I think I might have been unclear about what I was asking. If we assume I have that same code you just posted, how would I go about using it through the Racket FFI? I know I can define a _my_c_struct-pointer, but how do I make a pointer to that pointer to pass to the C function?
On Jun 10, 2012, at 5:42 AM, Joshua Ewulo <[email protected]> wrote: > Say you have a struct. > struct my_c_struct {}; > my_c_struct *ptr = 0; // uninitialised pointer > > You need to prototype the function with a pointer to a pointer > void my_func(my_c_struct **pptr); > > void my_func(my_c_struct **pptr) > { > *ptr = new my_c_struct; > if (!*ptr) printf ("error no memory\n"); > else printf ("aye memory\n"); > } > > > > > > > On 10 June 2012 01:57, Vince Kuyatt <[email protected]> wrote: > I need to be able to define a variable which is an un-initialized pointer to > a C struct, then pass a reference to that pointer to a C function. How would > I go about doing this? > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > >
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