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Howard Chu 2016-02-15 00:08:25 +00:00
parent 2b5e155816
commit 31e4e8c3a3
2 changed files with 76 additions and 23 deletions
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19
external/db_drivers/liblmdb/lmdb.h vendored
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@ -78,6 +78,11 @@
* access to locks and lock file. Exceptions: On read-only filesystems
* or with the #MDB_NOLOCK flag described under #mdb_env_open().
*
* - An LMDB configuration will often reserve considerable \b unused
* memory address space and maybe file size for future growth.
* This does not use actual memory or disk space, but users may need
* to understand the difference so they won't be scared off.
*
* - By default, in versions before 0.9.10, unused portions of the data
* file might receive garbage data from memory freed by other code.
* (This does not happen when using the #MDB_WRITEMAP flag.) As of
@ -130,7 +135,7 @@
*
* @author Howard Chu, Symas Corporation.
*
* @copyright Copyright 2011-2015 Howard Chu, Symas Corp. All rights reserved.
* @copyright Copyright 2011-2016 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
@ -392,7 +397,9 @@ typedef enum MDB_cursor_op {
MDB_PREV_NODUP, /**< Position at last data item of previous key */
MDB_SET, /**< Position at specified key */
MDB_SET_KEY, /**< Position at specified key, return key + data */
MDB_SET_RANGE /**< Position at first key greater than or equal to specified key. */
MDB_SET_RANGE, /**< Position at first key greater than or equal to specified key. */
MDB_PREV_MULTIPLE /**< Position at previous page and return key and up to
a page of duplicate data items. Only for #MDB_DUPFIXED */
} MDB_cursor_op;
/** @defgroup errors Return Codes
@ -538,9 +545,11 @@ int mdb_env_create(MDB_env **env);
* allowed. LMDB will still modify the lock file - except on read-only
* filesystems, where LMDB does not use locks.
* <li>#MDB_WRITEMAP
* Use a writeable memory map unless MDB_RDONLY is set. This is faster
* and uses fewer mallocs, but loses protection from application bugs
* Use a writeable memory map unless MDB_RDONLY is set. This uses
* fewer mallocs but loses protection from application bugs
* like wild pointer writes and other bad updates into the database.
* This may be slightly faster for DBs that fit entirely in RAM, but
* is slower for DBs larger than RAM.
* Incompatible with nested transactions.
* Do not mix processes with and without MDB_WRITEMAP on the same
* environment. This can defeat durability (#mdb_env_sync etc).
@ -1535,7 +1544,7 @@ int mdb_cursor_del(MDB_cursor *cursor, unsigned int flags);
* <li>EINVAL - cursor is not initialized, or an invalid parameter was specified.
* </ul>
*/
int mdb_cursor_count(MDB_cursor *cursor, size_t *countp);
int mdb_cursor_count(MDB_cursor *cursor, mdb_size_t *countp);
/** @brief Compare two data items according to a particular database.
*