
|
|
sem_t *sem,
|
|
int pshared,
|
|
unsigned int value
|
|
);
|
|
|
|
/*
|
|
* 11.2.2 Destroy an Unnamed Semaphore, P1003.1b-1993, p.220
|
|
*/
|
|
|
|
int sem_destroy(
|
|
sem_t *sem
|
|
);
|
|
|
|
/*
|
|
* 11.2.3 Initialize/Open a Named Semaphore, P1003.1b-1993, p.221
|
|
*
|
|
* NOTE: Follows open() calling conventions.
|
|
*/
|
|
|
|
sem_t *sem_open(
|
|
const char *name,
|
|
int oflag,
|
|
...
|
|
);
|
|
|
|
/*
|
|
* 11.2.4 Close a Named Semaphore, P1003.1b-1993, p.224
|
|
*/
|
|
|
|
int sem_close(
|
|
sem_t *sem
|
|
);
|
|
|
|
/*
|
|
* 11.2.5 Remove a Named Semaphore, P1003.1b-1993, p.225
|
|
*/
|
|
|
|
int sem_unlink(
|
|
const char *name
|
|
);
|
|
|
|
/*
|
|
* 11.2.6 Lock a Semaphore, P1003.1b-1993, p.226
|
|
*
|
|
* NOTE: P1003.4b/D8 adds sem_timedwait(), p. 27
|
|
*/
|
|
|
|
int sem_wait(
|
|
sem_t *sem
|
|
);
|
|
|
|
int sem_trywait(
|
|
sem_t *sem
|
|
);
|
|
|
|
#if defined(_POSIX_TIMEOUTS)
|
|
int sem_timedwait(
|
|
sem_t *sem,
|
|
const struct timespec *timeout
|
|
);
|
|
#endif
|
|
|
|
/*
|
|
* 11.2.7 Unlock a Semaphore, P1003.1b-1993, p.227
|
|
*/
|
|
|
|
int sem_post(
|
|
sem_t *sem
|
|
);
|
|
|
|
/*
|
|
* 11.2.8 Get the Value of a Semaphore, P1003.1b-1993, p.229
|
|
*/
|
|
|
|
int sem_getvalue(
|
|
sem_t *sem,
|
|
int *sval
|
|
);
|
|
|
|
#endif /* _POSIX_SEMAPHORES */
|
|
|
|
#endif
|
|
/* end of include file */
|