From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: How to get the mouse position with JEWL?
Date: Fri, 22 Oct 2010 09:35:56 +0200
Date: 2010-10-22T09:35:53+02:00 [thread overview]
Message-ID: <1bj1nrjki5whg.4lon33snqtk0$.dlg@40tude.net> (raw)
In-Reply-To: i9qmfq$t12$1@speranza.aioe.org
On Fri, 22 Oct 2010 00:39:22 +0000 (UTC), tmoran@acm.org wrote:
>>> 3. My copy of win32.ads declares
>>> subtype PVOID is System.Address;
>>> System.Address is not the same as an access value to my preferred Ada
>>> compiler.
>>
>> But PVOID is an address, if an Ada's access type is not, then it cannot be
>> used for PVOID.
> An "address" on a Wintel architecture is a segment and an offset.
> (remember memory models?)
Yes. But Win32 has flat memory model, so PVOID is must be a far pointer at
least. [ BTW, it is not certain what is "address", virtual? physical? The
OS API may remap process addresses to the kernel ones etc. ]
> So Janus Ada's System.Address is a segment
> and an offset. PVOID is a C pointer, which is only an offset, the same as
> an Ada access value in Janus Ada.
There is no reason why Ada access type (without the Convention pragma)
should be equivalent to C pointer.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2010-10-22 7:35 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-20 9:04 How to get the mouse position with JEWL? tolkamp
2010-10-20 11:42 ` Manuel Collado
2010-10-20 17:20 ` tolkamp
2010-10-20 22:22 ` Manuel Collado
2010-10-20 22:51 ` tmoran
2010-10-21 2:59 ` Jeffrey Carter
2010-10-21 4:08 ` tmoran
2010-10-21 7:31 ` Dmitry A. Kazakov
2010-10-21 19:10 ` tmoran
2010-10-21 19:38 ` Dmitry A. Kazakov
2010-10-22 0:39 ` tmoran
2010-10-22 7:35 ` Dmitry A. Kazakov [this message]
2010-10-22 10:10 ` Frank J. Lhota
2010-10-21 15:23 ` tolkamp
2010-10-21 16:47 ` Georg Bauhaus
2010-10-21 17:09 ` tolkamp
2010-10-21 17:24 ` Niklas Holsti
2010-10-21 20:34 ` tolkamp
2010-10-22 13:55 ` tolkamp
2010-10-22 22:15 ` Manuel Collado
2010-10-23 15:26 ` tolkamp
2010-10-21 21:50 ` Manuel Collado
2010-10-22 10:40 ` tolkamp
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