Berkeley DB: DBENV->set_lk_conflicts
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++

# DBENV->set_lk_conflicts |

`

###

    #include <db.h>

    int
    DBENV->set_lk_conflicts(DB_ENV *dbenv,
        u_int8_t *lk_conflicts, int lk_nmodes);

# Description

Set the locking conflicts matrix. The lk_conflicts argument is an lk_nmodes by lk_nmodes array. A non-0 value for the array element:

>     lk_conflicts[requested_mode][held_mode]

indicates that requested_mode and held_mode conflict. The not-granted mode must be represented by 0.

If no lk_conflicts value is specified, the conflicts array db_rw_conflicts is used; see Standard Lock Modes for a description of that array.

The DBENV->set_lk_conflicts interface may only be used to configure Berkeley DB before the DBENV->open interface is called.

The DBENV->set_lk_conflicts function returns a non-zero error value on failure and 0 on success.

# Errors

EINVAL
  An invalid flag value or parameter was specified.

  Called after DBENV->open was called.

ENOMEM
  No memory was available to copy the conflicts array.

# See Also

DBENV->set_lk_conflicts, DBENV->set_lk_detect, DBENV->set_lk_max, lock_detect, lock_get, lock_id, lock_put, lock_stat and lock_vec.`

Copyright Sleepycat Software