tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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PerformanceService.cpp (1289B)

      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 "PerformanceService.h"
      8 
      9 #include "mozilla/ClearOnShutdown.h"
     10 #include "mozilla/StaticMutex.h"
     11 #include "mozilla/StaticPtr.h"
     12 #include "prtime.h"
     13 
     14 namespace mozilla::dom {
     15 
     16 static StaticRefPtr<PerformanceService> gPerformanceService;
     17 static StaticMutex gPerformanceServiceMutex MOZ_UNANNOTATED;
     18 
     19 /* static */
     20 PerformanceService* PerformanceService::GetOrCreate() {
     21  StaticMutexAutoLock al(gPerformanceServiceMutex);
     22 
     23  if (!gPerformanceService) {
     24    gPerformanceService = new PerformanceService();
     25    ClearOnShutdown(&gPerformanceService);
     26  }
     27 
     28  return gPerformanceService;
     29 }
     30 
     31 DOMHighResTimeStamp PerformanceService::TimeOrigin(
     32    const TimeStamp& aCreationTimeStamp) const {
     33  return (aCreationTimeStamp - mCreationTimeStamp).ToMilliseconds() +
     34         (mCreationEpochTime / PR_USEC_PER_MSEC);
     35 }
     36 
     37 PerformanceService::PerformanceService() {
     38  mCreationTimeStamp = TimeStamp::Now();
     39  mCreationEpochTime = PR_Now();
     40 }
     41 
     42 }  // namespace mozilla::dom