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_noticeddb;
  30
  31 DBC *trackdb_opencursor(DB *db, DB_TXN *tid);
  32 /* open a transaction */
  33
  34 int trackdb_closecursor(DBC *c);
  35 /* close transaction, returns 0 or DB_LOCK_DEADLOCK */
  36
  37 int trackdb_notice(const char *track,
  38                    const char *path);
  39 int trackdb_notice_tid(const char *track,
  40                        const char *path,
  41                        DB_TXN *tid);
  42 /* notice a track; return DB_NOTFOUND if new, else 0.  _tid can return
  43  * DB_LOCK_DEADLOCK too. */
  44
  45 int trackdb_obsolete(const char *track, DB_TXN *tid);
  46 /* obsolete a track */
  47
  48 DB_TXN *trackdb_begin_transaction(void);
  49 void trackdb_abort_transaction(DB_TXN *tid);
  50 void trackdb_commit_transaction(DB_TXN *tid);
  51 /* begin, abort or commit a transaction */
  52
  53 int trackdb_getdata(DB *db,
  54                     const char *track,
  55                     struct kvp **kp,
  56                     DB_TXN *tid);
  57 /* fetch and decode a database entry.  Returns 0, DB_NOTFOUND or
  58  * DB_LOCK_DEADLOCK. */
  59
  60 int trackdb_putdata(DB *db,
  61                     const char *track,
  62                     const struct kvp *k,
  63                     DB_TXN *tid,
  64                     u_int32_t flags);
  65 /* encode and store a database entry.  Returns 0, DB_KEYEXIST or
  66  * DB_LOCK_DEADLOCK. */
  67
  68 int trackdb_delkey(DB *db,
  69                    const char *track,
  70                    DB_TXN *tid);
  71 /* delete a database entry.  Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
  72
  73 int trackdb_delkeydata(DB *db,
  74                        const char *word,
  75                        const char *track,
  76                        DB_TXN *tid);
  77 /* delete a (key,data) pair.  Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
  78
  79 int trackdb_scan(const char *root,
  80                  int (*callback)(const char *track,
  81                                  struct kvp *data,
  82                                  void *u,
  83                                  DB_TXN *tid),
  84                  void *u,
  85                  DB_TXN *tid);
  86 /* Call CALLBACK for each non-alias track below ROOT (or all tracks if ROOT is
  87  * 0).  Return 0 or DB_LOCK_DEADLOCK.  CALLBACK should return 0 on success or
  88  * EINTR to cancel the scan. */
  89
  90 /* fill KEY in with S, returns KEY */
  91
  92 static inline DBT *make_key(DBT *key, const char *s) {
  93   memset(key, 0, sizeof *key);
  94   key->data = (void *)s;
  95   key->size = strlen(s);
  96   return key;
  97 }
  98
  99 /* set DATA up to receive data, returns DATA */
 100 static inline DBT *prepare_data(DBT *data) {
 101   memset(data, 0, sizeof *data);
 102   data->flags = DB_DBT_MALLOC;
 103   return data;
 104 }
 105
 106 /* encode K and store in DATA, returns DATA */
 107 static inline DBT *encode_data(DBT *data, const struct kvp *k) {
 108   size_t size;
 109
 110   memset(data, 0, sizeof *data);
 111   data->data = kvp_urlencode(k, &size);
 112   data->size = size;
 113   return data;
 114 }
 115
 116 int trackdb_set_global_tid(const char *name,
 117                            const char *value,
 118                            DB_TXN *tid);
 119 int trackdb_get_global_tid(const char *name,
 120                            DB_TXN *tid,
 121                            const char **rp);
 122
 123 #endif /* TRACKDB_INT_H */
 124
 125 /*
 126 Local Variables:
 127 c-basic-offset:2
 128 comment-column:40
 129 fill-column:79
 130 indent-tabs-mode:nil
 131 End:
 132 */