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Berkeley DB: DBENV->set_lk_conflicts

DBENV->set_lk_conflicts

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#include <db.h>

int DBENV->set_lk_conflicts(DB_ENV *dbenv, u_int8_t *conflicts, int nmodes);

Description

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

conflicts[requested_mode][held_mode]

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

If no 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_locks, DBENV->set_lk_max_lockers, DBENV->set_lk_max_objects, DBENV->set_lk_max, lock_detect, lock_get, lock_id, lock_put, lock_stat and lock_vec.

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