mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
4803cab8c4
Summary: This diff implements encapsulating all time metrics in a single class for better extensibility and readability. Reviewed By: JoshuaGross Differential Revision: D15179835 fbshipit-source-id: 62bdf94435a0d37a87ad9bad613cc8e38043a235
33 lines
1.0 KiB
C++
33 lines
1.0 KiB
C++
// Copyright 2004-present Facebook. All Rights Reserved.
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#pragma once
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#include <time.h>
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namespace facebook {
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namespace react {
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inline static int64_t getTime() {
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#ifdef ANDROID
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static const int64_t NANOSECONDS_IN_SECOND = 1000000000LL;
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static const int64_t NANOSECONDS_IN_MILLISECOND = 1000000LL;
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// Since SystemClock.uptimeMillis() is commonly used for performance
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// measurement in Java and uptimeMillis() internally uses
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// clock_gettime(CLOCK_MONOTONIC), we use the same API here. We need that to
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// make sure we use the same time system on both JS and Java sides. Links to
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// the source code:
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// https://android.googlesource.com/platform/frameworks/native/+/jb-mr1-release/libs/utils/SystemClock.cpp
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// https://android.googlesource.com/platform/system/core/+/master/libutils/Timers.cpp
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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int64_t nano = now.tv_sec * NANOSECONDS_IN_SECOND + now.tv_nsec;
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return nano / NANOSECONDS_IN_MILLISECOND;
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#else
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return 0l;
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#endif
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}
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} // namespace react
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} // namespace facebook
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