pthread_cond_signal(3-thr) — Reliant UNIX 5.44c4

pthread_cond_signal(3-thr)                       pthread_cond_signal(3-thr)

NAME
     pthreadcondsignal - wakes one thread that is waiting on a condition
     variable

SYNOPSIS
     #include <pthread.h>

     int pthreadcondsignal(pthreadcondt *cond);

PARAMETERS
     cond      Condition variable signaled.

DESCRIPTION
     The pthreadcondsignal() routine wakes one thread waiting on a condi-
     tion variable. Calling this routine implies that data guarded by the
     associated mutex has changed so that it is possible for a single wait-
     ing thread to proceed. Call this routine when any thread waiting on
     the specified condition variable might find its predicate true, but
     only one thread needs to proceed.

     The scheduling policy determines which thread is awakened. For poli-
     cies SCHEDFIFO and SCHEDRR a blocked thread is chosen in priority
     order.

     Call this routine when the associated mutex is either locked or
     unlocked.

RETURN VALUES
     If the function fails, errno may be set to one of the following
     values:

     EINVAL    The value specified by cond is invalid.

SEE ALSO
     pthreadcondbroadcast(3-thr), pthreadconddestroy(3-thr),
     pthreadcondinit(3-thr), pthreadcondtimedwait(3-thr),
     pthreadcondwait(3-thr).


















Page 1                       Reliant UNIX 5.44                Printed 11/98
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