Line data    Source code

       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             : 
      13             : namespace mozilla {
      14             : namespace dom {
      15             : 
      16           3 : static StaticRefPtr<PerformanceService> gPerformanceService;
      17           3 : static StaticMutex gPerformanceServiceMutex;
      18             : 
      19             : /* static */ PerformanceService*
      20           0 : PerformanceService::GetOrCreate()
      21             : {
      22           0 :   StaticMutexAutoLock al(gPerformanceServiceMutex);
      23             : 
      24           0 :   if (!gPerformanceService) {
      25           0 :     gPerformanceService = new PerformanceService();
      26           0 :     ClearOnShutdown(&gPerformanceService);
      27             :   }
      28             : 
      29           0 :   return gPerformanceService;
      30             : }
      31             : 
      32             : DOMHighResTimeStamp
      33           0 : PerformanceService::TimeOrigin(const TimeStamp& aCreationTimeStamp) const
      34             : {
      35           0 :   return (aCreationTimeStamp - mCreationTimeStamp).ToMilliseconds() +
      36           0 :            (mCreationEpochTime / PR_USEC_PER_MSEC);
      37             : }
      38             : 
      39           0 : PerformanceService::PerformanceService()
      40             : {
      41           0 :   mCreationTimeStamp = TimeStamp::Now();
      42           0 :   mCreationEpochTime = PR_Now();
      43           0 : }
      44             : 
      45             : } // dom namespace
      46             : } // mozilla namespace