blob: cb3706491047be4372174fa58b31b013f9c8365d [file] [log] [blame]
// 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 STORAGE_BROWSER_FILEAPI_OPEN_FILE_HANDLE_CONTEXT_H_
#define STORAGE_BROWSER_FILEAPI_OPEN_FILE_HANDLE_CONTEXT_H_
#include <map>
#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "storage/browser/storage_browser_export.h"
#include "storage/common/fileapi/file_system_types.h"
#include "url/gurl.h"
namespace storage {
class QuotaReservationBuffer;
// This class represents a underlying file of a managed FileSystem file.
// The instance keeps alive while at least one consumer keeps an open file
// handle.
// This class is usually manipulated only via OpenFileHandle.
class OpenFileHandleContext : public base::RefCounted<OpenFileHandleContext> {
public:
OpenFileHandleContext(const base::FilePath& platform_path,
QuotaReservationBuffer* reservation_buffer);
// Updates the max written offset and returns the amount of growth.
int64 UpdateMaxWrittenOffset(int64 offset);
void AddAppendModeWriteAmount(int64 amount);
const base::FilePath& platform_path() const {
return platform_path_;
}
int64 GetEstimatedFileSize() const;
int64 GetMaxWrittenOffset() const;
private:
friend class base::RefCounted<OpenFileHandleContext>;
virtual ~OpenFileHandleContext();
int64 initial_file_size_;
int64 maximum_written_offset_;
int64 append_mode_write_amount_;
base::FilePath platform_path_;
scoped_refptr<QuotaReservationBuffer> reservation_buffer_;
base::SequenceChecker sequence_checker_;
DISALLOW_COPY_AND_ASSIGN(OpenFileHandleContext);
};
} // namespace storage
#endif // STORAGE_BROWSER_FILEAPI_OPEN_FILE_HANDLE_CONTEXT_H_