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| 1 // Copyright (c) 2016 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_MONITOR_WIN_H_ | 5 #ifndef CONTENT_BROWSER_MEMORY_BROWSER_MEMORY_MONITOR_WIN_H_ |
| 6 #define COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_MONITOR_WIN_H_ | 6 #define CONTENT_BROWSER_MEMORY_BROWSER_MEMORY_MONITOR_WIN_H_ |
| 7 | 7 |
| 8 #include "components/memory_coordinator/browser/memory_monitor.h" | 8 #include "content/browser/memory/memory_monitor.h" |
| 9 #include "components/memory_coordinator/common/memory_coordinator_export.h" | |
| 10 | 9 |
| 11 namespace base { | 10 namespace base { |
| 12 struct SystemMemoryInfoKB; | 11 struct SystemMemoryInfoKB; |
| 13 } // namespace base | 12 } // namespace base |
| 14 | 13 |
| 15 namespace memory_coordinator { | 14 namespace content { |
| 16 | 15 |
| 17 class MemoryMonitorWinDelegate; | 16 class MemoryMonitorWinDelegate; |
| 18 | 17 |
| 19 // A memory monitor for the Windows platform. After much experimentation this | 18 // A memory monitor for the Windows platform. After much experimentation this |
| 20 // class uses a very simple heuristic to anticipate paging (critical memory | 19 // class uses a very simple heuristic to anticipate paging (critical memory |
| 21 // pressure). When the amount of memory available dips below a provided | 20 // pressure). When the amount of memory available dips below a provided |
| 22 // threshold, it is assumed that paging is inevitable. | 21 // threshold, it is assumed that paging is inevitable. |
| 23 class MEMORY_COORDINATOR_EXPORT MemoryMonitorWin : public MemoryMonitor { | 22 class CONTENT_EXPORT MemoryMonitorWin : public MemoryMonitor { |
| 24 public: | 23 public: |
| 25 // Default constants governing the amount of free memory that the memory | 24 // Default constants governing the amount of free memory that the memory |
| 26 // manager attempts to maintain. | 25 // manager attempts to maintain. |
| 27 static const int kLargeMemoryThresholdMB; | 26 static const int kLargeMemoryThresholdMB; |
| 28 static const int kSmallMemoryTargetFreeMB; | 27 static const int kSmallMemoryTargetFreeMB; |
| 29 static const int kLargeMemoryTargetFreeMB; | 28 static const int kLargeMemoryTargetFreeMB; |
| 30 | 29 |
| 31 MemoryMonitorWin(MemoryMonitorWinDelegate* delegate, int target_free_mb); | 30 MemoryMonitorWin(MemoryMonitorWinDelegate* delegate, int target_free_mb); |
| 32 ~MemoryMonitorWin() override {} | 31 ~MemoryMonitorWin() override {} |
| 33 | 32 |
| (...skipping 23 matching lines...) Expand all Loading... |
| 57 MemoryMonitorWinDelegate* delegate_; | 56 MemoryMonitorWinDelegate* delegate_; |
| 58 | 57 |
| 59 // The amount of memory that the memory manager (MM) attempts to keep in a | 58 // The amount of memory that the memory manager (MM) attempts to keep in a |
| 60 // free state. When less than this amount of physical memory is free, it is | 59 // free state. When less than this amount of physical memory is free, it is |
| 61 // assumed that the MM will start paging things out. | 60 // assumed that the MM will start paging things out. |
| 62 int target_free_mb_; | 61 int target_free_mb_; |
| 63 }; | 62 }; |
| 64 | 63 |
| 65 // A delegate that wraps functions used by MemoryMonitorWin. Used as a testing | 64 // A delegate that wraps functions used by MemoryMonitorWin. Used as a testing |
| 66 // seam. | 65 // seam. |
| 67 class MEMORY_COORDINATOR_EXPORT MemoryMonitorWinDelegate { | 66 class CONTENT_EXPORT MemoryMonitorWinDelegate { |
| 68 public: | 67 public: |
| 69 MemoryMonitorWinDelegate() {} | 68 MemoryMonitorWinDelegate() {} |
| 70 virtual ~MemoryMonitorWinDelegate() {} | 69 virtual ~MemoryMonitorWinDelegate() {} |
| 71 | 70 |
| 72 // Returns system memory information. | 71 // Returns system memory information. |
| 73 virtual void GetSystemMemoryInfo(base::SystemMemoryInfoKB* mem_info) = 0; | 72 virtual void GetSystemMemoryInfo(base::SystemMemoryInfoKB* mem_info) = 0; |
| 74 | 73 |
| 75 private: | 74 private: |
| 76 DISALLOW_COPY_AND_ASSIGN(MemoryMonitorWinDelegate); | 75 DISALLOW_COPY_AND_ASSIGN(MemoryMonitorWinDelegate); |
| 77 }; | 76 }; |
| 78 | 77 |
| 79 } // namespace memory_coordinator | 78 } // namespace content |
| 80 | 79 |
| 81 #endif // COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_MONITOR_WIN_H_ | 80 #endif // CONTENT_BROWSER_MEMORY_BROWSER_MEMORY_MONITOR_WIN_H_ |
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