genode/repos/os/include/vfs/vfs_handle.h
2014-10-10 13:02:28 +02:00

65 lines
1.3 KiB
C++

/*
* \brief Representation of an open file
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__VFS_HANDLE_H_
#define _INCLUDE__VFS__VFS_HANDLE_H_
#include <vfs/file_io_service.h>
#include <vfs/directory_service.h>
namespace Vfs { class Vfs_handle; }
class Vfs::Vfs_handle
{
private:
Directory_service &_ds;
File_io_service &_fs;
int _status_flags;
file_size _seek;
public:
enum { STATUS_RDONLY = 0, STATUS_WRONLY = 1, STATUS_RDWR = 2 };
Vfs_handle(Directory_service &ds, File_io_service &fs, int status_flags)
:
_ds(ds), _fs(fs), _status_flags(status_flags), _seek(0)
{ }
virtual ~Vfs_handle() { }
Directory_service &ds() { return _ds; }
File_io_service &fs() { return _fs; }
int status_flags() const { return _status_flags; }
/**
* Return seek offset in bytes
*/
file_size seek() const { return _seek; }
/**
* Set seek offset in bytes
*/
void seek(file_offset seek) { _seek = seek; }
/**
* Advance seek offset by 'incr' bytes
*/
void advance_seek(file_size incr) { _seek += incr; }
};
#endif /* _INCLUDE__VFS__VFS_HANDLE_H_ */