gecko-dev/dom/media/systemservices/LoadManagerFactory.cpp

50 строки
1.6 KiB
C++

/* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "LoadManager.h"
#include "LoadManagerFactory.h"
#include "MainThreadUtils.h"
#include "nsIObserverService.h"
#include "mozilla/Preferences.h"
namespace mozilla {
// Assume stored in an nsAutoPtr<>
LoadManager *
LoadManagerBuild(void)
{
return new LoadManager(LoadManagerSingleton::Get());
}
/* static */ LoadManagerSingleton*
LoadManagerSingleton::Get() {
if (!sSingleton) {
MOZ_ASSERT(NS_IsMainThread());
int loadMeasurementInterval =
mozilla::Preferences::GetInt("media.navigator.load_adapt.measure_interval", 1000);
int averagingSeconds =
mozilla::Preferences::GetInt("media.navigator.load_adapt.avg_seconds", 3);
float highLoadThreshold =
mozilla::Preferences::GetFloat("media.navigator.load_adapt.high_load", 0.90f);
float lowLoadThreshold =
mozilla::Preferences::GetFloat("media.navigator.load_adapt.low_load", 0.40f);
sSingleton = new LoadManagerSingleton(loadMeasurementInterval,
averagingSeconds,
highLoadThreshold,
lowLoadThreshold);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
if (obs) {
obs->AddObserver(sSingleton, "xpcom-shutdown", false);
}
}
return sSingleton;
}
}; // namespace