From: Xavier Leroy <Xavier.Leroy@inria.fr>
To: malc <malc@pulsesoft.com>
Cc: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>,
roessler@rftp.com, caml-list@inria.fr
Subject: Re: [Caml-list] A pair of "Interfacing with C" questions
Date: Sat, 23 Jul 2005 14:14:47 +0200 [thread overview]
Message-ID: <42E234B7.3070608@inria.fr> (raw)
In-Reply-To: <Pine.LNX.4.61.0507211427560.1397@home.oyster.ru>
>> If you look at mlvalues.h you will see that nativeint is define as
>> long int. So this should be the natural format for a pointer.
>
>
> I don't think so, Win64 ABI has sizeof(long) == 4 and sizeof(void *) == 8.
... which is why a port of OCaml to Win64 would use long long (or,
better, intptr_t, if available) for the C type "value" and the Caml
type "nativeint".
In other terms, OCaml values are integers big enough to hold a
pointer, and the type nativeint has (by construction) the same size as
a value.
- Xavier Leroy
prev parent reply other threads:[~2005-07-23 12:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-21 4:53 Robert Roessler
[not found] ` <8210502975.20050721082753@moldavcable.com>
2005-07-21 5:44 ` [Caml-list] " Robert Roessler
2005-07-21 10:21 ` Jacques Garrigue
2005-07-21 10:29 ` malc
2005-07-21 11:51 ` Jacques Garrigue
2005-07-22 5:26 ` Robert Roessler
2005-07-22 9:31 ` Alexander S. Usov
2005-07-23 12:14 ` Xavier Leroy [this message]
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