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/**
* @file score/src/timespectoticks.c
*/
/*
* 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 <sys/types.h>
#include <rtems/system.h>
#include <rtems/config.h>
#include <rtems/score/timespec.h>
#include <rtems/score/tod.h>
#include <rtems/score/watchdog.h>
/**
*
* This routines converts a timespec to the corresponding number of ticks.
*/
uint32_t _Timespec_To_ticks(
const struct timespec *time
)
{
uint32_t ticks;
uint32_t nanoseconds_per_tick;
if ( (time->tv_sec == 0) && (time->tv_nsec == 0) )
return 0;
/**
* We should ensure the ticks not be truncated by integer division. We
* need to have it be greater than or equal to the requested time. It
* should not be shorter.
*/
ticks = time->tv_sec * TOD_TICKS_PER_SECOND;
nanoseconds_per_tick = rtems_configuration_get_nanoseconds_per_tick();
ticks += time->tv_nsec / nanoseconds_per_tick;
if ( (time->tv_nsec % nanoseconds_per_tick) != 0 )
ticks += 1;
return ticks;
}
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