1 /* nextid.c - keep track of the next id to be given out */
4 * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
12 #include <ac/string.h>
13 #include <ac/socket.h>
15 #ifdef HAVE_SYS_PARAM_H
16 #include <sys/param.h>
20 #include "back-ldbm.h"
23 next_id_read( Backend *be )
29 if ( (db = ldbm_cache_open( be, "nextid", LDBM_SUFFIX, LDBM_WRCREAT ))
31 Debug( LDAP_DEBUG_ANY, "Could not open/create nextid" LDBM_SUFFIX "\n",
36 ldbm_datum_init( key );
37 key.dptr = (char *) &id;
38 key.dsize = sizeof(ID);
40 data = ldbm_cache_fetch( db, key );
42 if( data.dptr != NULL ) {
43 memcpy( &id, data.dptr, sizeof( ID ) );
44 ldbm_datum_free( db->dbc_db, data );
50 ldbm_cache_close( be, db );
55 next_id_write( Backend *be, ID id )
57 struct ldbminfo *li = (struct ldbminfo *) be->be_private;
63 if ( (db = ldbm_cache_open( be, "nextid", LDBM_SUFFIX, LDBM_WRCREAT ))
65 Debug( LDAP_DEBUG_ANY, "Could not open/create nextid" LDBM_SUFFIX "\n",
70 ldbm_datum_init( key );
71 ldbm_datum_init( data );
73 key.dptr = (char *) &noid;
74 key.dsize = sizeof(ID);
76 data.dptr = (char *) &id;
77 data.dsize = sizeof(ID);
80 if ( ldbm_cache_store( db, key, data, flags ) != 0 ) {
84 ldbm_cache_close( be, db );
89 next_id_get( Backend *be )
91 struct ldbminfo *li = (struct ldbminfo *) be->be_private;
94 ldap_pvt_thread_mutex_lock( &li->li_nextid_mutex );
96 if ( li->li_nextid == NOID ) {
97 li->li_nextid = next_id_read( be );
102 ldap_pvt_thread_mutex_unlock( &li->li_nextid_mutex );
107 next_id( Backend *be )
109 struct ldbminfo *li = (struct ldbminfo *) be->be_private;
112 ldap_pvt_thread_mutex_lock( &li->li_nextid_mutex );
114 if ( li->li_nextid == NOID ) {
115 li->li_nextid = next_id_read( be );
118 if ( li->li_nextid != NOID ) {
119 id = li->li_nextid++;
121 (void) next_id_write( be, li->li_nextid );
124 ldap_pvt_thread_mutex_unlock( &li->li_nextid_mutex );