# DB_ENV->lock_id

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    #include <db.h>

    int
    DB_ENV->lock_id(DB_ENV *env, u_int32_t *idp);

# Description

The DB_ENV->lock_id function copies a locker ID, which is guaranteed to be unique in the specified lock table, into the memory location to which idp refers.

The DB_ENV->lock_id_free function should be called to return the locker ID to the Berkeley DB library when it is no longer needed.

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

# Errors

The DB_ENV->lock_id function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->lock_id function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

# See Also

DB_ENV->set_lk_conflicts, DB_ENV->set_lk_detect, DB_ENV->set_lk_max_lockers, DB_ENV->set_lk_max_locks, DB_ENV->set_lk_max_objects, DB_ENV->lock_detect, DB_ENV->lock_get, DB_ENV->lock_id, DB_ENV->lock_id_free, DB_ENV->lock_put, DB_ENV->lock_stat, and DB_ENV->lock_vec.`

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