lib/util/util_tdb.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    tdb utility functions
   5
   6    Copyright (C) Andrew Tridgell 1992-2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef _____LIB_UTIL_UTIL_TDB_H__
  23 #define _____LIB_UTIL_UTIL_TDB_H__
  24
  25 /***************************************************************
  26  Make a TDB_DATA and keep the const warning in one place
  27 ****************************************************************/
  28 TDB_DATA make_tdb_data(const uint8_t *dptr, size_t dsize);
  29 bool tdb_data_equal(TDB_DATA t1, TDB_DATA t2);
  30 bool tdb_data_is_empty(TDB_DATA d);
  31 TDB_DATA string_tdb_data(const char *string);
  32 TDB_DATA string_term_tdb_data(const char *string);
  33
  34 /****************************************************************************
  35  Lock a chain by string. Return non-zero if lock failed.
  36 ****************************************************************************/
  37 int tdb_lock_bystring(struct tdb_context *tdb, const char *keyval);
  38
  39 /****************************************************************************
  40  Unlock a chain by string.
  41 ****************************************************************************/
  42 void tdb_unlock_bystring(struct tdb_context *tdb, const char *keyval);
  43
  44 /****************************************************************************
  45  Read lock a chain by string. Return non-zero if lock failed.
  46 ****************************************************************************/
  47 int tdb_read_lock_bystring(struct tdb_context *tdb, const char *keyval);
  48
  49 /****************************************************************************
  50  Read unlock a chain by string.
  51 ****************************************************************************/
  52 void tdb_read_unlock_bystring(struct tdb_context *tdb, const char *keyval);
  53
  54 /****************************************************************************
  55  Fetch a int32_t value by a arbitrary blob key, return -1 if not found.
  56  Output is int32_t in native byte order.
  57 ****************************************************************************/
  58 int32_t tdb_fetch_int32_byblob(struct tdb_context *tdb, TDB_DATA key);
  59
  60 /****************************************************************************
  61  Fetch a int32_t value by string key, return -1 if not found.
  62  Output is int32_t in native byte order.
  63 ****************************************************************************/
  64 int32_t tdb_fetch_int32(struct tdb_context *tdb, const char *keystr);
  65
  66 /****************************************************************************
  67  Store a int32_t value by an arbitrary blob key, return 0 on success, -ve on failure.
  68  Input is int32_t in native byte order. Output in tdb is in little-endian.
  69 ****************************************************************************/
  70 int tdb_store_int32_byblob(struct tdb_context *tdb, TDB_DATA key, int32_t v);
  71
  72 /****************************************************************************
  73  Store a int32_t value by string key, return 0 on success, -ve on failure.
  74  Input is int32_t in native byte order. Output in tdb is in little-endian.
  75 ****************************************************************************/
  76 int tdb_store_int32(struct tdb_context *tdb, const char *keystr, int32_t v);
  77
  78 /****************************************************************************
  79  Fetch a uint32_t value by a arbitrary blob key, return -1 if not found.
  80  Output is uint32_t in native byte order.
  81 ****************************************************************************/
  82 bool tdb_fetch_uint32_byblob(struct tdb_context *tdb, TDB_DATA key, uint32_t *value);
  83
  84 /****************************************************************************
  85  Fetch a uint32_t value by string key, return -1 if not found.
  86  Output is uint32_t in native byte order.
  87 ****************************************************************************/
  88 bool tdb_fetch_uint32(struct tdb_context *tdb, const char *keystr, uint32_t *value);
  89
  90 /****************************************************************************
  91  Store a uint32_t value by an arbitrary blob key, return true on success, false on failure.
  92  Input is uint32_t in native byte order. Output in tdb is in little-endian.
  93 ****************************************************************************/
  94 bool tdb_store_uint32_byblob(struct tdb_context *tdb, TDB_DATA key, uint32_t value);
  95
  96 /****************************************************************************
  97  Store a uint32_t value by string key, return true on success, false on failure.
  98  Input is uint32_t in native byte order. Output in tdb is in little-endian.
  99 ****************************************************************************/
 100 bool tdb_store_uint32(struct tdb_context *tdb, const char *keystr, uint32_t value);
 101
 102 /****************************************************************************
 103  Store a buffer by a null terminated string key.  Return 0 on success, -ve
 104  on failure.
 105 ****************************************************************************/
 106 int tdb_store_bystring(struct tdb_context *tdb, const char *keystr, TDB_DATA data, int flags);
 107
 108 /****************************************************************************
 109  Fetch a buffer using a null terminated string key.  Don't forget to call
 110  free() on the result dptr.
 111 ****************************************************************************/
 112 TDB_DATA tdb_fetch_bystring(struct tdb_context *tdb, const char *keystr);
 113
 114 /****************************************************************************
 115  Delete an entry using a null terminated string key.  0 on success, -ve on err.
 116 ****************************************************************************/
 117 int tdb_delete_bystring(struct tdb_context *tdb, const char *keystr);
 118
 119 /****************************************************************************
 120  Atomic integer change. Returns old value. To create, set initial value in *oldval.
 121 ****************************************************************************/
 122 int32_t tdb_change_int32_atomic(struct tdb_context *tdb, const char *keystr, int32_t *oldval, int32_t change_val);
 123
 124 /****************************************************************************
 125  Atomic unsigned integer change. Returns old value. To create, set initial value in *oldval.
 126 ****************************************************************************/
 127 bool tdb_change_uint32_atomic(struct tdb_context *tdb, const char *keystr, uint32_t *oldval, uint32_t change_val);
 128
 129 /****************************************************************************
 130  Allow tdb_delete to be used as a tdb_traversal_fn.
 131 ****************************************************************************/
 132 int tdb_traverse_delete_fn(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf,
 133                      void *state);
 134
 135 #endif /* _____LIB_UTIL_UTIL_TDB_H__ */
 136