[cffi-devel] shareable-byte-vectors for Allegro

[Luís Oliveira]

On Mon, Jan 19, 2009 at 5:50 AM, John Fremlin <jf at msi.co.jp> wrote:
> The advantage of the change is that ptr-var is now actually a foreign
> pointer as it is in all other cffi-ports.
>
> You might not want to pass the ptr-var directly to a function, but
> actually use it as a foreign pointer.
>
> For a concrete example, using the recvmsg(2) system call, you pass a
> structure containing an iovec, which is itself a structure containing
> the base address and length of the buffer into which the message body
> should be written.

That definitely looks like a legitimate use-case. Let us know when you
figure out what the first argument to FF:FSLOT-ADDRESS-TYPED should
be.

-- 
Luís Oliveira
http://student.dei.uc.pt/~lmoliv/