/** @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 2000-2012 The OpenLDAP Foundation.
+ * Copyright 2000-2016 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#ifndef _MDB_MIDL_H_
#define _MDB_MIDL_H_
-#include <stddef.h>
+#include "lmdb.h"
#ifdef __cplusplus
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;
+typedef mdb_size_t MDB_ID;
/** An IDL is an ID List, a sorted array of IDs. The first
* element of the array is a counter for how many actual
*/
typedef MDB_ID *MDB_IDL;
-#define MDB_NOID (~(MDB_ID)0)
-
/* IDL sizes - likely should be even bigger
* limiting factors: sizeof(ID), thread stack size
*/
+#ifdef MDB_VL32
+#define MDB_IDL_LOGN 14 /* DB_SIZE is 2^14, UM_SIZE is 2^15 */
+#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_UM_SIZEOF (MDB_IDL_UM_SIZE * sizeof(MDB_ID))
#define MDB_IDL_DB_MAX (MDB_IDL_DB_SIZE-1)
-
#define MDB_IDL_UM_MAX (MDB_IDL_UM_SIZE-1)
-#define MDB_IDL_IS_RANGE(ids) ((ids)[0] == MDB_NOID)
-#define MDB_IDL_RANGE_SIZE (3)
-#define MDB_IDL_RANGE_SIZEOF (MDB_IDL_RANGE_SIZE * sizeof(MDB_ID))
-#define MDB_IDL_SIZEOF(ids) ((MDB_IDL_IS_RANGE(ids) \
- ? MDB_IDL_RANGE_SIZE : ((ids)[0]+1)) * sizeof(MDB_ID))
-
-#define MDB_IDL_RANGE_FIRST(ids) ((ids)[1])
-#define MDB_IDL_RANGE_LAST(ids) ((ids)[2])
-
-#define MDB_IDL_RANGE( ids, f, l ) \
- do { \
- (ids)[0] = MDB_NOID; \
- (ids)[1] = (f); \
- (ids)[2] = (l); \
- } while(0)
-
-#define MDB_IDL_ZERO(ids) \
- do { \
- (ids)[0] = 0; \
- (ids)[1] = 0; \
- (ids)[2] = 0; \
- } while(0)
-
+#define MDB_IDL_SIZEOF(ids) (((ids)[0]+1) * sizeof(MDB_ID))
#define MDB_IDL_IS_ZERO(ids) ( (ids)[0] == 0 )
-#define MDB_IDL_IS_ALL( range, ids ) ( (ids)[0] == MDB_NOID \
- && (ids)[1] <= (range)[1] && (range)[2] <= (ids)[2] )
-
#define MDB_IDL_CPY( dst, src ) (memcpy( dst, src, MDB_IDL_SIZEOF( src ) ))
-
-#define MDB_IDL_ID( bdb, ids, id ) MDB_IDL_RANGE( ids, id, ((bdb)->bi_lastid) )
-#define MDB_IDL_ALL( bdb, ids ) MDB_IDL_RANGE( ids, 1, ((bdb)->bi_lastid) )
-
#define MDB_IDL_FIRST( ids ) ( (ids)[1] )
-#define MDB_IDL_LAST( ids ) ( MDB_IDL_IS_RANGE(ids) \
- ? (ids)[2] : (ids)[(ids)[0]] )
+#define MDB_IDL_LAST( ids ) ( (ids)[(ids)[0]] )
+
+ /** Current max length of an #mdb_midl_alloc()ed IDL */
+#define MDB_IDL_ALLOCLEN( ids ) ( (ids)[-1] )
-#define MDB_IDL_N( ids ) ( MDB_IDL_IS_RANGE(ids) \
- ? ((ids)[2]-(ids)[1])+1 : (ids)[0] )
+ /** 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)
-#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 the ID was already present in the IDL.
+ /** 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 a default size.
+ * Allocates memory for an IDL of the given size.
* @return IDL on success, NULL on failure.
*/
-MDB_IDL mdb_midl_alloc();
+MDB_IDL mdb_midl_alloc(int num);
/** Free an IDL.
* @param[in] ids The IDL to free.
/** Shrink an IDL.
* Return the IDL to the default size if it has grown larger.
* @param[in,out] idp Address of the IDL to shrink.
- * @return 0 on no change, non-zero if shrunk.
*/
-int mdb_midl_shrink(MDB_IDL *idp);
+void mdb_midl_shrink(MDB_IDL *idp);
+
+ /** 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_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.
*/
*/
int mdb_mid2l_append( MDB_ID2L ids, MDB_ID2 *id );
+#ifdef MDB_VL32
+typedef struct MDB_ID3 {
+ MDB_ID mid; /**< The ID */
+ void *mptr; /**< The pointer */
+ unsigned int mcnt; /**< Number of pages */
+ unsigned int mref; /**< Refcounter */
+} MDB_ID3;
+
+typedef MDB_ID3 *MDB_ID3L;
+
+unsigned mdb_mid3l_search( MDB_ID3L ids, MDB_ID id );
+int mdb_mid3l_insert( MDB_ID3L ids, MDB_ID3 *id );
+
+#endif /* MDB_VL32 */
/** @} */
/** @} */
#ifdef __cplusplus