gecko-dev/dom/workers/Performance.cpp
2015-05-25 17:53:07 +01:00

81 lines
1.9 KiB
C++

/* -*- 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 "Performance.h"
#include "mozilla/dom/PerformanceBinding.h"
#include "WorkerPrivate.h"
BEGIN_WORKERS_NAMESPACE
Performance::Performance(WorkerPrivate* aWorkerPrivate)
: mWorkerPrivate(aWorkerPrivate)
{
mWorkerPrivate->AssertIsOnWorkerThread();
}
Performance::~Performance()
{
mWorkerPrivate->AssertIsOnWorkerThread();
}
JSObject*
Performance::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return PerformanceBinding_workers::Wrap(aCx, this, aGivenProto);
}
DOMHighResTimeStamp
Performance::Now() const
{
TimeDuration duration =
TimeStamp::Now() - mWorkerPrivate->NowBaseTimeStamp();
return duration.ToMilliseconds();
}
// To be removed once bug 1124165 lands
bool
Performance::IsPerformanceTimingAttribute(const nsAString& aName)
{
// In workers we just support navigationStart.
return aName.EqualsASCII("navigationStart");
}
DOMHighResTimeStamp
Performance::GetPerformanceTimingFromString(const nsAString& aProperty)
{
if (!IsPerformanceTimingAttribute(aProperty)) {
return 0;
}
if (aProperty.EqualsLiteral("navigationStart")) {
return mWorkerPrivate->NowBaseTimeHighRes();
}
MOZ_CRASH("IsPerformanceTimingAttribute and GetPerformanceTimingFromString are out of sync");
return 0;
}
DOMHighResTimeStamp
Performance::DeltaFromNavigationStart(DOMHighResTimeStamp aTime)
{
if (aTime == 0) {
return 0;
}
return aTime - mWorkerPrivate->NowBaseTimeHighRes();
}
void
Performance::DispatchBufferFullEvent()
{
// This method is needed just for InsertResourceEntry, but this method is not
// exposed to workers.
MOZ_CRASH("This should not be called.");
}
END_WORKERS_NAMESPACE