1 /* back-ldbm.h - ldap ldbm back-end header file */
4 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
15 #define DEFAULT_CACHE_SIZE 1000
17 #if defined(HAVE_BERKELEY_DB) && DB_VERSION_MAJOR >= 2
18 # define DEFAULT_DBCACHE_SIZE (100 * DEFAULT_DB_PAGE_SIZE)
20 # define DEFAULT_DBCACHE_SIZE 100000
23 #define DEFAULT_DB_DIRECTORY LDAP_RUNDIR LDAP_DIRSEP "openldap-ldbm"
24 #define DEFAULT_MODE 0600
26 #define DN_BASE_PREFIX SLAP_INDEX_EQUALITY_PREFIX
27 #define DN_ONE_PREFIX '%'
28 #define DN_SUBTREE_PREFIX '@'
31 * there is a single index for each attribute. these prefixes ensure
32 * that there is no collision among keys.
35 /* allow PREFIX + byte for continuate number */
36 #define SLAP_INDEX_CONT_SIZE ( sizeof(SLAP_INDEX_CONT_PREFIX) + sizeof(unsigned char) )
38 #define DEFAULT_BLOCKSIZE 8192
41 * This structure represents an id block on disk and an id list
44 * The fields have the following meanings:
46 * b_nmax maximum number of ids in this block. if this is == ALLIDSBLOCK,
47 * then this block represents all ids.
48 * b_nids current number of ids in use in this block. if this
49 * is == INDBLOCK, then this block is an indirect block
50 * containing a list of other blocks containing actual ids.
51 * the list is terminated by an id of NOID.
52 * b_ids a list of the actual ids themselves
57 #define ID_BLOCK_NMAX_OFFSET 0
58 #define ID_BLOCK_NIDS_OFFSET 1
59 #define ID_BLOCK_IDS_OFFSET 2
61 /* all ID_BLOCK macros operate on a pointer to a ID_BLOCK */
63 #define ID_BLOCK_NMAX(b) ((b)[ID_BLOCK_NMAX_OFFSET])
64 #define ID_BLOCK_NIDS(b) ((b)[ID_BLOCK_NIDS_OFFSET])
65 #define ID_BLOCK_ID(b, n) ((b)[ID_BLOCK_IDS_OFFSET+(n)])
67 #define ID_BLOCK_NOID(b, n) (ID_BLOCK_ID((b),(n)) == NOID)
69 #define ID_BLOCK_ALLIDS_VALUE 0
70 #define ID_BLOCK_ALLIDS(b) (ID_BLOCK_NMAX(b) == ID_BLOCK_ALLIDS_VALUE)
72 #define ID_BLOCK_INDIRECT_VALUE 0
73 #define ID_BLOCK_INDIRECT(b) (ID_BLOCK_NIDS(b) == ID_BLOCK_INDIRECT_VALUE)
75 /* for the in-core cache of entries */
76 typedef struct ldbm_cache {
81 Entry *c_lruhead; /* lru - add accessed entries here */
82 Entry *c_lrutail; /* lru - rem lru entries from here */
83 ldap_pvt_thread_mutex_t c_mutex;
86 #define CACHE_READ_LOCK 0
87 #define CACHE_WRITE_LOCK 1
89 /* for the cache of open index files */
90 typedef struct ldbm_dbcache {
102 #define MAXDBCACHE 128
106 ldap_pvt_thread_mutex_t li_nextid_mutex;
107 ldap_pvt_thread_mutex_t li_root_mutex;
108 ldap_pvt_thread_mutex_t li_add_mutex;
110 slap_index li_defaultmask;
114 int li_dblocking; /* lock databases */
115 int li_dbwritesync; /* write sync */
117 DBCache li_dbcache[MAXDBCACHE];
118 ldap_pvt_thread_mutex_t li_dbcache_mutex;
119 ldap_pvt_thread_cond_t li_dbcache_cv;
124 #include "proto-back-ldbm.h"
126 #endif /* _back_ldbm_h_ */