The Tor Browser: xpcom/threads/nsThreadManager.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim:set ts=2 sw=2 sts=2 et cindent: */

     3 /* This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     7 #ifndef nsThreadManager_h__

     8 #define nsThreadManager_h__

    10 #include "mozilla/Mutex.h"

    11 #include "nsIThreadManager.h"

    12 #include "nsRefPtrHashtable.h"

    13 #include "nsThread.h"

    15 class nsIRunnable;

    17 class nsThreadManager : public nsIThreadManager

    18 {

    19 public:

    20   NS_DECL_ISUPPORTS

    21   NS_DECL_NSITHREADMANAGER

    23   static nsThreadManager *get() {

    24     static nsThreadManager sInstance;

    25     return &sInstance;

    26   }

    28   nsresult Init();

    30   // Shutdown all threads.  This function should only be called on the main

    31   // thread of the application process.

    32   void Shutdown();

    34   // Called by nsThread to inform the ThreadManager it exists.  This method

    35   // must be called when the given thread is the current thread.

    36   void RegisterCurrentThread(nsThread *thread);

    38   // Called by nsThread to inform the ThreadManager it is going away.  This

    39   // method must be called when the given thread is the current thread.

    40   void UnregisterCurrentThread(nsThread *thread);

    42   // Returns the current thread.  Returns null if OOM or if ThreadManager isn't

    43   // initialized.

    44   nsThread *GetCurrentThread();

    46   // Returns the maximal number of threads that have been in existence

    47   // simultaneously during the execution of the thread manager.

    48   uint32_t GetHighestNumberOfThreads();

    50   // This needs to be public in order to support static instantiation of this

    51   // class with older compilers (e.g., egcs-2.91.66).

    52   ~nsThreadManager() {}

    54 private:

    55   nsThreadManager()

    56     : mCurThreadIndex(0)

    57     , mMainPRThread(nullptr)

    58     , mLock(nullptr)

    59     , mInitialized(false)

    60     , mCurrentNumberOfThreads(1)

    61     , mHighestNumberOfThreads(1) {

    62   }

    64   nsRefPtrHashtable<nsPtrHashKey<PRThread>, nsThread> mThreadsByPRThread;

    65   unsigned             mCurThreadIndex;  // thread-local-storage index

    66   nsRefPtr<nsThread>  mMainThread;

    67   PRThread           *mMainPRThread;

    68   // This is a pointer in order to allow creating nsThreadManager from

    69   // the static context in debug builds.

    70   nsAutoPtr<mozilla::Mutex> mLock;  // protects tables

    71   bool                mInitialized;

    73    // The current number of threads

    74    uint32_t           mCurrentNumberOfThreads;

    75    // The highest number of threads encountered so far during the session

    76    uint32_t           mHighestNumberOfThreads;

    77 };

    79 #define NS_THREADMANAGER_CID                       \

    80 { /* 7a4204c6-e45a-4c37-8ebb-6709a22c917c */       \

    81   0x7a4204c6,                                      \

    82   0xe45a,                                          \

    83   0x4c37,                                          \

    84   {0x8e, 0xbb, 0x67, 0x09, 0xa2, 0x2c, 0x91, 0x7c} \

    85 }

    87 #endif  // nsThreadManager_h__

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