89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsRefPtrHashtable.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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{
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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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{
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static nsThreadManager sInstance;
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return sInstance;
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}
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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.
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nsThread* GetCurrentThread();
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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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{
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}
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private:
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nsThreadManager()
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: mCurThreadIndex(0)
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, mMainPRThread(nullptr)
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, mLock("nsThreadManager.mLock")
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, mInitialized(false)
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, mCurrentNumberOfThreads(1)
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, mHighestNumberOfThreads(1)
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{
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}
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nsRefPtrHashtable<nsPtrHashKey<PRThread>, nsThread> mThreadsByPRThread;
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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::OffTheBooksMutex mLock; // protects tables
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mozilla::Atomic<bool> mInitialized;
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// The current number of threads
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uint32_t mCurrentNumberOfThreads;
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// The highest number of threads encountered so far during the session
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uint32_t mHighestNumberOfThreads;
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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, \
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0xe45a, \
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0x4c37, \
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{0x8e, 0xbb, 0x67, 0x09, 0xa2, 0x2c, 0x91, 0x7c} \
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}
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#endif // nsThreadManager_h__
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