blob: 7e773161248fce56460cf27ce95cecfc258327a1 [file] [log] [blame]
/*
* Copyright (C) 2018 Google, Inc. All rights reserved.
*
* 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 <wtf/Optional.h>
#include <zircon/syscalls.h>
namespace WTF {
static Seconds timeToSeconds(zx_time_t t)
{
return Seconds(t / static_cast<double>(ZX_SEC(1)));
}
Optional<CPUTime> CPUTime::get()
{
// Fuchsia issue ZX-2318 tracks being able to get the monotonic and thread
// times atomically and being able to separate ZX_CLOCK_THREAD into user and
// kernel time.
zx_time_t thread = 0;
zx_clock_get(ZX_CLOCK_THREAD, &thread);
return CPUTime { MonotonicTime::now(), timeToSeconds(thread), Seconds() };
}
Seconds CPUTime::forCurrentThread()
{
zx_time_t thread = 0;
zx_clock_get(ZX_CLOCK_THREAD, &thread)
return timeToSeconds(thread);
}
}