mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-21 03:10:25 +08:00
137 lines
2.4 KiB
C
137 lines
2.4 KiB
C
/* nextid.c - keep track of the next id to be given out */
|
|
/* $OpenLDAP$ */
|
|
/*
|
|
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
|
|
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
|
|
*/
|
|
|
|
#include "portable.h"
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <ac/string.h>
|
|
#include <ac/socket.h>
|
|
#include <ac/param.h>
|
|
|
|
#include "slap.h"
|
|
#include "back-ldbm.h"
|
|
|
|
static int
|
|
next_id_read( Backend *be, ID *idp )
|
|
{
|
|
Datum key, data;
|
|
DBCache *db;
|
|
|
|
*idp = NOID;
|
|
|
|
if ( (db = ldbm_cache_open( be, "nextid", LDBM_SUFFIX, LDBM_WRCREAT ))
|
|
== NULL ) {
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG( BACK_LDBM, CRIT,
|
|
"next_id_read: could not open/create nextid%s\n", LDBM_SUFFIX, 0, 0 );
|
|
#else
|
|
Debug( LDAP_DEBUG_ANY, "Could not open/create nextid" LDBM_SUFFIX "\n",
|
|
0, 0, 0 );
|
|
#endif
|
|
|
|
return( -1 );
|
|
}
|
|
|
|
ldbm_datum_init( key );
|
|
key.dptr = (char *) idp;
|
|
key.dsize = sizeof(ID);
|
|
|
|
data = ldbm_cache_fetch( db, key );
|
|
|
|
if( data.dptr != NULL ) {
|
|
AC_MEMCPY( idp, data.dptr, sizeof( ID ) );
|
|
ldbm_datum_free( db->dbc_db, data );
|
|
|
|
} else {
|
|
*idp = 1;
|
|
}
|
|
|
|
ldbm_cache_close( be, db );
|
|
return( 0 );
|
|
}
|
|
|
|
int
|
|
next_id_write( Backend *be, ID id )
|
|
{
|
|
Datum key, data;
|
|
DBCache *db;
|
|
ID noid = NOID;
|
|
int flags, rc = 0;
|
|
|
|
if ( (db = ldbm_cache_open( be, "nextid", LDBM_SUFFIX, LDBM_WRCREAT ))
|
|
== NULL ) {
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG( BACK_LDBM, CRIT,
|
|
"next_id_write: Could not open/create nextid%s\n", LDBM_SUFFIX, 0, 0 );
|
|
#else
|
|
Debug( LDAP_DEBUG_ANY, "Could not open/create nextid" LDBM_SUFFIX "\n",
|
|
0, 0, 0 );
|
|
#endif
|
|
|
|
return( -1 );
|
|
}
|
|
|
|
ldbm_datum_init( key );
|
|
ldbm_datum_init( data );
|
|
|
|
key.dptr = (char *) &noid;
|
|
key.dsize = sizeof(ID);
|
|
|
|
data.dptr = (char *) &id;
|
|
data.dsize = sizeof(ID);
|
|
|
|
flags = LDBM_REPLACE;
|
|
if ( ldbm_cache_store( db, key, data, flags ) != 0 ) {
|
|
rc = -1;
|
|
}
|
|
|
|
ldbm_cache_close( be, db );
|
|
return( rc );
|
|
}
|
|
|
|
int
|
|
next_id_get( Backend *be, ID *idp )
|
|
{
|
|
struct ldbminfo *li = (struct ldbminfo *) be->be_private;
|
|
int rc = 0;
|
|
|
|
*idp = NOID;
|
|
|
|
if ( li->li_nextid == NOID ) {
|
|
if ( ( rc = next_id_read( be, idp ) ) ) {
|
|
return( rc );
|
|
}
|
|
li->li_nextid = *idp;
|
|
}
|
|
|
|
*idp = li->li_nextid;
|
|
|
|
return( rc );
|
|
}
|
|
|
|
int
|
|
next_id( Backend *be, ID *idp )
|
|
{
|
|
struct ldbminfo *li = (struct ldbminfo *) be->be_private;
|
|
int rc = 0;
|
|
|
|
if ( li->li_nextid == NOID ) {
|
|
if ( ( rc = next_id_read( be, idp ) ) ) {
|
|
return( rc );
|
|
}
|
|
li->li_nextid = *idp;
|
|
}
|
|
|
|
*idp = li->li_nextid++;
|
|
if ( next_id_write( be, li->li_nextid ) ) {
|
|
rc = -1;
|
|
}
|
|
|
|
return( rc );
|
|
}
|