blob: 7bc48560e679d9eed41dd5da15a6a95678cd4836 [file] [log] [blame]
/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
*
* 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#include "config.h"
#include <wtf/CPUTime.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <time.h>
#include <wtf/Optional.h>
namespace WTF {
static Seconds timevalToSeconds(const struct timeval& value)
{
return Seconds(value.tv_sec) + Seconds::fromMicroseconds(value.tv_usec);
}
Optional<CPUTime> CPUTime::get()
{
struct rusage resource { };
int ret = getrusage(RUSAGE_SELF, &resource);
ASSERT_UNUSED(ret, !ret);
return CPUTime { MonotonicTime::now(), timevalToSeconds(resource.ru_utime), timevalToSeconds(resource.ru_stime) };
}
Seconds CPUTime::forCurrentThread()
{
struct timespec ts { };
int ret = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
RELEASE_ASSERT(!ret);
return Seconds(ts.tv_sec) + Seconds::fromNanoseconds(ts.tv_nsec);
}
}