sem4
Posix semaphores
Usage
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
Overview
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.
Releases
55 releases since FreeBSD 5.1-RELEASE; the text changed 33 times.