Freezerburn wrote:
> [...]
> 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?
> [...]
Hello,
you probably want an output parameter created using a
(_ptr o _my_c_struct-pointer)
argument type specification in the binding of th
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
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");
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