tor-browser

The Tor Browser
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InternalThreadPool.h (2218B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
      2 * vim: set ts=8 sts=2 et sw=2 tw=80:
      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/. */
      6 
      7 /*
      8 * An internal thread pool, used for the shell and when
      9 * JS::SetHelperThreadTaskCallback not called.
     10 */
     11 
     12 #ifndef vm_InternalThreadPool_h
     13 #define vm_InternalThreadPool_h
     14 
     15 #include "js/AllocPolicy.h"
     16 #include "js/UniquePtr.h"
     17 #include "js/Vector.h"
     18 #include "threading/ConditionVariable.h"
     19 #include "threading/ProtectedData.h"
     20 
     21 namespace JS {
     22 class HelperThreadTask;
     23 };
     24 
     25 namespace js {
     26 
     27 class AutoLockHelperThreadState;
     28 class HelperThread;
     29 using JS::HelperThreadTask;
     30 
     31 using HelperThreadVector =
     32    Vector<UniquePtr<HelperThread>, 0, SystemAllocPolicy>;
     33 
     34 using HelperTaskVector = Vector<HelperThreadTask*, 0, SystemAllocPolicy>;
     35 
     36 class InternalThreadPool {
     37 public:
     38  static bool Initialize(size_t threadCount, AutoLockHelperThreadState& lock);
     39  static void ShutDown(AutoLockHelperThreadState& lock);
     40 
     41  static bool IsInitialized() { return Instance; }
     42  static InternalThreadPool& Get();
     43 
     44  bool ensureThreadCount(size_t threadCount, AutoLockHelperThreadState& lock);
     45  size_t threadCount(const AutoLockHelperThreadState& lock);
     46 
     47  size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf,
     48                             const AutoLockHelperThreadState& lock) const;
     49 
     50 private:
     51  static void DispatchTask(HelperThreadTask* task);
     52 
     53  void dispatchOrQueueTask(HelperThreadTask* task);
     54  void maybeDispatchQueuedTask();
     55  void shutDown(AutoLockHelperThreadState& lock);
     56 
     57  HelperThreadVector& threads(const AutoLockHelperThreadState& lock);
     58  const HelperThreadVector& threads(
     59      const AutoLockHelperThreadState& lock) const;
     60 
     61  void setThreadFree(uint32_t threadId);
     62  void clearThreadFree(uint32_t threadId);
     63 
     64  friend class HelperThread;
     65 
     66  static InternalThreadPool* Instance;
     67 
     68  HelperThreadLockData<HelperThreadVector> threads_;
     69  HelperThreadLockData<bool> terminating;
     70  HelperThreadLockData<uint32_t> freeThreadSet;
     71 };
     72 
     73 }  // namespace js
     74 
     75 #endif /* vm_InternalThreadPool_h */