57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
/*
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* Copyright (C) 2018 Google, Inc. All rights reserved.
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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 <zircon/syscalls.h>
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namespace WTF {
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static Seconds timeToSeconds(zx_time_t t)
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{
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return Seconds(t / static_cast<double>(ZX_SEC(1)));
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}
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std::optional<CPUTime> CPUTime::get()
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{
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// Fuchsia issue ZX-2318 tracks being able to get the monotonic and thread
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// times atomically and being able to separate ZX_CLOCK_THREAD into user and
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// kernel time.
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zx_time_t thread = 0;
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zx_clock_get(ZX_CLOCK_THREAD, &thread);
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return CPUTime { MonotonicTime::now(), timeToSeconds(thread), Seconds() };
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}
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Seconds CPUTime::forCurrentThread()
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{
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zx_time_t thread = 0;
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zx_clock_get(ZX_CLOCK_THREAD, &thread)
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return timeToSeconds(thread);
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}
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}
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