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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 8.0                      August 20, 2015                     NetBSD 8.0