osx man page for pthread_cond_timedwait

PTHREAD_COND_TIMEDWAIT(3)				   BSD Library Functions Manual 				 PTHREAD_COND_TIMEDWAIT(3)

NAME
     pthread_cond_timedwait -- wait on a condition variable for a specific amount of time

SYNOPSIS
     #include <pthread.h>

     int
     pthread_cond_timedwait(pthread_cond_t *restrict cond, pthread_mutex_t *restrict mutex, const struct timespec *restrict abstime);

DESCRIPTION
     The pthread_cond_timedwait() 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, or if the system time reaches the time specified in abstime, and the current
     thread reacquires the lock on mutex.

     Values for struct timespec can be obtained by adding the required time interval to the  the current time obtained using gettimeofday(2).

     Note that struct timeval and struct timespec use different units to specify the time. Hence, the user should always take care to perform the
     time unit conversions accordingly.

EXAMPLE
	struct timeval tv;
	struct timespec ts;
	gettimeofday(&tv, NULL);
	ts.tv_sec = tv.tv_sec + 0;
	ts.tv_nsec = 0;

RETURN VALUES
     If successful, the pthread_cond_timedwait() function will return zero.  Otherwise, an error number will be returned to indicate the error.

ERRORS
     pthread_cond_timedwait() will fail if:

     [EINVAL]		The value specified by cond, mutex or abstime is invalid.

     [ETIMEDOUT]	The system time has reached or exceeded the time specified in abstime.

SEE ALSO
     pthread_cond_broadcast(3), pthread_cond_destroy(3), pthread_cond_init(3), pthread_cond_signal(3), pthread_cond_wait(3), gettimeofday(2)

STANDARDS
     pthread_cond_timedwait() conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').

BSD
								   July 28, 1998							       BSD