mirror of
https://github.com/mozilla/gecko-dev.git
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152 lines
3.9 KiB
C++
152 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Uptime.h"
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#ifdef XP_WIN
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# include "mozilla/DynamicallyLinkedFunctionPtr.h"
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#endif // XP_WIN
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#include <stdint.h>
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#include "mozilla/TimeStamp.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/Assertions.h"
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using namespace mozilla;
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namespace {
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Maybe<uint64_t> NowIncludingSuspendMs();
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Maybe<uint64_t> NowExcludingSuspendMs();
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static Maybe<uint64_t> mStartExcludingSuspendMs;
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static Maybe<uint64_t> mStartIncludingSuspendMs;
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// Apple things
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#if defined(__APPLE__) && defined(__MACH__)
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# include <time.h>
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# include <sys/time.h>
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# include <sys/types.h>
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# include <mach/mach_time.h>
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const uint64_t kNSperMS = 1000000;
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Maybe<uint64_t> NowExcludingSuspendMs() {
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return Some(clock_gettime_nsec_np(CLOCK_UPTIME_RAW) / kNSperMS);
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}
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Maybe<uint64_t> NowIncludingSuspendMs() {
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return Some(clock_gettime_nsec_np(CLOCK_MONOTONIC_RAW) / kNSperMS);
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}
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#elif defined(XP_WIN)
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// Number of hundreds of nanoseconds in a millisecond
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static constexpr uint64_t kHNSperMS = 10000;
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Maybe<uint64_t> NowExcludingSuspendMs() {
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ULONGLONG interrupt_time;
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if (!QueryUnbiasedInterruptTime(&interrupt_time)) {
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return Nothing();
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}
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return Some(interrupt_time / kHNSperMS);
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}
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Maybe<uint64_t> NowIncludingSuspendMs() {
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static const mozilla::StaticDynamicallyLinkedFunctionPtr<void(WINAPI*)(
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PULONGLONG)>
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pQueryInterruptTime(L"KernelBase.dll", "QueryInterruptTime");
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if (!pQueryInterruptTime) {
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// On Windows, this does include the time the computer was suspended so it's
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// an adequate fallback.
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TimeStamp processCreation = TimeStamp::ProcessCreation();
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TimeStamp now = TimeStamp::Now();
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if (!processCreation.IsNull() && !now.IsNull()) {
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return Some(uint64_t((now - processCreation).ToMilliseconds()));
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} else {
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return Nothing();
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}
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}
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ULONGLONG interrupt_time;
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pQueryInterruptTime(&interrupt_time);
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return Some(interrupt_time / kHNSperMS);
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}
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#elif defined(XP_LINUX) // including Android
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# include <time.h>
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// Number of nanoseconds in a millisecond.
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static constexpr uint64_t kNSperMS = 1000000;
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uint64_t TimespecToMilliseconds(struct timespec aTs) {
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return aTs.tv_sec * 1000 + aTs.tv_nsec / kNSperMS;
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}
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Maybe<uint64_t> NowExcludingSuspendMs() {
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struct timespec ts = {0};
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if (clock_gettime(CLOCK_MONOTONIC, &ts)) {
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return Nothing();
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}
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return Some(TimespecToMilliseconds(ts));
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}
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Maybe<uint64_t> NowIncludingSuspendMs() {
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# ifndef CLOCK_BOOTTIME
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return Nothing();
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# else
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struct timespec ts = {0};
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if (clock_gettime(CLOCK_BOOTTIME, &ts)) {
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return Nothing();
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}
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return Some(TimespecToMilliseconds(ts));
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# endif
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}
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#else // catch all
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Maybe<uint64_t> NowExcludingSuspendMs() { return Nothing(); }
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Maybe<uint64_t> NowIncludingSuspendMs() { return Nothing(); }
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#endif
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}; // anonymous namespace
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namespace mozilla {
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void InitializeUptime() {
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MOZ_RELEASE_ASSERT(mStartIncludingSuspendMs.isNothing() &&
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mStartExcludingSuspendMs.isNothing(),
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"Must not be called more than once");
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mStartIncludingSuspendMs = NowIncludingSuspendMs();
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mStartExcludingSuspendMs = NowExcludingSuspendMs();
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}
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Maybe<uint64_t> ProcessUptimeMs() {
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if (!mStartIncludingSuspendMs) {
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return Nothing();
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}
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Maybe<uint64_t> maybeNow = NowIncludingSuspendMs();
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if (!maybeNow) {
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return Nothing();
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}
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return Some(maybeNow.value() - mStartIncludingSuspendMs.value());
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}
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Maybe<uint64_t> ProcessUptimeExcludingSuspendMs() {
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if (!mStartExcludingSuspendMs) {
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return Nothing();
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}
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Maybe<uint64_t> maybeNow = NowExcludingSuspendMs();
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if (!maybeNow) {
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return Nothing();
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}
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return Some(maybeNow.value() - mStartExcludingSuspendMs.value());
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}
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}; // namespace mozilla
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