forked from mirrors/gecko-dev
46 lines
1.2 KiB
C++
46 lines
1.2 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 "PerformanceService.h"
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#include "mozilla/ClearOnShutdown.h"
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#include "mozilla/StaticMutex.h"
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#include "mozilla/StaticPtr.h"
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namespace mozilla {
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namespace dom {
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static StaticRefPtr<PerformanceService> gPerformanceService;
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static StaticMutex gPerformanceServiceMutex;
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/* static */ PerformanceService*
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PerformanceService::GetOrCreate()
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{
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StaticMutexAutoLock al(gPerformanceServiceMutex);
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if (!gPerformanceService) {
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gPerformanceService = new PerformanceService();
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ClearOnShutdown(&gPerformanceService);
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}
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return gPerformanceService;
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}
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DOMHighResTimeStamp
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PerformanceService::TimeOrigin(const TimeStamp& aCreationTimeStamp) const
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{
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return (aCreationTimeStamp - mCreationTimeStamp).ToMilliseconds() +
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(mCreationEpochTime / PR_USEC_PER_MSEC);
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}
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PerformanceService::PerformanceService()
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{
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mCreationTimeStamp = TimeStamp::Now();
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mCreationEpochTime = PR_Now();
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}
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} // dom namespace
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} // mozilla namespace
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