On Thu, 25 Aug 2011 19:19:41 +0200, Frank Goenninger said:
(setq res (foreign-funcall-pointer query-interface-ptr () :pointer plugInInterface CFUUIDBytes (cf-uuid-get-uuid-bytes kIOUSBDeviceInterfaceID) :pointer (foreign-slot-pointer privateDataRef 'MyPrivateData 'deviceInterface))) ...
This code "crashes" with signal 100 as reported by AllegroCL in the call to foreign-funcall-pointer ...
I suspect the problem is the UUID argument, not the pointer.
CFUUIDBytes is a struct type, i.e. you need to pass the aggregate by value. IIRC, CFFI doesn't support that.
__Martin