how to emit signal in a static function ?

[cxl2253]

I am sorry.My expression is poor.my problem is that i want to emit signal in the static function which will be used as a param in a callback function. why i must use the callback? because i use a third party libarary ,it used the callback, i have to do it. why i want to emit signal in the static function? I want to let the static function to inform its status and other can response alternatively.
Now the problem is that the emited signal cannot be recieved. tommorrow i will give the detail code, thanks all.