On Thursday, January 8, 2015 9:59:13 AM UTC-5, Andreas Lobinger wrote: > > Actually i do not want to pass by value. I thought composite types are > references by a pointer (to the first element, like in C) and having mytype > as the type of input parameter would pass the pointer to the library call? >
No, if you want to pass a pointer, then you should declare it as such:
t = mytype(0,0)
ccall(:flip, Void, (Ptr{mytype},), &t)
