lists_SoCallbackList.h.3coin4 - Man Page

class SoCallbackList
The SoCallbackList is a container for callback function pointers.

typedef void SoCallbackListCB(void *userdata, void *callbackdata)

The type definition for callback functions. The userdata is supplied alongside the function pointer when it is added to the list. When the callback is invoked the specific userdata for that function is supplied, as well as the callbackdata that is sent to all functions invoked.