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Command: _ksem_open | Section: 2 | Source: NetBSD | File: _ksem_open.2
_KSEM(2) FreeBSD System Calls Manual _KSEM(2)
NAME
_ksem, _ksem_init, _ksem_open, _ksem_close, _ksem_unlink, _ksem_destroy,
_ksem_getvalue, _ksem_post, _ksem_wait, _ksem_timedwait, _ksem_trywait -
back-end implementation for POSIX semaphores
SYNOPSIS
#include <sys/ksem.h>
int
_ksem_init(int value, intptr_t *idp);
int
_ksem_open(const char *name, int oflag, mode_t mode, unsigned int value,
intptr_t *idp);
int
_ksem_close(intptr_t id);
int
_ksem_unlink(const char *name);
int
_ksem_destroy(intptr_t id);
int
_ksem_getvalue(intptr_t id, unsigned int *value);
int
_ksem_post(intptr_t id);
int
_ksem_wait(intptr_t id);
int
_ksem_timedwait(intptr_t id, const struct timespec *abstime);
int
_ksem_trywait(intptr_t id);
DESCRIPTION
The _ksem_*() family of system calls provide the kernel implementation of
POSIX semaphores.
RETURN VALUES
Successful calls to the _ksem_*() system calls return a value of zero.
Otherwise, -1 is returned and errno is set to provide more information.
ERRORS
Please see the section 3 manual pages for specific error information.
SEE ALSO
sem_close(3), sem_destroy(3), sem_getvalue(3), sem_init(3), sem_open(3),
sem_post(3), sem_unlink(3), sem_wait(3), sem(4)
HISTORY
Most of the _ksem_*() system calls first appeared in NetBSD 2.0. The
_ksem_timedwait() system call first appeared in NetBSD 5.0.
FreeBSD 14.1-RELEASE-p8 November 30, 2015 FreeBSD 14.1-RELEASE-p8