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3e4a8e35fe
Summary: Because it's kinda more logical and we will rely on this in comming diffs. Reviewed By: mdvacca Differential Revision: D14587124 fbshipit-source-id: 94ae9410b4ffeffd0fcb4da4a0518f0bb0d2ba63
31 lines
1.0 KiB
C++
31 lines
1.0 KiB
C++
// Copyright 2004-present Facebook. All Rights Reserved.
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#pragma once
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namespace facebook {
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namespace react {
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inline static long 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 / (double)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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