semaphore.h File Reference

POSIX semaphores API (<semaphore.h>) More...

#include <time.h>
#include <zephyr/kernel.h>
#include <zephyr/toolchain.h>

Include dependency graph for semaphore.h:

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Macros
#define	SEM_FAILED   ((sem_t *) 0)
	Returned by sem_open() on failure.
#define	_SEM_T_DECLARED
#define	__sem_t_defined

Typedefs
typedef struct k_sem	sem_t
	Semaphore object type.

Functions
int	sem_destroy (sem_t *semaphore)
	Destroy an unnamed semaphore.
int	sem_getvalue (sem_t *ZRESTRICT semaphore, int *ZRESTRICT value)
	Get the current value of a semaphore.
int	sem_init (sem_t *semaphore, int pshared, unsigned int value)
	Initialise an unnamed semaphore.
int	sem_post (sem_t *semaphore)
	Unlock a semaphore (increment its count).
int	sem_timedwait (sem_t *ZRESTRICT semaphore, struct timespec *ZRESTRICT abstime)
	Lock a semaphore with an absolute timeout.
int	sem_trywait (sem_t *semaphore)
	Try to lock a semaphore without blocking.
int	sem_wait (sem_t *semaphore)
	Lock a semaphore, blocking until it becomes available.
sem_t *	sem_open (const char *name, int oflags,...)
	Open or create a named semaphore.
int	sem_unlink (const char *name)
	Remove a named semaphore.
int	sem_close (sem_t *sem)
	Close a named semaphore.

Detailed Description

POSIX semaphores API (<semaphore.h>)

See also

POSIX.1-2017 <semaphore.h>

Definition in file semaphore.h.

Macro Definition Documentation

__sem_t_defined

#define __sem_t_defined

Definition at line 36 of file semaphore.h.

_SEM_T_DECLARED

#define _SEM_T_DECLARED

Definition at line 35 of file semaphore.h.