#include <db.h> int DB_ENV->lock_put(DB_ENV *env, DB_LOCK *lock);
         The DB_ENV->lock_put() method releases lock.
    
         The DB_ENV->lock_put() 
            
                  method returns a non-zero error value on failure and 0 on success.
            
            
        
    
                         The DB_ENV->lock_put() 
            
                 method may fail and return one of the following non-zero errors: