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// Copyright 2013 The Chromium Authors
// 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/memory/scoped_refptr.h"
#include "extensions/browser/api/system_info/system_info_provider.h"
#include "extensions/common/api/system_storage.h"
namespace extensions {
typedef std::vector<api::system_storage::StorageUnitInfo> StorageUnitInfoList;
class StorageInfoProvider : public SystemInfoProvider {
public:
StorageInfoProvider(const StorageInfoProvider&) = delete;
StorageInfoProvider& operator=(const StorageInfoProvider&) = delete;
// Get the single shared instance of StorageInfoProvider.
static StorageInfoProvider* Get();
// SystemInfoProvider implementations
void PrepareQueryOnUIThread() override;
void InitializeProvider(base::OnceClosure 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_;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_STORAGE_INFO_PROVIDER_H_
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