SEMPOST(2) BSD System Calls Manual SEMPOST(2)

NAME
     sseemmppoosstt - unlock a semaphore

SYNOPSIS
     ##iinncclluuddee <>

     int
     sseemmppoosstt(semt *sem);

DESCRIPTION
     The semaphore referenced by sem is unlocked, the value of the semaphore
     is incremented, and all threads which are waiting on the semaphore are
     awakened.

     sseemmppoosstt() is reentrant with respect to signals and may be called from
     within a signal hanlder.

     If successful, sseemmppoosstt() will return 0.  Otherwise, -1 is returned and
     errno is set.

EERRRROORRSS
     sseemmppoosstt() succeeds unless:

     [EINVAL]           sem is not a valid semaphore descriptor.

SEE ALSO
     semopen(2), semtrywait(2), semwait(2), semctl(2), semget(2), semop(2)

HISTORY     sseemmppoosstt() is specified in the POSIX Realtime Extension
     (1003.1b-1993/1003.1i-1995).

Darwin                           June 8, 2000                           Darwin