_KSEM(2) | System Calls Manual | _KSEM(2) |
_ksem
, _ksem_init
,
_ksem_open
, _ksem_close
,
_ksem_unlink
, _ksem_destroy
,
_ksem_getvalue
, _ksem_post
,
_ksem_wait
, _ksem_timedwait
,
_ksem_trywait
—
#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);
_ksem_*
() family of system calls provide the kernel
implementation of POSIX semaphores.
_ksem_*
() system calls return a
value of zero. Otherwise, -1 is returned and errno is
set to provide more information.
_ksem_*
() system calls first appeared in
NetBSD 2.0. The
_ksem_timedwait
() system call first appeared in
NetBSD 5.0.
November 30, 2015 | NetBSD 9.0 |