tor-browser

The Tor Browser
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WorkletThread.h (2192B)

      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 #ifndef mozilla_dom_worklet_WorkletThread_h
      8 #define mozilla_dom_worklet_WorkletThread_h
      9 
     10 #include "mozilla/CondVar.h"
     11 #include "mozilla/RefPtr.h"
     12 #include "mozilla/dom/WorkletImpl.h"
     13 #include "nsIObserver.h"
     14 #include "nsThread.h"
     15 
     16 class nsIRunnable;
     17 
     18 namespace JS {
     19 class ContextOptions;
     20 };  // namespace JS
     21 
     22 namespace mozilla::dom {
     23 
     24 class WorkletThread final : public nsThread, public nsIObserver {
     25 public:
     26  NS_DECL_ISUPPORTS_INHERITED
     27  NS_DECL_NSIOBSERVER
     28 
     29  static already_AddRefed<WorkletThread> Create(WorkletImpl* aWorkletImpl);
     30 
     31  // Threads that call EnsureCycleCollectedJSContext must call
     32  // DeleteCycleCollectedJSContext::Get() before terminating.  Clients of
     33  // Create() do not need to do this as Terminate() will ensure this happens.
     34  static void EnsureCycleCollectedJSContext(JSRuntime* aParentRuntime,
     35                                            const JS::ContextOptions& aOptions);
     36  static void DeleteCycleCollectedJSContext();
     37 
     38  static bool IsOnWorkletThread();
     39 
     40  static void AssertIsOnWorkletThread();
     41 
     42  nsresult DispatchRunnable(already_AddRefed<nsIRunnable> aRunnable);
     43 
     44  void Terminate();
     45 
     46  // Recommended native stack size to use, greater than the stack size
     47  // internally used by SpiderMonkey.
     48  static uint32_t StackSize();
     49 
     50 private:
     51  explicit WorkletThread(WorkletImpl* aWorkletImpl);
     52  ~WorkletThread();
     53 
     54  void RunEventLoop();
     55  class PrimaryRunnable;
     56 
     57  void TerminateInternal();
     58  class TerminateRunnable;
     59 
     60  // This should only be called by consumers that have an
     61  // nsIEventTarget/nsIThread pointer.
     62  using nsThread::DelayedDispatch;
     63  using nsThread::Dispatch;
     64  using nsThread::DispatchFromScript;
     65 
     66  const RefPtr<WorkletImpl> mWorkletImpl;
     67 
     68  bool mExitLoop;  // worklet execution thread
     69 
     70  bool mIsTerminating;  // main thread
     71 };
     72 
     73 }  // namespace mozilla::dom
     74 
     75 #endif  // mozilla_dom_worklet_WorkletThread_h