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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /xpcom/base/AvailableMemoryWatcher.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | xpcom/base/AvailableMemoryWatcher.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/xpcom/base/AvailableMemoryWatcher.h b/xpcom/base/AvailableMemoryWatcher.h new file mode 100644 index 0000000000..0468ad0fa3 --- /dev/null +++ b/xpcom/base/AvailableMemoryWatcher.h @@ -0,0 +1,68 @@ +/* -*- 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/. */ + +#ifndef mozilla_AvailableMemoryWatcher_h +#define mozilla_AvailableMemoryWatcher_h + +#include "mozilla/ipc/CrashReporterHost.h" +#include "mozilla/UniquePtr.h" +#include "MemoryPressureLevelMac.h" +#include "nsCOMPtr.h" +#include "nsIAvailableMemoryWatcherBase.h" +#include "nsIObserver.h" +#include "nsIObserverService.h" + +namespace mozilla { + +// This class implements a platform-independent part to watch the system's +// memory situation and invoke the registered callbacks when we detect +// a low-memory situation or a high-memory situation. +// The actual logic to monitor the memory status is implemented in a subclass +// of nsAvailableMemoryWatcherBase per platform. +class nsAvailableMemoryWatcherBase : public nsIAvailableMemoryWatcherBase, + public nsIObserver { + static StaticRefPtr<nsAvailableMemoryWatcherBase> sSingleton; + static const char* const kObserverTopics[]; + + TimeStamp mLowMemoryStart; + + protected: + uint32_t mNumOfTabUnloading; + uint32_t mNumOfMemoryPressure; + + nsCOMPtr<nsITabUnloader> mTabUnloader; + nsCOMPtr<nsIObserverService> mObserverSvc; + // Do not change this value off the main thread. + bool mInteracting; + + virtual ~nsAvailableMemoryWatcherBase() = default; + virtual nsresult Init(); + void Shutdown(); + void UpdateLowMemoryTimeStamp(); + void RecordTelemetryEventOnHighMemory(); + + public: + static already_AddRefed<nsAvailableMemoryWatcherBase> GetSingleton(); + + nsAvailableMemoryWatcherBase(); + +#if defined(XP_DARWIN) + virtual void OnMemoryPressureChanged(MacMemoryPressureLevel aNewLevel){}; + virtual void AddChildAnnotations( + const UniquePtr<ipc::CrashReporterHost>& aCrashReporter){}; +#endif + + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIAVAILABLEMEMORYWATCHERBASE + NS_DECL_NSIOBSERVER +}; + +// Method to create a platform-specific object +already_AddRefed<nsAvailableMemoryWatcherBase> CreateAvailableMemoryWatcher(); + +} // namespace mozilla + +#endif // ifndef mozilla_AvailableMemoryWatcher_h |