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119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @brief Get Process Times
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* @ingroup libcsupport
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*/
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/*
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* COPYRIGHT (c) 1989-2013.
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* On-Line Applications Research Corporation (OAR).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/*
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* Needed to get the prototype for this libc helper method
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*/
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#define _LIBC
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#include <rtems.h>
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#include <sys/times.h>
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#include <sys/time.h>
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#include <string.h>
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#include <time.h>
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#include <rtems/seterr.h>
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#include <rtems/score/todimpl.h>
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#include <rtems/score/timestamp.h>
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#include <rtems/score/threadimpl.h>
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/**
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* POSIX 1003.1b 4.5.2 - Get Process Times
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*/
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clock_t _times(
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struct tms *ptms
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)
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{
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uint32_t tick_interval;
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sbintime_t uptime;
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sbintime_t cpu_time_used;
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if ( !ptms )
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rtems_set_errno_and_return_minus_one( EFAULT );
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tick_interval = (uint32_t)
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(SBT_1US * rtems_configuration_get_microseconds_per_tick());
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ptms = memset( ptms, 0, sizeof( *ptms ) );
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_TOD_Get_zero_based_uptime( &uptime );
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ptms->tms_stime = ((clock_t) uptime) / tick_interval;
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/*
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* RTEMS technically has no notion of system versus user time
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* since there is no separation of OS from application tasks.
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* But we can at least make a distinction between the number
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* of ticks since boot and the number of ticks executed by this
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* this thread.
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*/
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cpu_time_used =
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_Thread_Get_CPU_time_used_after_last_reset( _Thread_Get_executing() );
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ptms->tms_utime = ((clock_t) cpu_time_used) / tick_interval;
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return ptms->tms_stime;
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}
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/**
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* times() system call wrapper for _times() above.
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*/
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clock_t times(
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struct tms *ptms
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)
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{
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return _times( ptms );
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}
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#if defined(RTEMS_NEWLIB)
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#include <reent.h>
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/**
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* This is the Newlib dependent reentrant version of times().
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*/
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clock_t _times_r(
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struct _reent *ptr RTEMS_UNUSED,
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struct tms *ptms
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)
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{
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return _times( ptms );
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}
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#endif
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