usbloadergx/source/libs/libext2fs/ext2_io.h
dimok321 18a26d7e1a *Fixed booting games for huge ext2/3/4 drives
*Rewrote complete main menu function
*Moved ext2/3/4 disc cache to mem2 as on FAT/NTFS (added ext2 as custom lib due to that)
*Added missing header files from R1011 for ext support
*Fixed crash on Numpad when pressing a button
*Fixed boot of WiiMC
*Changed SVN line ending to LF (Unix style)
2010-12-12 16:31:13 +00:00

137 lines
4.0 KiB
C

/*
* io.h --- the I/O manager abstraction
*
* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
#ifndef _EXT2FS_EXT2_IO_H
#define _EXT2FS_EXT2_IO_H
#include "ext2fs.h"
/*
* ext2_loff_t is defined here since unix_io.c needs it.
*/
typedef long long ext2_loff_t;
/* llseek.c */
ext2_loff_t ext2fs_llseek (int, ext2_loff_t, int);
typedef struct struct_io_manager *io_manager;
typedef struct struct_io_channel *io_channel;
typedef struct struct_io_stats *io_stats;
#define CHANNEL_FLAGS_WRITETHROUGH 0x01
struct struct_io_channel {
errcode_t magic;
io_manager manager;
char *name;
int block_size;
errcode_t (*read_error)(io_channel channel,
unsigned long block,
int count,
void *data,
size_t size,
int actual_bytes_read,
errcode_t error);
errcode_t (*write_error)(io_channel channel,
unsigned long block,
int count,
const void *data,
size_t size,
int actual_bytes_written,
errcode_t error);
int refcount;
int flags;
long reserved[14];
void *private_data;
void *app_data;
};
struct struct_io_stats {
int num_fields;
int reserved;
unsigned long long bytes_read;
unsigned long long bytes_written;
};
struct struct_io_manager {
errcode_t magic;
const char *name;
errcode_t (*open)(const char *name, int flags, io_channel *channel);
errcode_t (*close)(io_channel channel);
errcode_t (*set_blksize)(io_channel channel, int blksize);
errcode_t (*read_blk)(io_channel channel, unsigned long block,
int count, void *data);
errcode_t (*write_blk)(io_channel channel, unsigned long block,
int count, const void *data);
errcode_t (*flush)(io_channel channel);
errcode_t (*write_byte)(io_channel channel, unsigned long offset,
int count, const void *data);
errcode_t (*set_option)(io_channel channel, const char *option,
const char *arg);
errcode_t (*get_stats)(io_channel channel, io_stats *io_stats);
errcode_t (*read_blk64)(io_channel channel, unsigned long long block,
int count, void *data);
errcode_t (*write_blk64)(io_channel channel, unsigned long long block,
int count, const void *data);
long reserved[16];
};
#define IO_FLAG_RW 0x0001
#define IO_FLAG_EXCLUSIVE 0x0002
#define IO_FLAG_DIRECT_IO 0x0004
/*
* Convenience functions....
*/
#define io_channel_close(c) ((c)->manager->close((c)))
#define io_channel_set_blksize(c,s) ((c)->manager->set_blksize((c),s))
#define io_channel_read_blk(c,b,n,d) ((c)->manager->read_blk((c),b,n,d))
#define io_channel_write_blk(c,b,n,d) ((c)->manager->write_blk((c),b,n,d))
#define io_channel_flush(c) ((c)->manager->flush((c)))
#define io_channel_bumpcount(c) ((c)->refcount++)
/* io_manager.c */
extern errcode_t io_channel_set_options(io_channel channel,
const char *options);
extern errcode_t io_channel_write_byte(io_channel channel,
unsigned long offset,
int count, const void *data);
extern errcode_t io_channel_read_blk64(io_channel channel,
unsigned long long block,
int count, void *data);
extern errcode_t io_channel_write_blk64(io_channel channel,
unsigned long long block,
int count, const void *data);
/* unix_io.c */
extern io_manager unix_io_manager;
/* undo_io.c */
extern io_manager undo_io_manager;
extern errcode_t set_undo_io_backing_manager(io_manager manager);
extern errcode_t set_undo_io_backup_file(char *file_name);
/* test_io.c */
extern io_manager test_io_manager, test_io_backing_manager;
extern void (*test_io_cb_read_blk)
(unsigned long block, int count, errcode_t err);
extern void (*test_io_cb_write_blk)
(unsigned long block, int count, errcode_t err);
extern void (*test_io_cb_read_blk64)
(unsigned long long block, int count, errcode_t err);
extern void (*test_io_cb_write_blk64)
(unsigned long long block, int count, errcode_t err);
extern void (*test_io_cb_set_blksize)
(int blksize, errcode_t err);
#endif /* _EXT2FS_EXT2_IO_H */