+/* mdb.h - memory-mapped database library header file */
+/*
+ * Copyright 2011 Howard Chu, Symas Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ *
+ * This code is derived from btree.c written by Martin Hedenfalk.
+ *
+ * Copyright (c) 2009, 2010 Martin Hedenfalk <martin@bzero.se>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
#ifndef _MDB_H_
#define _MDB_H_
struct MDB_cursor;
struct MDB_txn;
-struct MDB_db;
struct MDB_env;
typedef struct MDB_cursor MDB_cursor;
typedef struct MDB_txn MDB_txn;
-typedef struct MDB_db MDB_db;
typedef struct MDB_env MDB_env;
+typedef unsigned int MDB_dbi;
+
typedef struct MDB_val {
void *mv_data;
size_t mv_size;
typedef int (MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
typedef void (MDB_rel_func)(void *ptr, void *oldptr);
-#define MDB_NOOVERWRITE 1
+#define MDB_NOOVERWRITE 0x10
+#define MDB_NODUPDATA 0x20
+#define MDB_DEL_DUP 0x40
typedef enum MDB_cursor_op { /* cursor operations */
- MDB_CURSOR, /* position at given key */
- MDB_CURSOR_EXACT, /* position at key, or fail */
MDB_FIRST,
+ MDB_GET_BOTH, /* position at key/data */
+ MDB_GET_BOTH_RANGE, /* position at key, nearest data */
+ MDB_LAST,
MDB_NEXT,
- MDB_LAST, /* not implemented */
- MDB_PREV /* not implemented */
+ MDB_NEXT_DUP,
+ MDB_NEXT_NODUP,
+ MDB_PREV,
+ MDB_PREV_DUP,
+ MDB_PREV_NODUP,
+ MDB_SET, /* position at key, or fail */
+ MDB_SET_RANGE /* position at given key */
} MDB_cursor_op;
/* return codes */
-#define MDB_FAIL -1
#define MDB_SUCCESS 0
+#define MDB_FAIL -1
+#define MDB_KEYEXIST -2
+#define MDB_NOTFOUND -3
+#define MDB_VERSION_MISMATCH -4
/* DB flags */
#define MDB_REVERSEKEY 0x02 /* use reverse string keys */
-#define MDB_NOSYNC 0x10000 /* don't fsync after commit */
-#define MDB_RDONLY 0x20000 /* read only */
+#define MDB_DUPSORT 0x04 /* use sorted duplicates */
/* environment flags */
#define MDB_FIXEDMAP 0x01 /* mmap at a fixed address */
+#define MDB_NOSYNC 0x10000 /* don't fsync after commit */
+#define MDB_RDONLY 0x20000 /* read only */
+
+/* DB or env flags */
+#define MDB_CREATE 0x40000 /* create if not present */
typedef struct MDB_stat {
- time_t ms_created_at;
unsigned int ms_psize;
unsigned int ms_depth;
unsigned long ms_branch_pages;
unsigned long ms_leaf_pages;
unsigned long ms_overflow_pages;
- unsigned long ms_revisions;
unsigned long ms_entries;
} MDB_stat;
-int mdbenv_create(MDB_env **env, size_t size);
+int mdbenv_create(MDB_env **env);
int mdbenv_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode);
-int mdbenv_stat(MDB_env *env, MDB_stat **stat);
+int mdbenv_stat(MDB_env *env, MDB_stat *stat);
+int mdbenv_sync(MDB_env *env);
void mdbenv_close(MDB_env *env);
int mdbenv_get_flags(MDB_env *env, unsigned int *flags);
int mdbenv_get_path(MDB_env *env, const char **path);
-int mdbenv_sync(MDB_env *env);
-int mdbenv_compact(MDB_env *env);
+int mdbenv_set_mapsize(MDB_env *env, size_t size);
+int mdbenv_set_maxreaders(MDB_env *env, int readers);
+int mdbenv_get_maxreaders(MDB_env *env, int *readers);
+int mdbenv_set_maxdbs(MDB_env *env, int dbs);
int mdb_txn_begin(MDB_env *env, int rdonly, MDB_txn **txn);
int mdb_txn_commit(MDB_txn *txn);
void mdb_txn_abort(MDB_txn *txn);
-int mdb_open(MDB_env *env, MDB_txn *txn, const char *name, unsigned int flags, MDB_db **db);
-int mdb_stat(MDB_db *db, MDB_stat **stat);
-void mdb_close(MDB_db *db);
+int mdb_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi);
+int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat);
+void mdb_close(MDB_txn *txn, MDB_dbi dbi);
-int mdb_get(MDB_db *db, MDB_txn *txn, MDB_val *key, MDB_val *data);
-int mdb_put(MDB_db *db, MDB_txn *txn, MDB_val *key, MDB_val *data,
+int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
+int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
+int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel);
+
+int mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
+int mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
+ unsigned int flags);
+int mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
unsigned int flags);
-int mdb_del(MDB_db *db, MDB_txn *txn, MDB_val *key, MDB_val *data);
-int mdb_cursor_open(MDB_db *db, MDB_txn *txn, MDB_cursor **cursor);
+int mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **cursor);
void mdb_cursor_close(MDB_cursor *cursor);
int mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
MDB_cursor_op op);
+int mdb_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
+ MDB_cursor_op op);
+int mdb_cursor_del(MDB_cursor *cursor, unsigned int flags);
-int mdb_cmp(MDB_db *db, const MDB_val *a, const MDB_val *b);
+int mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b);
#endif /* _MDB_H_ */
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