From: Robert Roessler <roessler@rftp.com>
To: Caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] A pair of "Interfacing with C" questions
Date: Thu, 21 Jul 2005 22:26:46 -0700 [thread overview]
Message-ID: <42E08396.4040502@rftp.com> (raw)
In-Reply-To: <20050721.205120.112787682.garrigue@math.nagoya-u.ac.jp>
Jacques Garrigue wrote:
> From: malc <malc@pulsesoft.com>
>
>>>>I assume the other choices include int64, nativeint, or even int.
>>>
>>>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.
>
>
> Aargh, they seem to like to break everything!
> Anyway, I suppose it just means that ocaml would have to define value
> as a long long int on Win64, to make it behave like other
> architectures.
> The sources are full of casts from value to (value *) and back.
> Rather, this is going to be a pain to port many C libraries, that
> assume that you can convert between a long and a pointer and back.
I was worried about something like the Win64 silliness... ;)
Said silliness aside, I will go ahead and switch to nativeint - thanks.
Robert Roessler
roessler@rftp.com
http://www.rftp.com
next prev parent reply other threads:[~2005-07-22 5:26 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 [this message]
2005-07-22 9:31 ` Alexander S. Usov
2005-07-23 12:14 ` Xavier Leroy
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