android_webview/browser/gl_view_renderer_manager.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ANDROID_WEBVIEW_BROWSER_GL_VIEW_RENDERER_MANAGER_H_
   6 #define ANDROID_WEBVIEW_BROWSER_GL_VIEW_RENDERER_MANAGER_H_
   7
   8 #include <list>
   9
  10 #include "base/basictypes.h"
  11 #include "base/lazy_instance.h"
  12 #include "base/synchronization/lock.h"
  13 #include "base/threading/platform_thread.h"
  14
  15 namespace android_webview {
  16
  17 class SharedRendererState;
  18
  19 class GLViewRendererManager {
  20  public:
  21   typedef SharedRendererState* RendererType;
  22
  23  private:
  24   typedef std::list<RendererType> ListType;
  25
  26  public:
  27   typedef ListType::iterator Key;
  28
  29   static GLViewRendererManager* GetInstance();
  30
  31   Key NullKey();
  32
  33   Key PushBack(RendererType view);
  34
  35   // |key| must be already in manager. Move renderer corresponding to |key| to
  36   // most recent.
  37   void DidDrawGL(Key key);
  38
  39   void Remove(Key key);
  40
  41   RendererType GetMostRecentlyDrawn() const;
  42
  43  private:
  44   friend struct base::DefaultLazyInstanceTraits<GLViewRendererManager>;
  45
  46   GLViewRendererManager();
  47   ~GLViewRendererManager();
  48
  49   mutable base::Lock lock_;
  50   ListType mru_list_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(GLViewRendererManager);
  53 };
  54
  55 }  // namespace android_webview
  56
  57 #endif  // ANDROID_WEBVIEW_BROWSER_GL_VIEW_RENDERER_MANAGER_H_