зеркало из https://github.com/mozilla/gecko-dev.git
96 строки
3.5 KiB
C++
96 строки
3.5 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 nsThreadManager_h__
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#define nsThreadManager_h__
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#include "mozilla/Mutex.h"
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#include "nsIThreadManager.h"
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#include "nsThread.h"
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class nsIRunnable;
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class nsThreadManager : public nsIThreadManager {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSITHREADMANAGER
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static nsThreadManager& get();
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static void InitializeShutdownObserver();
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nsresult Init();
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// Shutdown all threads. This function should only be called on the main
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// thread of the application process.
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void Shutdown();
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// Called by nsThread to inform the ThreadManager it exists. This method
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// must be called when the given thread is the current thread.
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void RegisterCurrentThread(nsThread& aThread);
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// Called by nsThread to inform the ThreadManager it is going away. This
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// method must be called when the given thread is the current thread.
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void UnregisterCurrentThread(nsThread& aThread);
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// Returns the current thread. Returns null if OOM or if ThreadManager isn't
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// initialized. Creates the nsThread if one does not exist yet.
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nsThread* GetCurrentThread();
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// Returns true iff the currently running thread has an nsThread associated
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// with it (ie; whether this is a thread that we can dispatch runnables to).
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bool IsNSThread() const;
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// CreateCurrentThread sets up an nsThread for the current thread. It uses the
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// event queue and main thread flags passed in. It should only be called once
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// for the current thread. After it returns, GetCurrentThread() will return
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// the thread that was created. GetCurrentThread() will also create a thread
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// (lazily), but it doesn't allow the queue or main-thread attributes to be
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// specified.
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nsThread* CreateCurrentThread(mozilla::SynchronizedEventQueue* aQueue,
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nsThread::MainThreadFlag aMainThread);
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// Returns the maximal number of threads that have been in existence
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// simultaneously during the execution of the thread manager.
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uint32_t GetHighestNumberOfThreads();
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// This needs to be public in order to support static instantiation of this
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// class with older compilers (e.g., egcs-2.91.66).
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~nsThreadManager() {}
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void EnableMainThreadEventPrioritization();
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void FlushInputEventPrioritization();
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void SuspendInputEventPrioritization();
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void ResumeInputEventPrioritization();
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static bool MainThreadHasPendingHighPriorityEvents();
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private:
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nsThreadManager()
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: mCurThreadIndex(0), mMainPRThread(nullptr), mInitialized(false) {}
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nsresult SpinEventLoopUntilInternal(nsINestedEventLoopCondition* aCondition,
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bool aCheckingShutdown);
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static void ReleaseThread(void* aData);
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unsigned mCurThreadIndex; // thread-local-storage index
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RefPtr<nsThread> mMainThread;
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PRThread* mMainPRThread;
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mozilla::Atomic<bool, mozilla::SequentiallyConsistent,
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mozilla::recordreplay::Behavior::DontPreserve>
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mInitialized;
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};
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#define NS_THREADMANAGER_CID \
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{ /* 7a4204c6-e45a-4c37-8ebb-6709a22c917c */ \
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0x7a4204c6, 0xe45a, 0x4c37, { \
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0x8e, 0xbb, 0x67, 0x09, 0xa2, 0x2c, 0x91, 0x7c \
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} \
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}
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#endif // nsThreadManager_h__
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