#include <db_cxx.h>

class DbLock {
public:
	DbLock();
	DbLock(const DbLock &);
	DbLock &operator = (const DbLock &);
	~DbLock();
};

The locking interfaces for the Berkeley DB database environment are methods of the DbEnv handle. The DbLock object is the handle for a single lock, and has no methods of its own.