From: Simon Wright <simon@pushface.org>
Subject: Re: Pass by reference
Date: 10 Apr 2004 07:33:14 +0100
Date: 2004-04-10T07:33:14+01:00 [thread overview]
Message-ID: <x7vlll4mjf9.fsf@smaug.pushface.org> (raw)
In-Reply-To: uktd7053i4e577hcbu39umeu1rtorul3rk@jellix.jlfencey.com
Vinzent 'Gadget' Hoefler <nntp-2004-04@t-domaingrabbing.de> writes:
> Pat Rogers wrote:
>
> >If you made the type volatile that would also force by-reference.
C.6(18): If a type is atomic or volatile and it is not a by-copy type,
then the type is defined to be a by-reference type. If any
subcomponent of a type is atomic or volatile, then the type is defined
to be a by-reference type.
> Are you sure? I'm just looking at the assembly ouput of GNAT for a
> procedure that takes a volatile type (memory mapped register) and it
> does't seem so. Even worse, it optimizes the sequence of assignment
> which I need for this register. If you have any idea how can I avoid
> using access types to make it right, I'd be glad to hear it.
I think you need to use inline assembler to be sure.
And to be really sure you may need to use Volatile => True on the
call, I had to (this was GNAT/PowerPC, by the way).
--
Simon Wright 100% Ada, no bugs.
next prev parent reply other threads:[~2004-04-10 6:33 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-08 14:52 Pass by reference Dan McLeran
2004-04-08 18:21 ` Martin Krischik
2004-04-09 12:53 ` Dan McLeran
2004-04-13 12:42 ` Martin Krischik
2004-04-08 19:04 ` Jim Rogers
2004-04-09 3:24 ` Dan McLeran
2004-04-09 0:01 ` Stephen Leake
2004-04-09 12:38 ` Dan McLeran
2004-04-09 13:03 ` Dmitry A. Kazakov
2004-04-09 19:09 ` Dan McLeran
2004-04-10 10:49 ` Dmitry A. Kazakov
2004-04-11 12:43 ` Florian Weimer
2004-04-12 10:29 ` Dmitry A. Kazakov
2004-04-12 12:29 ` Samuel Tardieu
2004-04-13 8:46 ` Dmitry A. Kazakov
2004-04-10 1:42 ` Stephen Leake
2004-04-10 16:05 ` chris
2004-04-09 12:44 ` Dan McLeran
2004-04-09 22:44 ` Randy Brukardt
2004-04-09 14:44 ` Simon Wright
2004-04-09 1:15 ` Jeffrey Carter
2004-04-09 1:28 ` Pat Rogers
2004-04-10 1:05 ` Jeffrey Carter
2004-04-09 12:57 ` Dan McLeran
2004-04-10 1:16 ` Jeffrey Carter
2004-04-09 4:03 ` Steve
2004-04-09 14:50 ` Simon Wright
2004-04-09 17:12 ` Pat Rogers
2004-04-09 19:33 ` Vinzent 'Gadget' Hoefler
2004-04-10 6:33 ` Simon Wright [this message]
2004-04-13 10:26 ` Vinzent 'Gadget' Hoefler
2004-04-14 17:27 ` Simon Wright
2004-04-15 9:43 ` Vinzent 'Gadget' Hoefler
2004-04-17 7:59 ` Simon Wright
2004-04-11 12:45 ` Florian Weimer
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