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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "PerformanceService.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPtr.h"
namespace mozilla {
namespace dom {
static StaticRefPtr<PerformanceService> gPerformanceService;
static StaticMutex gPerformanceServiceMutex;
/* static */ PerformanceService*
PerformanceService::GetOrCreate()
{
StaticMutexAutoLock al(gPerformanceServiceMutex);
if (!gPerformanceService) {
gPerformanceService = new PerformanceService();
ClearOnShutdown(&gPerformanceService);
}
return gPerformanceService;
}
DOMHighResTimeStamp
PerformanceService::TimeOrigin(const TimeStamp& aCreationTimeStamp) const
{
return (aCreationTimeStamp - mCreationTimeStamp).ToMilliseconds() +
(mCreationEpochTime / PR_USEC_PER_MSEC);
}
PerformanceService::PerformanceService()
{
mCreationTimeStamp = TimeStamp::Now();
mCreationEpochTime = PR_Now();
}
} // dom namespace
} // mozilla namespace
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