widget/windows/WinCompositorWindowThread.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 widget_windows_WinCompositorWindowThread_h
   8 #define widget_windows_WinCompositorWindowThread_h
   9
  10 #include "base/thread.h"
  11 #include "base/message_loop.h"
  12 #include "mozilla/Monitor.h"
  13
  14 namespace mozilla {
  15 namespace widget {
  16
  17 struct WinCompositorWnds {
  18   HWND mCompositorWnd;
  19   HWND mInitialParentWnd;
  20   WinCompositorWnds(HWND aCompositorWnd, HWND aInitialParentWnd)
  21       : mCompositorWnd(aCompositorWnd), mInitialParentWnd(aInitialParentWnd) {}
  22 };
  23
  24 class WinCompositorWindowThread final {
  25   NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_MAIN_THREAD(
  26       WinCompositorWindowThread)
  27
  28  public:
  29   /// Can be called from any thread.
  30   static WinCompositorWindowThread* Get();
  31
  32   /// Can only be called from the main thread.
  33   static void Start();
  34
  35   /// Can only be called from the main thread.
  36   static void ShutDown();
  37
  38   /// Can be called from any thread.
  39   static MessageLoop* Loop();
  40
  41   /// Can be called from any thread.
  42   static bool IsInCompositorWindowThread();
  43
  44   /// Can be called from any thread.
  45   static WinCompositorWnds CreateCompositorWindow();
  46
  47   /// Can be called from any thread.
  48   static void DestroyCompositorWindow(WinCompositorWnds aWnds);
  49
  50  private:
  51   explicit WinCompositorWindowThread(base::Thread* aThread);
  52   ~WinCompositorWindowThread() {}
  53
  54   void ShutDownTask();
  55
  56   UniquePtr<base::Thread> const mThread;
  57   Monitor mMonitor;
  58
  59   // Has ShutDown been called on us? We might have survived if our thread join
  60   // timed out.
  61   bool mHasAttemptedShutdown = false;
  62 };
  63
  64 }  // namespace widget
  65 }  // namespace mozilla
  66
  67 #endif  // widget_windows_WinCompositorWindowThread_h