/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Get Process Times
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-2013.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
* Needed to get the prototype for this libc helper method
*/
#define _LIBC
#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
