mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-11-18 09:19:17 +01:00
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
|
|
* cache.h : deal with indexed LRU caches
|
|
*
|
|
* Copyright (c) 2008-2009 Jean-Pierre Andre
|
|
*
|
|
* This program/include file is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as published
|
|
* by the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program/include file is distributed in the hope that it will be
|
|
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program (in the main directory of the NTFS-3G
|
|
* distribution in the file COPYING); if not, write to the Free Software
|
|
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _NTFS_CACHE_H_
|
|
#define _NTFS_CACHE_H_
|
|
|
|
#include "volume.h"
|
|
|
|
struct CACHED_GENERIC
|
|
{
|
|
struct CACHED_GENERIC *next;
|
|
struct CACHED_GENERIC *previous;
|
|
void *variable;
|
|
size_t varsize;
|
|
union
|
|
{
|
|
/* force alignment for pointers and u64 */
|
|
u64 u64align;
|
|
void *ptralign;
|
|
} fixed[0];
|
|
} ;
|
|
|
|
struct CACHED_INODE
|
|
{
|
|
struct CACHED_INODE *next;
|
|
struct CACHED_INODE *previous;
|
|
const char *pathname;
|
|
size_t varsize;
|
|
/* above fields must match "struct CACHED_GENERIC" */
|
|
u64 inum;
|
|
} ;
|
|
|
|
struct CACHED_NIDATA
|
|
{
|
|
struct CACHED_NIDATA *next;
|
|
struct CACHED_NIDATA *previous;
|
|
const char *pathname; /* not used */
|
|
size_t varsize; /* not used */
|
|
/* above fields must match "struct CACHED_GENERIC" */
|
|
u64 inum;
|
|
ntfs_inode *ni;
|
|
} ;
|
|
|
|
struct CACHED_LOOKUP
|
|
{
|
|
struct CACHED_LOOKUP *next;
|
|
struct CACHED_LOOKUP *previous;
|
|
const char *name;
|
|
size_t namesize;
|
|
/* above fields must match "struct CACHED_GENERIC" */
|
|
u64 parent;
|
|
u64 inum;
|
|
} ;
|
|
|
|
enum
|
|
{
|
|
CACHE_FREE = 1,
|
|
CACHE_NOHASH = 2
|
|
} ;
|
|
|
|
typedef int ( *cache_compare )( const struct CACHED_GENERIC *cached,
|
|
const struct CACHED_GENERIC *item );
|
|
typedef void ( *cache_free )( const struct CACHED_GENERIC *cached );
|
|
typedef int ( *cache_hash )( const struct CACHED_GENERIC *cached );
|
|
|
|
struct HASH_ENTRY
|
|
{
|
|
struct HASH_ENTRY *next;
|
|
struct CACHED_GENERIC *entry;
|
|
} ;
|
|
|
|
struct CACHE_HEADER
|
|
{
|
|
const char *name;
|
|
struct CACHED_GENERIC *most_recent_entry;
|
|
struct CACHED_GENERIC *oldest_entry;
|
|
struct CACHED_GENERIC *free_entry;
|
|
struct HASH_ENTRY *free_hash;
|
|
struct HASH_ENTRY **first_hash;
|
|
cache_free dofree;
|
|
cache_hash dohash;
|
|
unsigned long reads;
|
|
unsigned long writes;
|
|
unsigned long hits;
|
|
int fixed_size;
|
|
int max_hash;
|
|
struct CACHED_GENERIC entry[0];
|
|
} ;
|
|
|
|
/* cast to generic, avoiding gcc warnings */
|
|
#define GENERIC(pstr) ((const struct CACHED_GENERIC*)(const void*)(pstr))
|
|
|
|
struct CACHED_GENERIC *ntfs_fetch_cache( struct CACHE_HEADER *cache,
|
|
const struct CACHED_GENERIC *wanted,
|
|
cache_compare compare );
|
|
struct CACHED_GENERIC *ntfs_enter_cache( struct CACHE_HEADER *cache,
|
|
const struct CACHED_GENERIC *item,
|
|
cache_compare compare );
|
|
int ntfs_invalidate_cache( struct CACHE_HEADER *cache,
|
|
const struct CACHED_GENERIC *item,
|
|
cache_compare compare, int flags );
|
|
int ntfs_remove_cache( struct CACHE_HEADER *cache,
|
|
struct CACHED_GENERIC *item, int flags );
|
|
|
|
void ntfs_create_lru_caches( ntfs_volume *vol );
|
|
void ntfs_free_lru_caches( ntfs_volume *vol );
|
|
|
|
#endif /* _NTFS_CACHE_H_ */
|
|
|