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Command: sem | Section: 4 | Source: FreeBSD | File: sem.4.gz
SEM(4) FreeBSD Kernel Interfaces Manual SEM(4)
NAME
sem - POSIX semaphores
SYNOPSIS
To compile this driver into the kernel, place the following line in your
kernel configuration file:
options P1003_1B_SEMAPHORES
Alternatively, to load the driver as a module at boot time, place the
following line in loader.conf(5):
sem_load="YES"
To load the driver as a module at run-time, run the following command as
root:
kldload sem
DESCRIPTION
The sem facility provides system calls used by the standard C library
(libc) to implement POSIX semaphores. This facility offers support for
such functions as sem_init() and sem_wait(). It is available both as a
kernel option for static inclusion and as a dynamic kernel module.
SEE ALSO
sem_destroy(3), sem_getvalue(3), sem_init(3), sem_open(3), sem_post(3),
sem_wait(3), config(8), kldload(8), kldunload(8)
HISTORY
The sem facility appeared in FreeBSD 5.0.
FreeBSD 14.1-RELEASE-p8 February 7, 2014 FreeBSD 14.1-RELEASE-p8