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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_H_ | 5 #ifndef CONTENT_BROWSER_MEMORY_BROWSER_MEMORY_MONITOR_H_ |
| 6 #define COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_MONITOR_H_ | 6 #define CONTENT_BROWSER_MEMORY_BROWSER_MEMORY_MONITOR_H_ |
| 7 | 7 |
| 8 #include <memory> | 8 #include <memory> |
| 9 | 9 |
| 10 #include "base/macros.h" | 10 #include "base/macros.h" |
| 11 #include "components/memory_coordinator/common/memory_coordinator_export.h" | 11 #include "content/common/content_export.h" |
| 12 | 12 |
| 13 namespace memory_coordinator { | 13 namespace content { |
| 14 | 14 |
| 15 // A simple class that monitors the amount of free memory available on a system. | 15 // A simple class that monitors the amount of free memory available on a system. |
| 16 // This is an interface to facilitate dependency injection for testing. | 16 // This is an interface to facilitate dependency injection for testing. |
| 17 class MEMORY_COORDINATOR_EXPORT MemoryMonitor { | 17 class CONTENT_EXPORT MemoryMonitor { |
| 18 public: | 18 public: |
| 19 MemoryMonitor() {} | 19 MemoryMonitor() {} |
| 20 virtual ~MemoryMonitor() {} | 20 virtual ~MemoryMonitor() {} |
| 21 | 21 |
| 22 // Returns the amount of free memory available on the system until the system | 22 // Returns the amount of free memory available on the system until the system |
| 23 // will be in a critical state. Critical is as defined by the OS (swapping | 23 // will be in a critical state. Critical is as defined by the OS (swapping |
| 24 // will occur, or physical memory will run out, etc). It is possible for this | 24 // will occur, or physical memory will run out, etc). It is possible for this |
| 25 // to return negative values, in which case that much memory would have to be | 25 // to return negative values, in which case that much memory would have to be |
| 26 // freed in order to exit a critical memory state. | 26 // freed in order to exit a critical memory state. |
| 27 virtual int GetFreeMemoryUntilCriticalMB() = 0; | 27 virtual int GetFreeMemoryUntilCriticalMB() = 0; |
| 28 | 28 |
| 29 private: | 29 private: |
| 30 DISALLOW_COPY_AND_ASSIGN(MemoryMonitor); | 30 DISALLOW_COPY_AND_ASSIGN(MemoryMonitor); |
| 31 }; | 31 }; |
| 32 | 32 |
| 33 // Factory function for creating a monitor for the current platform. | 33 // Factory function for creating a monitor for the current platform. |
| 34 MEMORY_COORDINATOR_EXPORT std::unique_ptr<MemoryMonitor> CreateMemoryMonitor(); | 34 CONTENT_EXPORT std::unique_ptr<MemoryMonitor> CreateMemoryMonitor(); |
| 35 | 35 |
| 36 } // namespace memory_coordinator | 36 } // namespace content |
| 37 | 37 |
| 38 #endif // COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_MONITOR_H_ | 38 #endif // CONTENT_BROWSER_MEMORY_BROWSER_MEMORY_MONITOR_H_ |
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