Merge Chromium + Blink git repositories
[chromium-blink-merge.git] / extensions / browser / api / system_storage / storage_info_provider.h
blob6cb178752b8e9db29f221feb243fa944efcd067d
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.
5 #ifndef EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_
6 #define EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_
8 #include <set>
10 #include "base/lazy_instance.h"
11 #include "base/memory/ref_counted.h"
12 #include "base/observer_list_threadsafe.h"
13 #include "extensions/browser/api/system_info/system_info_provider.h"
14 #include "extensions/common/api/system_storage.h"
16 namespace storage_monitor {
17 class StorageInfo;
20 namespace extensions {
22 namespace systeminfo {
24 // Build StorageUnitInfo struct from StorageInfo instance. The |unit|
25 // parameter is the output value.
26 void BuildStorageUnitInfo(const storage_monitor::StorageInfo& info,
27 api::system_storage::StorageUnitInfo* unit);
29 } // namespace systeminfo
31 typedef std::vector<linked_ptr<api::system_storage::StorageUnitInfo>>
32 StorageUnitInfoList;
34 class StorageInfoProvider : public SystemInfoProvider {
35 public:
36 typedef base::Callback<void(const std::string&, double)>
37 GetStorageFreeSpaceCallback;
39 // Get the single shared instance of StorageInfoProvider.
40 static StorageInfoProvider* Get();
42 // SystemInfoProvider implementations
43 void PrepareQueryOnUIThread() override;
44 void InitializeProvider(const base::Closure& do_query_info_callback) override;
46 virtual double GetStorageFreeSpaceFromTransientIdOnFileThread(
47 const std::string& transient_id);
49 const StorageUnitInfoList& storage_unit_info_list() const;
51 static void InitializeForTesting(scoped_refptr<StorageInfoProvider> provider);
53 protected:
54 StorageInfoProvider();
56 ~StorageInfoProvider() override;
58 // Put all available storages' information into |info_|.
59 void GetAllStoragesIntoInfoList();
61 // The last information filled up by QueryInfo and is accessed on multiple
62 // threads, but the whole class is being guarded by SystemInfoProvider base
63 // class.
65 // |info_| is accessed on the UI thread while |is_waiting_for_completion_| is
66 // false and on the sequenced worker pool while |is_waiting_for_completion_|
67 // is true.
68 StorageUnitInfoList info_;
70 private:
71 // SystemInfoProvider implementations.
72 // Override to query the available capacity of all known storage devices on
73 // the blocking pool, including fixed and removable devices.
74 bool QueryInfo() override;
76 static base::LazyInstance<scoped_refptr<StorageInfoProvider> > provider_;
78 DISALLOW_COPY_AND_ASSIGN(StorageInfoProvider);
81 } // namespace extensions
83 #endif // EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_