57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
/*
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* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
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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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE 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
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <wtf/CPUTime.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <time.h>
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namespace WTF {
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static Seconds timevalToSeconds(const struct timeval& value)
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{
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return Seconds(value.tv_sec) + Seconds::fromMicroseconds(value.tv_usec);
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}
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std::optional<CPUTime> CPUTime::get()
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{
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struct rusage resource { };
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int ret = getrusage(RUSAGE_SELF, &resource);
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ASSERT_UNUSED(ret, !ret);
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return CPUTime { MonotonicTime::now(), timevalToSeconds(resource.ru_utime), timevalToSeconds(resource.ru_stime) };
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}
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Seconds CPUTime::forCurrentThread()
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{
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struct timespec ts { };
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int ret = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
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RELEASE_ASSERT(!ret);
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return Seconds(ts.tv_sec) + Seconds::fromNanoseconds(ts.tv_nsec);
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}
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}
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