| // 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 EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_ |
| #define EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_ |
| |
| #include <set> |
| |
| #include "base/lazy_instance.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/observer_list_threadsafe.h" |
| #include "extensions/browser/api/system_info/system_info_provider.h" |
| #include "extensions/common/api/system_storage.h" |
| |
| namespace storage_monitor { |
| class StorageInfo; |
| } |
| |
| namespace extensions { |
| |
| namespace systeminfo { |
| |
| // Build StorageUnitInfo struct from StorageInfo instance. The |unit| |
| // parameter is the output value. |
| void BuildStorageUnitInfo(const storage_monitor::StorageInfo& info, |
| api::system_storage::StorageUnitInfo* unit); |
| |
| } // namespace systeminfo |
| |
| typedef std::vector<api::system_storage::StorageUnitInfo> StorageUnitInfoList; |
| |
| class StorageInfoProvider : public SystemInfoProvider { |
| public: |
| typedef base::Callback<void(const std::string&, double)> |
| GetStorageFreeSpaceCallback; |
| |
| // Get the single shared instance of StorageInfoProvider. |
| static StorageInfoProvider* Get(); |
| |
| // SystemInfoProvider implementations |
| void PrepareQueryOnUIThread() override; |
| void InitializeProvider(const base::Closure& do_query_info_callback) override; |
| |
| virtual double GetStorageFreeSpaceFromTransientIdAsync( |
| const std::string& transient_id); |
| |
| const StorageUnitInfoList& storage_unit_info_list() const { return info_; } |
| |
| static void InitializeForTesting(scoped_refptr<StorageInfoProvider> provider); |
| |
| protected: |
| StorageInfoProvider(); |
| |
| ~StorageInfoProvider() override; |
| |
| // Put all available storages' information into |info_|. |
| void GetAllStoragesIntoInfoList(); |
| |
| // The last information filled up by QueryInfo and is accessed on multiple |
| // threads, but the whole class is being guarded by SystemInfoProvider base |
| // class. |
| // |
| // |info_| is accessed on the UI thread while |is_waiting_for_completion_| is |
| // false and on the sequenced worker pool while |is_waiting_for_completion_| |
| // is true. |
| StorageUnitInfoList info_; |
| |
| private: |
| // SystemInfoProvider implementations. |
| // Override to query the available capacity of all known storage devices on |
| // the blocking pool, including fixed and removable devices. |
| bool QueryInfo() override; |
| |
| static base::LazyInstance< |
| scoped_refptr<StorageInfoProvider>>::DestructorAtExit provider_; |
| |
| DISALLOW_COPY_AND_ASSIGN(StorageInfoProvider); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_ |