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// Copyright (c) 2011 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 WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_TRACKER_H_
#define WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_TRACKER_H_
#include <deque>
#include <list>
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "webkit/fileapi/file_system_types.h"
class GURL;
namespace base {
class MessageLoopProxy;
}
namespace fileapi {
// Owned by the FileSystemContext, which is a per-profile instance, and has the
// same lifetime as the FileSystemContext. It's going to be created and
// destroyed on the IO thread in chrome. (The destruction on the same thread
// where it is created was guaranteed by its owner, FileSystemContext.)
class FileSystemUsageTracker {
public:
FileSystemUsageTracker(
scoped_refptr<base::MessageLoopProxy> file_message_loop,
const FilePath& profile_path,
bool is_incognito);
~FileSystemUsageTracker();
// Get the amount of data stored in the filesystem specified by
// |origin_url| and |type|.
typedef Callback1<int64 /* usage */>::Type GetUsageCallback;
void GetOriginUsage(const GURL& origin_url,
fileapi::FileSystemType type,
GetUsageCallback* callback);
private:
class GetUsageTask;
void RegisterUsageTask(GetUsageTask* task);
void UnregisterUsageTask(GetUsageTask* task);
void DidGetOriginUsage(const std::string& fs_name, int64 usage);
scoped_refptr<base::MessageLoopProxy> file_message_loop_;
FilePath base_path_;
bool is_incognito_;
typedef std::deque<GetUsageTask*> UsageTaskQueue;
UsageTaskQueue running_usage_tasks_;
typedef std::list<GetUsageCallback*> PendingCallbackList;
typedef std::map<std::string, PendingCallbackList> PendingUsageCallbackMap;
PendingUsageCallbackMap pending_usage_callbacks_;
DISALLOW_COPY_AND_ASSIGN(FileSystemUsageTracker);
};
} // namespace fileapi
#endif // WEBKIT_FILEAPI_FILE_SYSTEM_USAGE_TRACKER_H_
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