From: Erik de Castro Lopo <mle+ocaml@mega-nerd.com>
To: caml-list@inria.fr
Subject: [Caml-list] Val_int vs caml_copy_nativeint
Date: Mon, 8 Aug 2011 13:15:04 +1000 [thread overview]
Message-ID: <20110808131504.d9137220d4b4401cc3450e5a@mega-nerd.com> (raw)
Hi all,
I'm writing a C stub function to allow the calling of a C library
function from ocaml. The return from the stub is a tuple and I'm
doing this:
/* Package up the result as a tuple. */
v_response = caml_alloc_tuple (3) ;
Store_field (v_response, 0, Val_int (width)) ;
Store_field (v_response, 1, Val_int (height)) ;
Store_field (v_response, 2, caml_copy_string (code)) ;
CAMLreturn (v_response) ;
The above works now, but didn't work when I was using
caml_copy_nativeint() instead of Val_int() and I'd like to know
why. I found it especially confusing because caml_copy_string()
worked and was obvioulsy the right thing to do.
Cheers,
Erik
--
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
next reply other threads:[~2011-08-08 3:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-08 3:15 Erik de Castro Lopo [this message]
2011-08-08 3:48 ` Romain Beauxis
2011-08-08 3:59 ` Guillaume Yziquel
2011-08-08 7:49 ` Erik de Castro Lopo
2011-08-08 3:53 ` Guillaume Yziquel
2011-08-08 7:46 ` Erik de Castro Lopo
2011-08-08 8:03 ` Guillaume Yziquel
2011-08-08 9:17 ` Mathias Kende
2011-08-08 17:24 ` Xavier Leroy
2011-08-09 1:33 ` Erik de Castro Lopo
2011-08-09 1:40 ` Romain Beauxis
2011-08-09 8:44 ` David Allsopp
2011-08-09 10:07 ` malc
2011-08-09 10:43 ` David Allsopp
2011-08-09 22:53 ` Erik de Castro Lopo
2011-08-10 6:43 ` Gabriel Scherer
2011-08-08 5:20 ` malc
2011-08-08 6:01 ` Guillaume Yziquel
2011-08-08 6:22 ` malc
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