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pthread_cond_wait(3)

NAME

     pthread_cond_wait -- wait on a condition variable

LIBRARY

     Reentrant C Library (libc_r, -lc_r)
     POSIX Threads Library (libpthread, -lpthread)
     1:1 Threading Library (libthr, -lthr)

SYNOPSIS

     #include <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 unblocks 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.	Other-
     wise 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.

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 ISO/IEC 9945-1:1996
     (``POSIX.1'').

FreeBSD 5.4			 July 28, 1998			   FreeBSD 5.4

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