From 104f8cc409822fcdf5aa98ae14f738d869e00eb5 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Thu, 19 Sep 2002 06:34:53 +0000
Subject: [PATCH] Simpler fix for NO_THREADS

---
 servers/slapd/back-bdb/back-bdb.h  |  8 +-------
 servers/slapd/back-bdb/cache.c     | 29 ++++++++++++-----------------
 servers/slapd/back-bdb/init.c      |  7 -------
 servers/slapd/back-bdb/proto-bdb.h |  2 +-
 4 files changed, 14 insertions(+), 32 deletions(-)

diff --git a/servers/slapd/back-bdb/back-bdb.h b/servers/slapd/back-bdb/back-bdb.h
index 70e40712d8..56b4150330 100644
--- a/servers/slapd/back-bdb/back-bdb.h
+++ b/servers/slapd/back-bdb/back-bdb.h
@@ -111,9 +111,6 @@ struct bdb_info {
 	u_int32_t	bi_txn_cp_kbyte;
 
 	int			bi_lock_detect;
-#ifdef NO_THREADS
-	int		bi_locker_id;
-#endif
 
 	ID			bi_lastid;
 	ldap_pvt_thread_mutex_t	bi_lastid_mutex;
@@ -170,11 +167,8 @@ struct bdb_op_info {
 #define BDB_REUSE_LOCKERS
 
 #ifdef BDB_REUSE_LOCKERS
-/* Hack - we depend on "op" and "bdb" being the right variable names
- * in each invoker.
- */
 #define	LOCK_ID_FREE(env, locker)
-#define	LOCK_ID(env, locker)	bdb_locker_id(op, bdb, locker)
+#define	LOCK_ID(env, locker)	bdb_locker_id(op, env, locker)
 #else
 #define	LOCK_ID_FREE(env, locker)	XLOCK_ID_FREE(env, locker)
 #define	LOCK_ID(env, locker)		XLOCK_ID(env, locker)
diff --git a/servers/slapd/back-bdb/cache.c b/servers/slapd/back-bdb/cache.c
index 8baf1e710b..a2e43e0db9 100644
--- a/servers/slapd/back-bdb/cache.c
+++ b/servers/slapd/back-bdb/cache.c
@@ -136,6 +136,9 @@ int
 bdb_cache_entry_db_lock
 ( DB_ENV *env, u_int32_t locker, Entry *e, int rw, u_int32_t flags, DB_LOCK *lock )
 {
+#ifdef NO_THREADS
+	return 0;
+#else
 	int       rc;
 	DBT       lockobj;
 	int       db_rw;
@@ -161,16 +164,21 @@ bdb_cache_entry_db_lock
 #endif
 	}
 	return rc;
+#endif /* NO_THREADS */
 }
 
 int
 bdb_cache_entry_db_unlock
 ( DB_ENV *env, DB_LOCK *lock )
 {
+#ifdef NO_THREADS
+	return 0;
+#else
 	int rc;
 
 	rc = LOCK_PUT ( env, lock );
 	return rc;
+#endif
 }
 
 /*
@@ -1123,29 +1131,17 @@ bdb_locker_id_free( void *key, void *data )
 }
 
 int
-bdb_locker_id( Operation *op, struct bdb_info *bdb, int *locker )
+bdb_locker_id( Operation *op, DB_ENV *env, int *locker )
 {
 	int i, rc, lockid;
 	void *data;
-	DB_ENV *env;
-
-	if ( !bdb || !op || !locker ) return -1;
 
-	env = bdb->bi_dbenv;
-	if ( !env ) return -1;
+	if ( !env || !op || !locker ) return -1;
 
-#ifdef NO_THREADS
-	if ( !bdb->bi_locker_id ) {
-		rc = XLOCK_ID( env, &bdb->bi_locker_id );
-		if (rc != 0) return rc;
-	}
-	*locker = bdb->bi_locker_id;
-	return 0;
-#else
-	/* Shouldn't happen */
+	/* Shouldn't happen unless we're single-threaded */
 	if ( !op->o_threadctx ) {
 		*locker = 0;
-		return -1;
+		return 0;
 	}
 
 	if ( ldap_pvt_thread_pool_getkey( op->o_threadctx, env, &data, NULL ) ) {
@@ -1175,6 +1171,5 @@ bdb_locker_id( Operation *op, struct bdb_info *bdb, int *locker )
 	}
 	*locker = lockid;
 	return 0;
-#endif /* NO_THREADS */
 }
 #endif
diff --git a/servers/slapd/back-bdb/init.c b/servers/slapd/back-bdb/init.c
index d8a9e683d2..7bd08c6726 100644
--- a/servers/slapd/back-bdb/init.c
+++ b/servers/slapd/back-bdb/init.c
@@ -178,9 +178,7 @@ bdb_db_open( BackendDB *be )
 
 	bdb->bi_dbenv->set_errpfx( bdb->bi_dbenv, be->be_suffix[0].bv_val );
 	bdb->bi_dbenv->set_errcall( bdb->bi_dbenv, bdb_errcall );
-#ifndef NO_THREADS
 	bdb->bi_dbenv->set_lk_detect( bdb->bi_dbenv, bdb->bi_lock_detect );
-#endif
 
 #ifdef BDB_SUBDIRS
 	{
@@ -414,11 +412,6 @@ bdb_db_close( BackendDB *be )
 
 	bdb_cache_release_all (&bdb->bi_cache);
 
-#if defined(NO_THREADS) && defined(BDB_REUSE_LOCKERS)
-	if ( bdb->bi_locker_id ) {
-		bdb_locker_id_free( bdb->bi_dbenv, bdb->bi_locker_id );
-	}
-#endif
 	return 0;
 }
 
diff --git a/servers/slapd/back-bdb/proto-bdb.h b/servers/slapd/back-bdb/proto-bdb.h
index 262c5a8137..6c7dfeb586 100644
--- a/servers/slapd/back-bdb/proto-bdb.h
+++ b/servers/slapd/back-bdb/proto-bdb.h
@@ -366,7 +366,7 @@ void bdb_cache_release_all( Cache *cache );
 
 #ifdef BDB_REUSE_LOCKERS
 
-int bdb_locker_id( Operation *op, struct bdb_info *bdb, int *locker );
+int bdb_locker_id( Operation *op, DB_ENV *env, int *locker );
 
 #endif
 
-- 
2.39.5