Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 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 CHROME_BROWSER_EXTENSIONS_API_SYSTEM_MEMORY_MEMORY_INFO_PROVIDER_H_ |
| 6 | #define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_MEMORY_MEMORY_INFO_PROVIDER_H_ |
| 7 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 8 | #include "base/lazy_instance.h" |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 9 | #include "chrome/browser/extensions/api/system_info/system_info_provider.h" |
| 10 | #include "chrome/common/extensions/api/system_memory.h" |
| 11 | |
| 12 | namespace extensions { |
| 13 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 14 | class MemoryInfoProvider : public SystemInfoProvider { |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 15 | public: |
| 16 | static MemoryInfoProvider* Get(); |
| 17 | |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 18 | const api::system_memory::MemoryInfo& memory_info() const; |
| 19 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 20 | static void InitializeForTesting(scoped_refptr<MemoryInfoProvider> provider); |
| 21 | |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 22 | private: |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 23 | friend class MockMemoryInfoProviderImpl; |
| 24 | |
| 25 | MemoryInfoProvider(); |
| 26 | virtual ~MemoryInfoProvider(); |
| 27 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 28 | // Overriden from SystemInfoProvider. |
| 29 | virtual bool QueryInfo() OVERRIDE; |
| 30 | |
| 31 | // The last information filled up by QueryInfo and is accessed on multiple |
| 32 | // threads, but the whole class is being guarded by SystemInfoProvider base |
| 33 | // class. |
| 34 | // |
| 35 | // |info_| is accessed on the UI thread while |is_waiting_for_completion_| is |
| 36 | // false and on the sequenced worker pool while |is_waiting_for_completion_| |
| 37 | // is true. |
| 38 | api::system_memory::MemoryInfo info_; |
| 39 | |
| 40 | static base::LazyInstance<scoped_refptr<MemoryInfoProvider> > provider_; |
| 41 | |
Ben Murdoch | a3f7b4e | 2013-07-24 10:36:34 +0100 | [diff] [blame] | 42 | DISALLOW_COPY_AND_ASSIGN(MemoryInfoProvider); |
| 43 | }; |
| 44 | |
| 45 | } // namespace extensions |
| 46 | |
| 47 | #endif // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_MEMORY_MEMORY_INFO_PROVIDER_H_ |