2 * @brief ldap bdb back-end ID List header file.
4 * This file was originally part of back-bdb but has been
5 * modified for use in libmdb. Most of the macros defined
6 * in this file are unused, just left over from the original.
8 * This file is only used internally in libmdb and its definitions
9 * are not exposed publicly.
12 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
14 * Copyright 2000-2011 The OpenLDAP Foundation.
15 * All rights reserved.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted only as authorized by the OpenLDAP
21 * A copy of this license is available in the file LICENSE in the
22 * top-level directory of the distribution or, alternatively, at
23 * <http://www.OpenLDAP.org/license.html>.
29 /** @defgroup internal MDB Internals
32 /** @defgroup idls ID List Management
35 /** An ID should be the largest integer type supported on a machine.
37 #define ID unsigned long
39 /** An IDL is an ID List, a sorted array of IDs. The first
40 * element of the array is a counter for how many actual
41 * IDs are in the list. In the original back-bdb code, IDLs are
42 * sorted in ascending order. For libmdb IDLs are sorted in
49 /* IDL sizes - likely should be even bigger
50 * limiting factors: sizeof(ID), thread stack size
52 #define MDB_IDL_LOGN 16 /* DB_SIZE is 2^16, UM_SIZE is 2^17 */
53 #define MDB_IDL_DB_SIZE (1<<MDB_IDL_LOGN)
54 #define MDB_IDL_UM_SIZE (1<<(MDB_IDL_LOGN+1))
55 #define MDB_IDL_UM_SIZEOF (MDB_IDL_UM_SIZE * sizeof(ID))
57 #define MDB_IDL_DB_MAX (MDB_IDL_DB_SIZE-1)
59 #define MDB_IDL_UM_MAX (MDB_IDL_UM_SIZE-1)
61 #define MDB_IDL_IS_RANGE(ids) ((ids)[0] == NOID)
62 #define MDB_IDL_RANGE_SIZE (3)
63 #define MDB_IDL_RANGE_SIZEOF (MDB_IDL_RANGE_SIZE * sizeof(ID))
64 #define MDB_IDL_SIZEOF(ids) ((MDB_IDL_IS_RANGE(ids) \
65 ? MDB_IDL_RANGE_SIZE : ((ids)[0]+1)) * sizeof(ID))
67 #define MDB_IDL_RANGE_FIRST(ids) ((ids)[1])
68 #define MDB_IDL_RANGE_LAST(ids) ((ids)[2])
70 #define MDB_IDL_RANGE( ids, f, l ) \
77 #define MDB_IDL_ZERO(ids) \
84 #define MDB_IDL_IS_ZERO(ids) ( (ids)[0] == 0 )
85 #define MDB_IDL_IS_ALL( range, ids ) ( (ids)[0] == NOID \
86 && (ids)[1] <= (range)[1] && (range)[2] <= (ids)[2] )
88 #define MDB_IDL_CPY( dst, src ) (memcpy( dst, src, MDB_IDL_SIZEOF( src ) ))
90 #define MDB_IDL_ID( bdb, ids, id ) MDB_IDL_RANGE( ids, id, ((bdb)->bi_lastid) )
91 #define MDB_IDL_ALL( bdb, ids ) MDB_IDL_RANGE( ids, 1, ((bdb)->bi_lastid) )
93 #define MDB_IDL_FIRST( ids ) ( (ids)[1] )
94 #define MDB_IDL_LAST( ids ) ( MDB_IDL_IS_RANGE(ids) \
95 ? (ids)[2] : (ids)[(ids)[0]] )
97 #define MDB_IDL_N( ids ) ( MDB_IDL_IS_RANGE(ids) \
98 ? ((ids)[2]-(ids)[1])+1 : (ids)[0] )
100 /** Insert an ID into an IDL.
101 * @param[in,out] ids The IDL to insert into.
102 * @param[in] id The ID to insert.
103 * @return 0 on success, -1 if the ID was already present in the IDL.
105 int mdb_midl_insert( IDL ids, ID id );
107 /** An ID2 is an ID/pointer pair.
110 ID mid; /**< The ID */
111 void *mptr; /**< The pointer */
114 /** An ID2L is an ID2 List, a sorted array of ID2s.
115 * The first element's \b mid member is a count of how many actual
116 * elements are in the array. The \b mptr member of the first element is unused.
117 * The array is sorted in ascending order by \b mid.
121 /** Search for an ID in an ID2L.
122 * @param[in] ids The ID2L to search.
123 * @param[in] id The ID to search for.
124 * @return The index of the first ID2 whose \b mid member is greater than or equal to \b id.
126 unsigned mdb_mid2l_search( ID2L ids, ID id );
129 /** Insert an ID2 into a ID2L.
130 * @param[in,out] ids The ID2L to insert into.
131 * @param[in] id The ID2 to insert.
132 * @return 0 on success, -1 if the ID was already present in the MIDL2.
134 int mdb_mid2l_insert( ID2L ids, ID2 *id );
138 #endif /* _MDB_MIDL_H_ */