pthread_cond_signal, pthread_cond_broadcast --
wake up threads waiting on a condition variable
cc [options] -Kthread file
int pthread_cond_signal(pthread_cond_t *cond);
int pthread_cond_broadcast(pthread_cond_t *cond);
pthread_cond_signal wakes up a single thread,
if one exists, waiting on the condition cond.
pthread_cond_broadcast wakes up all threads
waiting on the condition cond.
If more than one thread is waiting,
the choice of which to release from the blocked group
is scheduling policy-specific:
Bound threads have priority over multiplexed threads; then
within each category the choice of thread is scheduling-policy-specific.
pthread_cond_signal and pthread_cond_broadcast
have no effect
if there are no threads waiting on cond.
A pthread_cond_signal or pthread_cond_broadcast
will be more reliable if the associated mutex
used by waiters is held across the call.
The condition variable denoted by cond
must previously have been initialized (see
See the description of how to use condition variables
pthread_cond_signal aand pthread_cond_broadcast
return zero for success
and an error number for failure.
If the following condition is detected,
pthread_cond_signal or pthread_cond_broadcast
return the corresponding value:
invalid argument specified
The Single UNIX Specification, Version 2; The Open Group.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004