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      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_
     58