sem(4) [netbsd man page]

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

NAME

     sem -- POSIX semaphores

SYNOPSIS

     To link into the kernel:

	   options P1003_1B_SEMAPHORE

DESCRIPTION

     The sem facility provides system calls used by the standard C library (libc) to implement POSIX semaphores.

SEE ALSO

     config(1), sem_destroy(3), sem_getvalue(3), sem_init(3), sem_open(3), sem_post(3), sem_wait(3), options(4)

HISTORY

     The sem facility appeared as a kernel option in NetBSD 2.0.

BUGS

     The current implementation does not support shared, unnamed semaphores.

BSD
								 January 21, 2005							       BSD

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