зеркало из https://github.com/mozilla/gecko-dev.git
69 строки
2.3 KiB
C++
69 строки
2.3 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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#ifndef mozilla_AvailableMemoryWatcher_h
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#define mozilla_AvailableMemoryWatcher_h
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#include "mozilla/ipc/CrashReporterHost.h"
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#include "mozilla/UniquePtr.h"
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#include "MemoryPressureLevelMac.h"
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#include "nsCOMPtr.h"
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#include "nsIAvailableMemoryWatcherBase.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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namespace mozilla {
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// This class implements a platform-independent part to watch the system's
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// memory situation and invoke the registered callbacks when we detect
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// a low-memory situation or a high-memory situation.
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// The actual logic to monitor the memory status is implemented in a subclass
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// of nsAvailableMemoryWatcherBase per platform.
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class nsAvailableMemoryWatcherBase : public nsIAvailableMemoryWatcherBase,
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public nsIObserver {
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static StaticRefPtr<nsAvailableMemoryWatcherBase> sSingleton;
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static const char* const kObserverTopics[];
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TimeStamp mLowMemoryStart;
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protected:
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uint32_t mNumOfTabUnloading;
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uint32_t mNumOfMemoryPressure;
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nsCOMPtr<nsITabUnloader> mTabUnloader;
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nsCOMPtr<nsIObserverService> mObserverSvc;
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// Do not change this value off the main thread.
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bool mInteracting;
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virtual ~nsAvailableMemoryWatcherBase() = default;
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virtual nsresult Init();
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void Shutdown();
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void UpdateLowMemoryTimeStamp();
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void RecordTelemetryEventOnHighMemory();
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public:
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static already_AddRefed<nsAvailableMemoryWatcherBase> GetSingleton();
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nsAvailableMemoryWatcherBase();
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#if defined(XP_MACOSX)
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virtual void OnMemoryPressureChanged(MacMemoryPressureLevel aNewLevel){};
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virtual void AddChildAnnotations(
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const UniquePtr<ipc::CrashReporterHost>& aCrashReporter){};
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#endif
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIAVAILABLEMEMORYWATCHERBASE
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NS_DECL_NSIOBSERVER
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};
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// Method to create a platform-specific object
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already_AddRefed<nsAvailableMemoryWatcherBase> CreateAvailableMemoryWatcher();
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} // namespace mozilla
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#endif // ifndef mozilla_AvailableMemoryWatcher_h
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