tor-browser

The Tor Browser
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Uptime.cpp (1456B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "Uptime.h"
      8 
      9 #include "mozilla/Now.h"
     10 
     11 using namespace mozilla;
     12 
     13 namespace {
     14 
     15 static Maybe<uint64_t> mStartExcludingSuspendMs;
     16 static Maybe<uint64_t> mStartIncludingSuspendMs;
     17 
     18 };  // anonymous namespace
     19 
     20 namespace mozilla {
     21 
     22 void InitializeUptime() {
     23  MOZ_RELEASE_ASSERT(mStartIncludingSuspendMs.isNothing() &&
     24                         mStartExcludingSuspendMs.isNothing(),
     25                     "Must not be called more than once");
     26  mStartIncludingSuspendMs = NowIncludingSuspendMs();
     27  mStartExcludingSuspendMs = NowExcludingSuspendMs();
     28 }
     29 
     30 Maybe<uint64_t> ProcessUptimeMs() {
     31  if (!mStartIncludingSuspendMs) {
     32    return Nothing();
     33  }
     34  Maybe<uint64_t> maybeNow = NowIncludingSuspendMs();
     35  if (!maybeNow) {
     36    return Nothing();
     37  }
     38  return Some(maybeNow.value() - mStartIncludingSuspendMs.value());
     39 }
     40 
     41 Maybe<uint64_t> ProcessUptimeExcludingSuspendMs() {
     42  if (!mStartExcludingSuspendMs) {
     43    return Nothing();
     44  }
     45  Maybe<uint64_t> maybeNow = NowExcludingSuspendMs();
     46  if (!maybeNow) {
     47    return Nothing();
     48  }
     49  return Some(maybeNow.value() - mStartExcludingSuspendMs.value());
     50 }
     51 
     52 };  // namespace mozilla