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https://git.openldap.org/openldap/openldap.git
synced 2024-12-21 03:10:25 +08:00
35655c056f
Old code applied sync flags to store(), however supported DBMs require such flags to be specified during open(). The new code now applies flags in ldbm_cache_open (which calls ldbm_open). ldbm_cache_close() now calls ldbm_sync(). This will force a updating of on-disk contents after each LDAP operation. The old code either failed to sync the on-disk contents until close or synced on every store. Per LDBM operation syncing *should* be safe enough... real data safety requires transactions. Removed nosync option from BDB2 as it is not compatible with txn support. Also added code to disable DBM level locking as slapd is only process acessing the databases (dbnolocking).
128 lines
2.3 KiB
C
128 lines
2.3 KiB
C
/* nextid.c - keep track of the next id to be given out */
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/* $OpenLDAP$ */
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/*
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* Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/socket.h>
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#include "slap.h"
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#include "back-ldbm.h"
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static ID
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next_id_read( Backend *be )
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{
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ID id = NOID;
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Datum key, data;
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DBCache *db;
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if ( (db = ldbm_cache_open( be, "nextid", LDBM_SUFFIX, LDBM_WRCREAT ))
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== NULL ) {
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Debug( LDAP_DEBUG_ANY, "Could not open/create nextid" LDBM_SUFFIX "\n",
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0, 0, 0 );
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return( NOID );
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}
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ldbm_datum_init( key );
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key.dptr = (char *) &id;
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key.dsize = sizeof(ID);
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data = ldbm_cache_fetch( db, key );
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if( data.dptr != NULL ) {
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memcpy( &id, data.dptr, sizeof( ID ) );
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ldbm_datum_free( db->dbc_db, data );
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} else {
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id = 1;
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}
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ldbm_cache_close( be, db );
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return id;
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}
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ID
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next_id_write( Backend *be, ID id )
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{
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struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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Datum key, data;
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DBCache *db;
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ID noid = NOID;
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int flags;
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if ( (db = ldbm_cache_open( be, "nextid", LDBM_SUFFIX, LDBM_WRCREAT ))
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== NULL ) {
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Debug( LDAP_DEBUG_ANY, "Could not open/create nextid" LDBM_SUFFIX "\n",
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0, 0, 0 );
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return( NOID );
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}
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ldbm_datum_init( key );
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ldbm_datum_init( data );
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key.dptr = (char *) &noid;
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key.dsize = sizeof(ID);
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data.dptr = (char *) &id;
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data.dsize = sizeof(ID);
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flags = LDBM_REPLACE;
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if ( ldbm_cache_store( db, key, data, flags ) != 0 ) {
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id = NOID;
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}
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ldbm_cache_close( be, db );
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return id;
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}
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ID
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next_id_get( Backend *be )
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{
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struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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ID id = NOID;
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ldap_pvt_thread_mutex_lock( &li->li_nextid_mutex );
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if ( li->li_nextid == NOID ) {
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li->li_nextid = next_id_read( be );
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}
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id = li->li_nextid;
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ldap_pvt_thread_mutex_unlock( &li->li_nextid_mutex );
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return id;
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}
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ID
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next_id( Backend *be )
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{
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struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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ID id = NOID;
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ldap_pvt_thread_mutex_lock( &li->li_nextid_mutex );
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if ( li->li_nextid == NOID ) {
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li->li_nextid = next_id_read( be );
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}
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if ( li->li_nextid != NOID ) {
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id = li->li_nextid++;
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(void) next_id_write( be, li->li_nextid );
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}
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ldap_pvt_thread_mutex_unlock( &li->li_nextid_mutex );
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return id;
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}
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