Hi everyone,
I am working on an FFI which overall progresses well - the Racket FFI
library is really a very nice tool to have.
The one problem I couldn't solve yet is handling resource allocation. My
use case is very similar to what allocator/deallocator are meant for,
except that the allocated object is not the return value of any
function, and therefore I cannot use allocator.
I have an API like
int make_foo(foo** new_foo);
int destroy_foo(foo* a_foo);
so my FFI definitions look like
(define _foo (_cpointer 'foo))
(define-fooapi make-foo
(_fun (foo : (_ptr o _foo)
-> (r : _int)
-> (values r foo))
(define-fooapi destroy-foo
(_fun _foo -> _void))
Given that make-foo returns two values, I cannot use #:wrap to make it
an allocator.
Since the C API I am wrapping is pretty standard, I suspect others have
had this problem before. Any suggestions?
Thanks in advance,
Konrad.
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