gfx/ipc/CanvasRenderThread.h

   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 _include_gfx_ipc_CanvasRenderThread_h__
   8 #define _include_gfx_ipc_CanvasRenderThread_h__
   9
  10 #include "mozilla/DataMutex.h"
  11 #include "mozilla/layers/SynchronousTask.h"
  12 #include "mozilla/StaticPtr.h"
  13 #include "nsISupportsImpl.h"
  14 #include "nsThread.h"
  15
  16 namespace mozilla::gfx {
  17
  18 class CanvasRenderThread final {
  19   NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_MAIN_THREAD(
  20       CanvasRenderThread)
  21
  22  public:
  23   /// Can be called from any thread, may return nullptr late in shutdown.
  24   static CanvasRenderThread* Get();
  25
  26   /// Can only be called from the main thread, expected to be called at most
  27   /// once during a process' lifetime.
  28   static void Start();
  29
  30   /// Can only be called from the main thread.
  31   static void ShutDown();
  32
  33   /// Can be called from any thread.
  34   static bool IsInCanvasRenderThread();
  35
  36   /// Can be called from any thread, may return nullptr late in shutdown.
  37   static already_AddRefed<nsIThread> GetCanvasRenderThread();
  38
  39  private:
  40   explicit CanvasRenderThread(RefPtr<nsIThread> aThread);
  41   ~CanvasRenderThread();
  42
  43   void PostRunnable(already_AddRefed<nsIRunnable> aRunnable);
  44
  45   RefPtr<nsIThread> const mThread;
  46 };
  47
  48 }  // namespace mozilla::gfx
  49
  50 #endif  // _include_gfx_ipc_CanvasRenderThread_h__