mdw@git.distorted.org.uk Git - disorder/blob - server/trackdb-int.h

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2005, 2007 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #ifndef TRACKDB_INT_H
  22 #define TRACKDB_INT_H
  23
  24 extern DB_ENV *trackdb_env;
  25
  26 extern DB *trackdb_tracksdb;
  27 extern DB *trackdb_prefsdb;
  28 extern DB *trackdb_searchdb;
  29 extern DB *trackdb_tagsdb;
  30 extern DB *trackdb_noticeddb;
  31 extern DB *trackdb_globaldb;
  32
  33 DBC *trackdb_opencursor(DB *db, DB_TXN *tid);
  34 /* open a transaction */
  35
  36 int trackdb_closecursor(DBC *c);
  37 /* close transaction, returns 0 or DB_LOCK_DEADLOCK */
  38
  39 int trackdb_notice(const char *track,
  40                    const char *path);
  41 int trackdb_notice_tid(const char *track,
  42                        const char *path,
  43                        DB_TXN *tid);
  44 /* notice a track; return DB_NOTFOUND if new, else 0.  _tid can return
  45  * DB_LOCK_DEADLOCK too. */
  46
  47 int trackdb_obsolete(const char *track, DB_TXN *tid);
  48 /* obsolete a track */
  49
  50 DB_TXN *trackdb_begin_transaction(void);
  51 void trackdb_abort_transaction(DB_TXN *tid);
  52 void trackdb_commit_transaction(DB_TXN *tid);
  53 /* begin, abort or commit a transaction */
  54
  55 int trackdb_getdata(DB *db,
  56                     const char *track,
  57                     struct kvp **kp,
  58                     DB_TXN *tid);
  59 /* fetch and decode a database entry.  Returns 0, DB_NOTFOUND or
  60  * DB_LOCK_DEADLOCK. */
  61
  62 int trackdb_putdata(DB *db,
  63                     const char *track,
  64                     const struct kvp *k,
  65                     DB_TXN *tid,
  66                     u_int32_t flags);
  67 /* encode and store a database entry.  Returns 0, DB_KEYEXIST or
  68  * DB_LOCK_DEADLOCK. */
  69
  70 int trackdb_delkey(DB *db,
  71                    const char *track,
  72                    DB_TXN *tid);
  73 /* delete a database entry.  Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
  74
  75 int trackdb_delkeydata(DB *db,
  76                        const char *word,
  77                        const char *track,
  78                        DB_TXN *tid);
  79 /* delete a (key,data) pair.  Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
  80
  81 int trackdb_scan(const char *root,
  82                  int (*callback)(const char *track,
  83                                  struct kvp *data,
  84                                  void *u,
  85                                  DB_TXN *tid),
  86                  void *u,
  87                  DB_TXN *tid);
  88 /* Call CALLBACK for each non-alias track below ROOT (or all tracks if ROOT is
  89  * 0).  Return 0 or DB_LOCK_DEADLOCK.  CALLBACK should return 0 on success or
  90  * EINTR to cancel the scan. */
  91
  92 /* fill KEY in with S, returns KEY */
  93
  94 static inline DBT *make_key(DBT *key, const char *s) {
  95   memset(key, 0, sizeof *key);
  96   key->data = (void *)s;
  97   key->size = strlen(s);
  98   return key;
  99 }
 100
 101 /* set DATA up to receive data, returns DATA */
 102 static inline DBT *prepare_data(DBT *data) {
 103   memset(data, 0, sizeof *data);
 104   data->flags = DB_DBT_MALLOC;
 105   return data;
 106 }
 107
 108 /* encode K and store in DATA, returns DATA */
 109 static inline DBT *encode_data(DBT *data, const struct kvp *k) {
 110   size_t size;
 111
 112   memset(data, 0, sizeof *data);
 113   data->data = kvp_urlencode(k, &size);
 114   data->size = size;
 115   return data;
 116 }
 117
 118 int trackdb_set_global_tid(const char *name,
 119                            const char *value,
 120                            DB_TXN *tid);
 121 int trackdb_get_global_tid(const char *name,
 122                            DB_TXN *tid,
 123                            const char **rp);
 124
 125 #endif /* TRACKDB_INT_H */
 126
 127 /*
 128 Local Variables:
 129 c-basic-offset:2
 130 comment-column:40
 131 fill-column:79
 132 indent-tabs-mode:nil
 133 End:
 134 */