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/**
* @file
*
* @brief Get Process Times
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-2013.
* 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.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
* Needed to get the prototype for this newlib helper method
*/
#define _COMPILING_NEWLIB
#include <rtems.h>
#include <sys/times.h>
#include <sys/time.h>
#include <string.h>
#include <time.h>
#include <rtems/seterr.h>
#include <rtems/score/todimpl.h>
#include <rtems/score/timestamp.h>
#include <rtems/score/threadimpl.h>
/**
* POSIX 1003.1b 4.5.2 - Get Process Times
*/
clock_t _times(
struct tms *ptms
)
{
uint32_t tick_interval;
sbintime_t uptime;
sbintime_t cpu_time_used;
if ( !ptms )
rtems_set_errno_and_return_minus_one( EFAULT );
tick_interval = (uint32_t)
(SBT_1US * rtems_configuration_get_microseconds_per_tick());
ptms = memset( ptms, 0, sizeof( *ptms ) );
_TOD_Get_zero_based_uptime( &uptime );
ptms->tms_stime = ((clock_t) uptime) / tick_interval;
/*
* RTEMS technically has no notion of system versus user time
* since there is no separation of OS from application tasks.
* But we can at least make a distinction between the number
* of ticks since boot and the number of ticks executed by this
* this thread.
*/
cpu_time_used =
_Thread_Get_CPU_time_used_after_last_reset( _Thread_Get_executing() );
ptms->tms_utime = ((clock_t) cpu_time_used) / tick_interval;
return ptms->tms_stime;
}
/**
* times() system call wrapper for _times() above.
*/
clock_t times(
struct tms *ptms
)
{
return _times( ptms );
}
#if defined(RTEMS_NEWLIB)
#include <reent.h>
/**
* This is the Newlib dependent reentrant version of times().
*/
clock_t _times_r(
struct _reent *ptr RTEMS_UNUSED,
struct tms *ptms
)
{
return _times( ptms );
}
#endif
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