/* -*- Mode: C++; tab-width: 2; 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 "ShutdownTracker.h" #include "mozilla/Services.h" #include "nsIObserver.h" #include "nsIObserverService.h" namespace mozilla { namespace image { class ShutdownTrackerImpl; /////////////////////////////////////////////////////////////////////////////// // Static Data /////////////////////////////////////////////////////////////////////////////// // Whether we've observed shutdown starting yet. static bool sShutdownHasStarted = false; /////////////////////////////////////////////////////////////////////////////// // Implementation /////////////////////////////////////////////////////////////////////////////// struct ShutdownObserver : public nsIObserver { NS_DECL_ISUPPORTS NS_IMETHOD Observe(nsISupports*, const char* aTopic, const char16_t*) override { if (strcmp(aTopic, "xpcom-will-shutdown") != 0) { return NS_OK; } nsCOMPtr<nsIObserverService> os = services::GetObserverService(); if (os) { os->RemoveObserver(this, "xpcom-will-shutdown"); } sShutdownHasStarted = true; return NS_OK; } private: virtual ~ShutdownObserver() { } }; NS_IMPL_ISUPPORTS(ShutdownObserver, nsIObserver) /////////////////////////////////////////////////////////////////////////////// // Public API /////////////////////////////////////////////////////////////////////////////// /* static */ void ShutdownTracker::Initialize() { nsCOMPtr<nsIObserverService> os = services::GetObserverService(); if (os) { os->AddObserver(new ShutdownObserver, "xpcom-will-shutdown", false); } } /* static */ bool ShutdownTracker::ShutdownHasStarted() { return sShutdownHasStarted; } } // namespace image } // namespace mozilla