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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_
#define CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_
#include <list>
#include <map>
#include "base/basictypes.h"
#include "base/memory/singleton.h"
#include "content/common/content_export.h"
namespace content {
class CONTENT_EXPORT RendererFrameManagerClient {
public:
virtual ~RendererFrameManagerClient() {}
virtual void EvictCurrentFrame() = 0;
};
class CONTENT_EXPORT RendererFrameManager {
public:
static RendererFrameManager* GetInstance();
void AddFrame(RendererFrameManagerClient*, bool locked);
void RemoveFrame(RendererFrameManagerClient*);
void LockFrame(RendererFrameManagerClient*);
void UnlockFrame(RendererFrameManagerClient*);
size_t max_number_of_saved_frames() const {
return max_number_of_saved_frames_;
}
// For testing only
void set_max_handles(float max_handles) { max_handles_ = max_handles; }
private:
RendererFrameManager();
~RendererFrameManager();
void CullUnlockedFrames();
friend struct DefaultSingletonTraits<RendererFrameManager>;
std::map<RendererFrameManagerClient*, size_t> locked_frames_;
std::list<RendererFrameManagerClient*> unlocked_frames_;
size_t max_number_of_saved_frames_;
float max_handles_;
DISALLOW_COPY_AND_ASSIGN(RendererFrameManager);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_
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