diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
| commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
| tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /xpcom/threads/ThreadEventQueue.h | |
| parent | Initial commit. (diff) | |
| download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip | |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xpcom/threads/ThreadEventQueue.h')
| -rw-r--r-- | xpcom/threads/ThreadEventQueue.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/xpcom/threads/ThreadEventQueue.h b/xpcom/threads/ThreadEventQueue.h new file mode 100644 index 0000000000..5244acb3dc --- /dev/null +++ b/xpcom/threads/ThreadEventQueue.h @@ -0,0 +1,95 @@ +/* -*- 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_ThreadEventQueue_h +#define mozilla_ThreadEventQueue_h + +#include "mozilla/EventQueue.h" +#include "mozilla/CondVar.h" +#include "mozilla/SynchronizedEventQueue.h" +#include "nsCOMPtr.h" +#include "nsTArray.h" + +class nsIEventTarget; +class nsISerialEventTarget; +class nsIThreadObserver; + +namespace mozilla { + +class EventQueue; +class ThreadEventTarget; + +// A ThreadEventQueue implements normal monitor-style synchronization over the +// EventQueue. It also implements PushEventQueue and PopEventQueue for workers +// (see the documentation below for an explanation of those). All threads use a +// ThreadEventQueue as their event queue. Although for the main thread this +// simply forwards events to the TaskController. +class ThreadEventQueue final : public SynchronizedEventQueue { + public: + explicit ThreadEventQueue(UniquePtr<EventQueue> aQueue, + bool aIsMainThread = false); + + bool PutEvent(already_AddRefed<nsIRunnable>&& aEvent, + EventQueuePriority aPriority) final; + + already_AddRefed<nsIRunnable> GetEvent( + bool aMayWait, mozilla::TimeDuration* aLastEventDelay = nullptr) final; + bool HasPendingEvent() final; + + bool ShutdownIfNoPendingEvents() final; + + void Disconnect(const MutexAutoLock& aProofOfLock) final {} + + nsresult RegisterShutdownTask(nsITargetShutdownTask* aTask) final; + nsresult UnregisterShutdownTask(nsITargetShutdownTask* aTask) final; + void RunShutdownTasks() final; + + already_AddRefed<nsISerialEventTarget> PushEventQueue() final; + void PopEventQueue(nsIEventTarget* aTarget) final; + + already_AddRefed<nsIThreadObserver> GetObserver() final; + already_AddRefed<nsIThreadObserver> GetObserverOnThread() final; + void SetObserver(nsIThreadObserver* aObserver) final; + + Mutex& MutexRef() { return mLock; } + + size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) override; + + private: + class NestedSink; + + virtual ~ThreadEventQueue(); + + bool PutEventInternal(already_AddRefed<nsIRunnable>&& aEvent, + EventQueuePriority aPriority, NestedSink* aQueue); + + const UniquePtr<EventQueue> mBaseQueue MOZ_GUARDED_BY(mLock); + + struct NestedQueueItem { + UniquePtr<EventQueue> mQueue; + RefPtr<ThreadEventTarget> mEventTarget; + + NestedQueueItem(UniquePtr<EventQueue> aQueue, + ThreadEventTarget* aEventTarget); + }; + + nsTArray<NestedQueueItem> mNestedQueues MOZ_GUARDED_BY(mLock); + + Mutex mLock; + CondVar mEventsAvailable MOZ_GUARDED_BY(mLock); + + bool mEventsAreDoomed MOZ_GUARDED_BY(mLock) = false; + nsCOMPtr<nsIThreadObserver> mObserver MOZ_GUARDED_BY(mLock); + nsTArray<nsCOMPtr<nsITargetShutdownTask>> mShutdownTasks + MOZ_GUARDED_BY(mLock); + bool mShutdownTasksRun MOZ_GUARDED_BY(mLock) = false; + + const bool mIsMainThread; +}; + +} // namespace mozilla + +#endif // mozilla_ThreadEventQueue_h |