pthread_cond_timedwait man page on Ultrix

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pthread_cond_timedwait(3thr)			  pthread_cond_timedwait(3thr)

Name
       pthread_cond_timedwait  - Causes a thread to wait for a condition vari‐
       able to be signaled or broadcast for a specified period of time.

Syntax
       #include <pthread.h>

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

Arguments
       cond    Condition variable waited on.

       mutex   Mutex associated with the condition variable specified in cond.

       abstime Absolute time at which the wait expires, if the	condition  has
	       not  been  signaled  or broadcast. (See the pthread_get_expira‐
	       tion_np routine, which is used to obtain a value for this argu‐
	       ment.)

Description
       This routine causes a thread to wait until one of the following occurs:

	  ·	 The specified condition variable is signaled or broadcast.

	  ·	 The current system clock time is greater than or equal to the
		 time specified by the abstime argument.

       This routine is identical to pthread_cond_wait except that this routine
       can  return  before  a  condition  variable  is	signaled or broadcast;
       specifically, when a specified time expires.

       If the current time equals or exceeds the expiration time, this routine
       returns immediately, without causing the current thread to wait. Other‐
       wise, waiting on the condition variable can become a nonblocking loop.

       Call this routine after you lock the mutex  specified  in  mutex.   The
       results	of  this  routine  are unpredictable if this routine is called
       without first locking the mutex.

Return Values
       If an error condition occurs, this routine returns -1 and errno is  set
       to  the	corresponding  error value. Possible return values are as fol‐
       lows.

       Return	Error	    Description
       0		    Successful	comple‐
			    tion.

       -1	[EINVAL]    The value specified
			    by cond, mutex,  or
			    abstime is invalid.

			    Different	mutexes
			    are	 supplied   for
			    concurrent
			    pthread_cond_timed‐
			    wait  operations or
			    pthread_cond_wait
			    operations	on  the
			    same      condition
			    variable.

       -1	[EAGAIN]    The	 time specified
			    by abstime expired.

       -1	[EDEADLK]   A  deadlock	 condi‐
			    tion is detected.

						  pthread_cond_timedwait(3thr)
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