/** @file midl.h
- * @brief mdb ID List header file.
+ * @brief LMDB ID List header file.
*
* This file was originally part of back-bdb but has been
* modified for use in libmdb. Most of the macros defined
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
- * Copyright 2000-2013 The OpenLDAP Foundation.
+ * Copyright 2000-2014 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
extern "C" {
#endif
-/** @defgroup internal MDB Internals
+/** @defgroup internal LMDB Internals
* @{
*/
/** @defgroup idls ID List Management
* @{
*/
- /** A generic ID number. These were entryIDs in back-bdb.
+ /** A generic unsigned ID number. These were entryIDs in back-bdb.
* Preferably it should have the same size as a pointer.
*/
typedef size_t MDB_ID;
/* IDL sizes - likely should be even bigger
* limiting factors: sizeof(ID), thread stack size
*/
+#ifdef VL32
+#define MDB_IDL_LOGN 10 /* DB_SIZE is 2^10, UM_SIZE is 2^11 */
+#else
#define MDB_IDL_LOGN 16 /* DB_SIZE is 2^16, UM_SIZE is 2^17 */
+#endif
#define MDB_IDL_DB_SIZE (1<<MDB_IDL_LOGN)
#define MDB_IDL_UM_SIZE (1<<(MDB_IDL_LOGN+1))
#define MDB_IDL_FIRST( ids ) ( (ids)[1] )
#define MDB_IDL_LAST( ids ) ( (ids)[(ids)[0]] )
-#if 0 /* superseded by append/sort */
- /** Insert an ID into an IDL.
- * @param[in,out] ids The IDL to insert into.
- * @param[in] id The ID to insert.
- * @return 0 on success, -1 if ID was already present, -2 on error.
+ /** Current max length of an #mdb_midl_alloc()ed IDL */
+#define MDB_IDL_ALLOCLEN( ids ) ( (ids)[-1] )
+
+ /** Append ID to IDL. The IDL must be big enough. */
+#define mdb_midl_xappend(idl, id) do { \
+ MDB_ID *xidl = (idl), xlen = ++(xidl[0]); \
+ xidl[xlen] = (id); \
+ } while (0)
+
+ /** Search for an ID in an IDL.
+ * @param[in] ids The IDL to search.
+ * @param[in] id The ID to search for.
+ * @return The index of the first ID greater than or equal to \b id.
*/
-int mdb_midl_insert( MDB_IDL ids, MDB_ID id );
-#endif
+unsigned mdb_midl_search( MDB_IDL ids, MDB_ID id );
/** Allocate an IDL.
* Allocates memory for an IDL of the given size.
*/
int mdb_midl_shrink(MDB_IDL *idp);
- /** Grow an IDL.
- * Add room for num additional elements.
- * @param[in,out] idp Address of the IDL to grow.
- * @param[in] num Number of elements to add.
- * @return 0 on success, -1 on failure.
+ /** Make room for num additional elements in an IDL.
+ * @param[in,out] idp Address of the IDL.
+ * @param[in] num Number of elements to make room for.
+ * @return 0 on success, ENOMEM on failure.
*/
-int mdb_midl_grow(MDB_IDL *idp, int num);
+int mdb_midl_need(MDB_IDL *idp, unsigned num);
/** Append an ID onto an IDL.
* @param[in,out] idp Address of the IDL to append to.
* @param[in] id The ID to append.
- * @return 0 on success, -1 if the IDL is too large.
+ * @return 0 on success, ENOMEM if the IDL is too large.
*/
int mdb_midl_append( MDB_IDL *idp, MDB_ID id );
/** Append an IDL onto an IDL.
* @param[in,out] idp Address of the IDL to append to.
* @param[in] app The IDL to append.
- * @return 0 on success, -1 if the IDL is too large.
+ * @return 0 on success, ENOMEM if the IDL is too large.
*/
int mdb_midl_append_list( MDB_IDL *idp, MDB_IDL app );
+ /** Append an ID range onto an IDL.
+ * @param[in,out] idp Address of the IDL to append to.
+ * @param[in] id The lowest ID to append.
+ * @param[in] n Number of IDs to append.
+ * @return 0 on success, ENOMEM if the IDL is too large.
+ */
+int mdb_midl_append_range( MDB_IDL *idp, MDB_ID id, unsigned n );
+
+ /** Merge an IDL onto an IDL. The destination IDL must be big enough.
+ * @param[in] idl The IDL to merge into.
+ * @param[in] merge The IDL to merge.
+ */
+void mdb_midl_xmerge( MDB_IDL idl, MDB_IDL merge );
+
/** Sort an IDL.
* @param[in,out] ids The IDL to sort.
*/