/* * 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> 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); } }