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/*
* Convert abstime timeout to ticks
*/
/*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <semaphore.h>
#include <limits.h>
#include <rtems/system.h>
#include <rtems/score/object.h>
#include <rtems/posix/semaphore.h>
#include <rtems/posix/time.h>
#include <rtems/seterr.h>
/*
* The abstime is a walltime. We turn it into an interval.
*/
int _POSIX_Absolute_timeout_to_ticks(
const struct timespec *abstime,
Watchdog_Interval *ticks_out
)
{
struct timespec current_time;
struct timespec difference;
if ( !_Timespec_Is_valid(abstime) )
return EINVAL;
_TOD_Get( ¤t_time );
/*
* Make sure the abstime is in the future
*/
if ( _Timespec_Less_than( abstime, ¤t_time ) )
return EINVAL;
_Timespec_Subtract( ¤t_time, abstime, &difference );
*ticks_out = _Timespec_To_ticks( &difference );
return 0;
}
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