7c92e48450
Use this for bootstat and init. This replaces the custom uptime parser in bootstat. This is a reland of aosp/332854 with a fix for Darwin. Bug: 34352037 Test: chrono_utils_test Change-Id: Ib2567d8df0e460ab59753ac1c053dd7f9f1008a7
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "android-base/chrono_utils.h"
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#include <time.h>
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namespace android {
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namespace base {
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boot_clock::time_point boot_clock::now() {
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timespec ts;
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clockid_t clk_id;
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#ifdef __ANDROID__
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clk_id = CLOCK_BOOTTIME;
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#else
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// Darwin does not support CLOCK_BOOTTIME. CLOCK_MONOTONIC is a sufficient
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// fallback; the only loss of precision is the time duration when the system
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// is suspended.
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clk_id = CLOCK_MONOTONIC;
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#endif // __ANDROID__
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clock_gettime(clk_id, &ts);
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return boot_clock::time_point(std::chrono::seconds(ts.tv_sec) +
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std::chrono::nanoseconds(ts.tv_nsec));
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}
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} // namespace base
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} // namespace android
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