CFMessagePortGetInvalidationCallBack(_:)
Returns the invalidation callback function for a CFMessagePort object.
Declaration
func CFMessagePortGetInvalidationCallBack(_ ms: CFMessagePort!) -> CFMessagePortInvalidationCallBack!Parameters
- ms:
The message port to examine.
Return Value
The callback function invoked when ms is invalidated. NULL if no callback has been set with CFMessagePortSetInvalidationCallBack(_:_:).