Add start of discussion of strings in LDAP/X.500 and OpenLDAP.

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

diff --git a/servers/slapd/back-bdb/idl.h b/servers/slapd/back-bdb/idl.h
index d91296aa6c576d130df5bdece3a7c1f4a30f7fcd..bf302679b4b06e22da915fdf8b9f90f92c5185a1 100644 (file)
--- a/servers/slapd/back-bdb/idl.h
+++ b/servers/slapd/back-bdb/idl.h
@@ -1,7 +1,7 @@
 /* back-bdb.h - ldap ldbm back-end header file */
 /* $OpenLDAP$ */
 /*
- * Copyright 2000 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 2000-2002 The OpenLDAP Foundation, All Rights Reserved.
  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
  */
 
@@ -14,15 +14,21 @@
 
 /* IDL sizes - likely should be even bigger
  *   limiting factors: sizeof(ID), thread stack size
+ *
+ * Note: the -2 stuff is intended to reduce the size
+ * just enough to avoiding internal (to malloc) allocation
+ * of overly large blocks to provide the requested size. 
+ * The stuff needs to be thought out better, doesn't deal
+ * well with mixed stack/malloc allocation of IDLs.
  */
-#define BDB_IDL_DB_SIZE                (1<<16) /* 32K IDL on disk */
-#define BDB_IDL_UM_SIZE                (1<<17) /* 64K IDL in memory */
+#define BDB_IDL_DB_SIZE                ((1<<16)-2) /* 32K IDL on disk */
+#define BDB_IDL_UM_SIZE                ((1<<17)-2) /* 64K IDL in memory */
 #define BDB_IDL_UM_SIZEOF      (BDB_IDL_UM_SIZE * sizeof(ID))
 
-#define BDB_IDL_DB_MAX         (BDB_IDL_DB_SIZE-32)
+#define BDB_IDL_DB_MAX         (BDB_IDL_DB_SIZE-2)
 /* #define BDB_IDL_DB_ALLOC    (BDB_IDL_DB_SIZE * sizeof(ID)) */
 
-#define BDB_IDL_UM_MAX                 (BDB_IDL_UM_SIZE-32)
+#define BDB_IDL_UM_MAX                 (BDB_IDL_UM_SIZE-2)
 /* #define BDB_IDL_UM_ALLOC    (BDB_IDL_UM_SIZE * sizeof(ID)) */
 
 #define BDB_IDL_IS_RANGE(ids)  ((ids)[0] == NOID)