firmware/include/dircache.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Miika Pekkarinen
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _DIRCACHE_H
  22 #define _DIRCACHE_H
  23
  24 #include "config.h"
  25 #include "dir_uncached.h"
  26
  27 #ifdef HAVE_DIRCACHE
  28
  29 #define DIRCACHE_RESERVE  (1024*64)
  30 #define DIRCACHE_LIMIT    (1024*1024*6)
  31
  32 #define DIRCACHE_APPFLAG_TAGCACHE  0x0001
  33
  34 /* Internal structures. */
  35 struct travel_data {
  36     struct dircache_entry *first;
  37     struct dircache_entry *ce;
  38     struct dircache_entry *down_entry;
  39 #if (CONFIG_PLATFORM & PLATFORM_HOSTED)
  40     DIR_UNCACHED *dir, *newdir;
  41     struct dirent_uncached *entry;
  42 #else
  43     struct fat_dir *dir;
  44     struct fat_dir newdir;
  45     struct fat_direntry entry;
  46 #endif
  47     int pathpos;
  48 };
  49
  50 #define DIRCACHE_MAGIC  0x00d0c0a1
  51 struct dircache_maindata {
  52     long magic;
  53     long size;
  54     long entry_count;
  55     long appflags;
  56     struct dircache_entry *root_entry;
  57     char *d_names_start;
  58 };
  59
  60 #define MAX_PENDING_BINDINGS 2
  61 struct fdbind_queue {
  62     char path[MAX_PATH];
  63     int fd;
  64 };
  65
  66 /* Exported structures. */
  67 struct dircache_entry {
  68     struct dirinfo info;
  69     struct dircache_entry *next;
  70     struct dircache_entry *up;
  71     struct dircache_entry *down;
  72     long startcluster;
  73     char *d_name;
  74 };
  75
  76 struct dirent_cached {
  77     struct dirinfo info;
  78     char *d_name;
  79     long startcluster;
  80 };
  81
  82 typedef struct {
  83     bool busy;
  84     struct dirent_cached theent; /* .attribute is set to -1 on init(opendir) */
  85     struct dircache_entry *internal_entry; /* the current entry in the directory */
  86     DIR_UNCACHED *regulardir;
  87 } DIR_CACHED;
  88
  89 void dircache_init(void) INIT_ATTR;
  90 int dircache_load(void);
  91 int dircache_save(void);
  92 int dircache_build(int last_size);
  93 void* dircache_steal_buffer(long *size);
  94 bool dircache_is_enabled(void);
  95 bool dircache_is_initializing(void);
  96 void dircache_set_appflag(long mask);
  97 bool dircache_get_appflag(long mask);
  98 int dircache_get_entry_count(void);
  99 int dircache_get_cache_size(void);
 100 int dircache_get_reserve_used(void);
 101 int dircache_get_build_ticks(void);
 102 void dircache_disable(void);
 103 const struct dircache_entry *dircache_get_entry_ptr(const char *filename);
 104 size_t dircache_copy_path(const struct dircache_entry *entry, char *buf, size_t size);
 105
 106 void dircache_bind(int fd, const char *path);
 107 void dircache_update_filesize(int fd, long newsize, long startcluster);
 108 void dircache_update_filetime(int fd);
 109 void dircache_mkdir(const char *path);
 110 void dircache_rmdir(const char *path);
 111 void dircache_remove(const char *name);
 112 void dircache_rename(const char *oldpath, const char *newpath);
 113 void dircache_add_file(const char *path, long startcluster);
 114
 115 DIR_CACHED* opendir_cached(const char* name);
 116 struct dirent_cached* readdir_cached(DIR_CACHED* dir);
 117 int closedir_cached(DIR_CACHED *dir);
 118 int mkdir_cached(const char *name);
 119 int rmdir_cached(const char* name);
 120 #endif /* !HAVE_DIRCACHE */
 121
 122 #endif