func (i *InterfaceKit) setOnChangeHandler(c chan InterfaceKitChange, t onChangeType) (*C.handler, error) {
h, err := createHandler(func(h *C.handler) C.int {
return C.setOnChangeHandler(i.ifkHandle, h, C.onChangeType(t))
})
if err != nil {
return nil, err
}
go func() {
for {
r := C.onChangeAwait(h)
change := InterfaceKitChange{}
change.Index = int(r.index)
change.Value = int(r.value)
C.onChangeResultFree(r)
select {
case c <- change:
default:
}
}
}()
return h, nil
}
func (i *InterfaceKit) unsetOnChangeHandler(t onChangeType, h **C.handler) {
C.unsetOnChangeHandler(i.ifkHandle, C.onChangeType(t))
C.handlerFree(*h)
*h = nil
}