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 CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ 6 #define CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ 7 8 #include <list> 9 #include <map> 10 11 #include "base/basictypes.h" 12 #include "base/memory/singleton.h" 13 #include "content/common/content_export.h" 14 15 namespace content { 16 17 class CONTENT_EXPORT RendererFrameManagerClient { 18 public: 19 virtual ~RendererFrameManagerClient() {} 20 virtual void EvictCurrentFrame() = 0; 21 }; 22 23 class CONTENT_EXPORT RendererFrameManager { 24 public: 25 static RendererFrameManager* GetInstance(); 26 27 void AddFrame(RendererFrameManagerClient*, bool locked); 28 void RemoveFrame(RendererFrameManagerClient*); 29 void LockFrame(RendererFrameManagerClient*); 30 void UnlockFrame(RendererFrameManagerClient*); 31 32 size_t max_number_of_saved_frames() const { 33 return max_number_of_saved_frames_; 34 } 35 36 // For testing only 37 void set_max_handles(float max_handles) { max_handles_ = max_handles; } 38 39 private: 40 RendererFrameManager(); 41 ~RendererFrameManager(); 42 void CullUnlockedFrames(); 43 44 friend struct DefaultSingletonTraits<RendererFrameManager>; 45 46 std::map<RendererFrameManagerClient*, size_t> locked_frames_; 47 std::list<RendererFrameManagerClient*> unlocked_frames_; 48 size_t max_number_of_saved_frames_; 49 float max_handles_; 50 51 DISALLOW_COPY_AND_ASSIGN(RendererFrameManager); 52 }; 53 54 } // namespace content 55 56 #endif // CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ 57
