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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 CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ | |
| 6 #define CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ | |
| 7 | |
| 8 #include <stddef.h> | |
| 9 | |
| 10 #include <list> | |
| 11 #include <map> | |
| 12 | |
| 13 #include "base/macros.h" | |
| 14 #include "base/memory/memory_coordinator_client.h" | |
| 15 #include "base/memory/memory_pressure_listener.h" | |
| 16 #include "base/memory/singleton.h" | |
| 17 #include "content/common/content_export.h" | |
| 18 | |
| 19 namespace content { | |
| 20 | |
| 21 class RenderWidgetHostViewAuraTest; | |
| 22 | |
| 23 class CONTENT_EXPORT RendererFrameManagerClient { | |
| 24 public: | |
| 25 virtual ~RendererFrameManagerClient() {} | |
| 26 virtual void EvictCurrentFrame() = 0; | |
| 27 }; | |
| 28 | |
| 29 // This class is responsible for globally managing which renderers keep their | |
| 30 // compositor frame when offscreen. We actively discard compositor frames for | |
| 31 // offscreen tabs, but keep a minimum amount, as an LRU cache, to make switching | |
| 32 // between a small set of tabs faster. The limit is a soft limit, because | |
| 33 // clients can lock their frame to prevent it from being discarded, e.g. if the | |
| 34 // tab is visible, or while capturing a screenshot. | |
| 35 class CONTENT_EXPORT RendererFrameManager : | |
| 36 public base::MemoryCoordinatorClient { | |
| 37 public: | |
| 38 static RendererFrameManager* GetInstance(); | |
| 39 | |
| 40 void AddFrame(RendererFrameManagerClient*, bool locked); | |
| 41 void RemoveFrame(RendererFrameManagerClient*); | |
| 42 void LockFrame(RendererFrameManagerClient*); | |
| 43 void UnlockFrame(RendererFrameManagerClient*); | |
| 44 | |
| 45 size_t GetMaxNumberOfSavedFrames() const; | |
| 46 | |
| 47 // For testing only | |
| 48 void set_max_number_of_saved_frames(size_t max_number_of_saved_frames) { | |
| 49 max_number_of_saved_frames_ = max_number_of_saved_frames; | |
| 50 } | |
| 51 void set_max_handles(float max_handles) { max_handles_ = max_handles; } | |
| 52 | |
| 53 private: | |
| 54 // Please remove when crbug.com/443824 has been fixed. | |
| 55 friend class RenderWidgetHostViewAuraTest; | |
| 56 | |
| 57 RendererFrameManager(); | |
| 58 ~RendererFrameManager() override; | |
| 59 | |
| 60 // base::MemoryCoordinatorClient implementation: | |
| 61 void OnPurgeMemory() override; | |
| 62 | |
| 63 void CullUnlockedFrames(size_t saved_frame_limit); | |
| 64 | |
| 65 // React on memory pressure events to adjust the number of cached frames. | |
| 66 void OnMemoryPressure( | |
| 67 base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level); | |
| 68 | |
| 69 void PurgeMemory(int percentage); | |
| 70 | |
| 71 friend struct base::DefaultSingletonTraits<RendererFrameManager>; | |
| 72 | |
| 73 // Listens for system under pressure notifications and adjusts number of | |
| 74 // cached frames accordingly. | |
| 75 std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_; | |
| 76 | |
| 77 std::map<RendererFrameManagerClient*, size_t> locked_frames_; | |
| 78 std::list<RendererFrameManagerClient*> unlocked_frames_; | |
| 79 size_t max_number_of_saved_frames_; | |
| 80 float max_handles_; | |
| 81 | |
| 82 DISALLOW_COPY_AND_ASSIGN(RendererFrameManager); | |
| 83 }; | |
| 84 | |
| 85 } // namespace content | |
| 86 | |
| 87 #endif // CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_ | |
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Chromium Code Reviews
Issue 2811083002:
Move frame eviction into components (Closed)
