#include <db.h> int DB_ENV->mutex_free(DB_ENV *dbenv, db_mutex_t mutex);
The DB_ENV->mutex_free() method discards a mutex allocated by
DB_ENV->mutex_alloc().
The DB_ENV->mutex_free() method may not be called before the
DB_ENV->open() method is called.
The DB_ENV->mutex_free()
method returns a non-zero error value on failure and 0 on success.
The mutex parameter is a mutex previously allocated by DB_ENV->mutex_alloc().
The DB_ENV->mutex_free()
method may fail and return one of the following non-zero errors: