DbEnv::lock_id_free()
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## DbEnv::lock_id_free()

    #include <db_cxx.h>

    int
    DbEnv::lock_id_free(u_int32_t id);

The `DbEnv::lock_id_free()` method frees a locker ID allocated by the DbEnv::lock_id() method.

The `DbEnv::lock_id_free()` method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

### Parameters

#### id

The id parameter is the locker id to be freed.

### Errors

The `DbEnv::lock_id_free()` method may fail and throw a DbException exception, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

#### EINVAL

If the locker ID is invalid or locks are still held by this locker ID; or if an invalid flag value or parameter was specified.

### Class

DbEnv, DbLock

### See Also

Locking Subsystem and Related Methods

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