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Man Pages


Manual Reference Pages  -  PTHREAD_COND_WAIT (3)

NAME

pthread_cond_wait - wait on a condition variable

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libpthread

SYNOPSIS


.In pthread.h int pthread_cond_wait pthread_cond_t *cond pthread_mutex_t *mutex

DESCRIPTION

The pthread_cond_wait function atomically blocks the current thread waiting on the condition variable specified by cond, and releases the mutex specified by mutex. The waiting thread unblocks only after another thread calls pthread_cond_signal(3), or pthread_cond_broadcast(3) with the same condition variable, and the current thread reacquires the lock on mutex.

RETURN VALUES

If successful, the pthread_cond_wait function will return zero. Otherwise an error number will be returned to indicate the error.

ERRORS

The pthread_cond_wait function will fail if:
[EINVAL]
  The value specified by cond or the value specified by mutex is invalid.
[EPERM]
  The specified mutex was not locked by the calling thread.

SEE ALSO

pthread_cond_broadcast(3), pthread_cond_destroy(3), pthread_cond_init(3), pthread_cond_signal(3), pthread_cond_timedwait(3)

STANDARDS

The pthread_cond_wait function conforms to -p1003.1-96.
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