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Implemented directory caching. No more waiting for disk to spin up while

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browsing when cache is enabled (system -> disk -> enable directory
cache). Cache building on boot is transparent except the first boot.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7588 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Miika Pekkarinen 2005-10-07 17:38:05 +00:00
parent 86e31d5558
commit ab78b04680
15 changed files with 1068 additions and 21 deletions
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96
firmware/include/dircache.h Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Miika Pekkarinen
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _DIRCACHE_H
#define _DIRCACHE_H
#include "dir.h"
#ifdef HAVE_DIRCACHE
#define DIRCACHE_RESERVE (1024*64)
#define DIRCACHE_LIMIT (1024*1024*2)
#define DIRCACHE_FILE ROCKBOX_DIR "/dircache.dat"
/* Internal structures. */
struct travel_data {
struct dircache_entry *ce;
struct dircache_entry *down_entry;
struct fat_dir *dir;
struct fat_dir newdir;
struct fat_direntry entry;
int pathpos;
};
#define DIRCACHE_MAGIC 0x00d0c0a0
struct dircache_maindata {
long magic;
long size;
struct dircache_entry *root_entry;
};
/* Exported structures. */
struct dircache_entry {
struct dircache_entry *next;
struct dircache_entry *down;
int attribute;
long size;
long startcluster;
unsigned short wrtdate;
unsigned short wrttime;
unsigned char name_len;
char *d_name;
};
typedef struct {
bool busy;
struct dircache_entry *entry;
struct dircache_entry secondary_entry;
DIR *regulardir;
} DIRCACHED;
void dircache_init(void);
int dircache_load(const char *path);
int dircache_save(const char *path);
int dircache_build(int last_size);
bool dircache_is_enabled(void);
int dircache_get_cache_size(void);
void dircache_disable(void);
void dircache_bind(int fd, const char *path);
void dircache_update_filesize(int fd, long newsize);
void dircache_mkdir(const char *path);
void dircache_rmdir(const char *path);
void dircache_remove(const char *name);
void dircache_rename(const char *oldpath, const char *newpath);
void dircache_add_file(const char *path);
DIRCACHED* opendir_cached(const char* name);
struct dircache_entry* readdir_cached(DIRCACHED* dir);
int closedir_cached(DIRCACHED *dir);
#else /* HAVE_DIRCACHE */
# define DIRCACHED DIR
# define dircache_entry dirent
# define opendir_cached opendir
# define closedir_cached closedir
# define readdir_cached readdir
# define closedir_cached closedir
#endif /* !HAVE_DIRCACHE */
#endif