From: "Jeffrey R. Carter" <spam@spam.com>
Subject: Re: Interfacing to C and void*
Date: Mon, 20 Feb 2006 18:54:54 GMT
Date: 2006-02-20T18:54:54+00:00 [thread overview]
Message-ID: <2goKf.3760$JR6.1501@newsread3.news.pas.earthlink.net> (raw)
In-Reply-To: <43fa0960$0$505$9b4e6d93@newsread4.arcor-online.net>
Georg Bauhaus wrote:
> Maciej Sobczak wrote:
>
>>Suppose I have the following two C functions:
>>
>>void * factory();
>
> I have seen System.Address used for this.
Not good practice, since System.Address need not correspond to a C pointer.
Generally, void* is never dereferenced, so any C-convention access type is
suitable. I usually use
type Void_Ptr is access all Integer;
pragma Convention (C, Void_Ptr);
function Factory return Void_Ptr;
pragma Import (C, Factory, "factory");
--
Jeff Carter
"Alms for an ex-leper!"
Monty Python's Life of Brian
75
next prev parent reply other threads:[~2006-02-20 18:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-20 15:19 Interfacing to C and void* Maciej Sobczak
2006-02-20 18:24 ` Georg Bauhaus
2006-02-20 18:54 ` Jeffrey R. Carter [this message]
2006-02-20 19:01 ` Martin Krischik
2006-02-20 19:41 ` Martin Dowie
2006-02-21 8:09 ` Alex R. Mosteo
2006-02-21 18:47 ` Martin Krischik
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