sem man page on FreeBSD

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SEM(4)			 BSD Kernel Interfaces Manual			SEM(4)

NAME
     sem — POSIX semaphores

SYNOPSIS
     To compile this driver into the kernel, place the following lines 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"

	   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 as a kernel option in FreeBSD 3.0.  The sem
     kernel module appeared in FreeBSD 5.0.

BSD			       November 11, 2006			   BSD
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