| /* |
| * 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 <zircon/syscalls.h> |
| |
| namespace WTF { |
| |
| static Seconds timeToSeconds(zx_time_t t) |
| { |
| return Seconds(t / static_cast<double>(ZX_SEC(1))); |
| } |
| |
| std::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); |
| } |
| |
| } |