Use long-lived per-thread TXNs for loading entries from DB.

[openldap] / servers / slapd / back-bdb / back-bdb.h

diff --git a/servers/slapd/back-bdb/back-bdb.h b/servers/slapd/back-bdb/back-bdb.h
index a70cc05a4dc8844618ccbcd42b9c2ca798f4d0d2..3dcbc6de96f266f18ebfebb9183a390352419901 100644 (file)
--- a/servers/slapd/back-bdb/back-bdb.h
+++ b/servers/slapd/back-bdb/back-bdb.h
@@ -2,7 +2,7 @@
 /* $OpenLDAP$ */
 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
  *
- * Copyright 2000-2003 The OpenLDAP Foundation.
+ * Copyright 2000-2004 The OpenLDAP Foundation.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -73,10 +73,6 @@ LDAP_BEGIN_DECL
 /* The minimum we can function with */
 #define MINIMUM_SEARCH_STACK_DEPTH     8
 
-/* for the IDL cache */
-#define SLAP_IDL_CACHE 1
-
-#ifdef SLAP_IDL_CACHE
 typedef struct bdb_idl_cache_entry_s {
        struct berval kstr;
        ldap_pvt_thread_rdwr_t idl_entry_rwlock;
@@ -85,18 +81,24 @@ typedef struct bdb_idl_cache_entry_s {
        struct bdb_idl_cache_entry_s* idl_lru_prev;
        struct bdb_idl_cache_entry_s* idl_lru_next;
 } bdb_idl_cache_entry_t;
-#endif
 
 /* BDB backend specific entry info */
 typedef struct bdb_entry_info {
        struct bdb_entry_info *bei_parent;
        ID bei_id;
 
-       int bei_state;
+       /* we use the bei_id as a lockobj, but we need to make the size != 4
+        * to avoid conflicting with BDB's internal locks. So add a byte here
+        * that is always zero.
+        */
+       char bei_lockpad;
+                                               
+       short bei_state;
 #define        CACHE_ENTRY_DELETED     1
 #define        CACHE_ENTRY_NO_KIDS     2
 #define        CACHE_ENTRY_NOT_LINKED  4
 #define CACHE_ENTRY_NO_GRANDKIDS       8
+#define        CACHE_ENTRY_LOADING     0x10
 
        /*
         * remaining fields require backend cache lock to access
@@ -129,6 +131,7 @@ typedef struct bdb_cache {
        EntryInfo       *c_lrutail;     /* lru - rem lru entries from here */
        ldap_pvt_thread_rdwr_t c_rwlock;
        ldap_pvt_thread_mutex_t lru_mutex;
+       u_int32_t       c_locker;       /* used by lru cleaner */
 } Cache;
  
 #define CACHE_READ_LOCK                0
@@ -173,7 +176,6 @@ struct bdb_info {
        LDAP_LIST_HEAD(pl, slap_op) bi_psearch_list;
        ldap_pvt_thread_rdwr_t bi_pslist_rwlock;
        LDAP_LIST_HEAD(se, slap_session_entry) bi_session_list;
-#ifdef SLAP_IDL_CACHE
        int             bi_idl_cache_max_size;
        int             bi_idl_cache_size;
        Avlnode         *bi_idl_tree;
@@ -181,7 +183,6 @@ struct bdb_info {
        bdb_idl_cache_entry_t   *bi_idl_lru_tail;
        ldap_pvt_thread_rdwr_t bi_idl_tree_rwlock;
        ldap_pvt_thread_mutex_t bi_idl_tree_lrulock;
-#endif
 };
 
 #define bi_id2entry    bi_databases[BDB_ID2ENTRY]