pthread_cond_broadcast(3) Library Functions Manual pthread_cond_broadcast(3)
NAME
pthread_cond_broadcast - Wakes all threads that are waiting on the specified condition variable.
LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so)
SYNOPSIS
#include <pthread.h>
int pthread_cond_broadcast(
pthread_cond_t *cond);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
IEEE Std 1003.1c-1995, POSIX System Application Program Interface
PARAMETERS
Condition variable upon which the threads (to be awakened) are waiting.
DESCRIPTION
This routine unblocks all threads waiting on the specified condition variable cond. Calling this routine implies that data guarded by the
associated mutex has changed, so that it might be possible for one or more waiting threads to proceed. The threads that are unblocked
shall contend for the mutex according to their respective scheduling policies (if applicable).
If only one of the threads waiting on a condition variable may be able to proceed, but any single thread can proceed, then use
pthread_cond_signal(3) instead.
Whether the associated mutex is locked or unlocked, you can still call this routine. However, if predictable scheduling behavior is
required, that mutex should then be locked by the thread calling the pthread_cond_broadcast(3) routine.
If no threads are waiting on the specified condition variable, this routine takes no action. The broadcast does not propagate to the next
condition variable wait.
RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows:
Successful completion. The value specified by cond is invalid.
ERRORS
None
RELATED INFORMATION
Functions: pthread_cond_destroy(3), pthread_cond_init(3), pthread_cond_signal(3), pthread_cond_timedwait(3), pthread_cond_wait(3)
Manuals: Guide to DECthreads and Programmer's Guide
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pthread_cond_broadcast(3)