sem(4)

Usage

To link into the kernel:

options P1003_1B_SEMAPHORES

To load as a kernel loadable module:

kldload sem

Overview

The sem facility provides system calls used by the standard C library (libc) to implement POSIX semaphores. It is available both as a kernel option for static inclusion and as a dynamic kernel module.

sem_destroy(3) destroy an unnamed semaphore sem_getvalue(3) get the value of a semaphore sem_init(3) initialize an unnamed semaphore sem_open(3) initialize and open a named semaphore sem_post(3) unlock a semaphore sem_wait(3) lock a semaphore config(8) build system configuration files kldload(8) load a file into the kernel kldunload(8) unload a file from the kernel

Usage

Overview

See also