(g-signal-emitv params (signal-info-id signal-info) signal-name (null-pointer))
(with-foreign-object (return-value 'g-value)
(g-value-zero return-value)
(g-signal-emitv params (signal-info-id signal-info) signal-name (null-pointer))
(with-foreign-object (return-value 'g-value)
(g-value-zero return-value)