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

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2005 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
  30 DBC *trackdb_opencursor(DB *db, DB_TXN *tid);
  31 /* open a transaction */
  32
  33 int trackdb_closecursor(DBC *c);
  34 /* close transaction, returns 0 or DB_LOCK_DEADLOCK */
  35
  36 int trackdb_notice(const char *track,
  37                    const char *path);
  38 int trackdb_notice_tid(const char *track,
  39                        const char *path,
  40                        DB_TXN *tid);
  41 /* notice a track; return DB_NOTFOUND if new, else 0.  _tid can return
  42  * DB_LOCK_DEADLOCK too. */
  43
  44 int trackdb_obsolete(const char *track, DB_TXN *tid);
  45 /* obsolete a track */
  46
  47 DB_TXN *trackdb_begin_transaction(void);
  48 void trackdb_abort_transaction(DB_TXN *tid);
  49 void trackdb_commit_transaction(DB_TXN *tid);
  50 /* begin, abort or commit a transaction */
  51
  52 int trackdb_getdata(DB *db,
  53                     const char *track,
  54                     struct kvp **kp,
  55                     DB_TXN *tid);
  56 /* fetch and decode a database entry.  Returns 0, DB_NOTFOUND or
  57  * DB_LOCK_DEADLOCK. */
  58
  59 int trackdb_putdata(DB *db,
  60                     const char *track,
  61                     const struct kvp *k,
  62                     DB_TXN *tid,
  63                     u_int32_t flags);
  64 /* encode and store a database entry.  Returns 0, DB_KEYEXIST or
  65  * DB_LOCK_DEADLOCK. */
  66
  67 int trackdb_delkey(DB *db,
  68                    const char *track,
  69                    DB_TXN *tid);
  70 /* delete a database entry.  Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
  71
  72 int trackdb_delkeydata(DB *db,
  73                        const char *word,
  74                        const char *track,
  75                        DB_TXN *tid);
  76 /* delete a (key,data) pair.  Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
  77
  78 int trackdb_scan(const char *root,
  79                  int (*callback)(const char *track,
  80                                  struct kvp *data,
  81                                  void *u,
  82                                  DB_TXN *tid),
  83                  void *u,
  84                  DB_TXN *tid);
  85 /* Call CALLBACK for each non-alias track below ROOT.  Return 0 or
  86  * DB_LOCK_DEADLOCK.  CALLBACK should return 0 on success or EINTR to cancel
  87  * the scan. */
  88
  89 /* fill KEY in with S, returns KEY */
  90 static inline DBT *make_key(DBT *key, const char *s) {
  91   memset(key, 0, sizeof *key);
  92   key->data = (void *)s;
  93   key->size = strlen(s);
  94   return key;
  95 }
  96
  97 /* set DATA up to receive data, returns DATA */
  98 static inline DBT *prepare_data(DBT *data) {
  99   memset(data, 0, sizeof *data);
 100   data->flags = DB_DBT_MALLOC;
 101   return data;
 102 }
 103
 104 /* encode K and store in DATA, returns DATA */
 105 static inline DBT *encode_data(DBT *data, const struct kvp *k) {
 106   size_t size;
 107
 108   memset(data, 0, sizeof *data);
 109   data->data = kvp_urlencode(k, &size);
 110   data->size = size;
 111   return data;
 112 }
 113
 114 #endif /* TRACKDB_INT_H */
 115
 116 /*
 117 Local Variables:
 118 c-basic-offset:2
 119 comment-column:40
 120 fill-column:79
 121 indent-tabs-mode:nil
 122 End:
 123 */
 124 /* arch-tag:BJ2D2N4ftvK2bQRnaLuFIg */