63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
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* Copyright (C) 2005 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 <utils/Timers.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <time.h>
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#include <android-base/macros.h>
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#include <utils/Log.h>
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static constexpr size_t clock_id_max = 5;
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static void checkClockId(int clock) {
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LOG_ALWAYS_FATAL_IF(clock < 0 || clock >= clock_id_max, "invalid clock id");
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}
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#if defined(__linux__)
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nsecs_t systemTime(int clock) {
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checkClockId(clock);
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static constexpr clockid_t clocks[] = {CLOCK_REALTIME, CLOCK_MONOTONIC,
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CLOCK_PROCESS_CPUTIME_ID, CLOCK_THREAD_CPUTIME_ID,
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CLOCK_BOOTTIME};
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static_assert(clock_id_max == arraysize(clocks));
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timespec t = {};
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clock_gettime(clocks[clock], &t);
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return nsecs_t(t.tv_sec)*1000000000LL + t.tv_nsec;
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}
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#else
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nsecs_t systemTime(int clock) {
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// TODO: is this ever called with anything but REALTIME on mac/windows?
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checkClockId(clock);
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// Clock support varies widely across hosts. Mac OS doesn't support
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// CLOCK_BOOTTIME (and doesn't even have clock_gettime until 10.12).
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// Windows is windows.
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timeval t = {};
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gettimeofday(&t, nullptr);
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return nsecs_t(t.tv_sec)*1000000000LL + nsecs_t(t.tv_usec)*1000LL;
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}
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#endif
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int toMillisecondTimeoutDelay(nsecs_t referenceTime, nsecs_t timeoutTime) {
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if (timeoutTime <= referenceTime) return 0;
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uint64_t timeoutDelay = uint64_t(timeoutTime - referenceTime);
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if (timeoutDelay > uint64_t((INT_MAX - 1) * 1000000LL)) return -1;
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return (timeoutDelay + 999999LL) / 1000000LL;
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}
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