Updated: 2021/Apr/14


SEM(4)                       Device Drivers Manual                      SEM(4)

NAME
     sem - POSIX semaphores

SYNOPSIS
     The POSIX semaphore code is included by default in all kernels.

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 and became
     non-optional in NetBSD 7.0.

NetBSD 9.99                     August 20, 2015                    NetBSD 9.99