X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-1.8 required=5.0	tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE
X-Spam-Check-By: sourceware.org
From: Michael Albinus <michael DOT albinus AT gmx DOT de>
To: Ken Brown <kbrown AT cornell DOT edu>
Cc: emacs-devel <emacs-devel AT gnu DOT org>, cygwin AT cygwin DOT com
Subject: Re: Reading D-Bus messages
References: <878w2tx6gk DOT fsf AT gmx DOT de> <4C9A493F DOT 4050701 AT cornell DOT edu>
Date: Thu, 23 Sep 2010 09:19:37 +0200
Message-ID: <874odhyliu.fsf@gmx.de>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

Ken Brown <kbrown AT cornell DOT edu> writes:

> Hi Michael,

Hi Ken,

>> I do not understand all details of keyboard.c. Is there something I need
>> to set in order to urge the call of xd_read_queued_messages (via
>> gobble_input)? Or do I need to suppress further polling? What is the
>> difference for Emacs running with cygwin, compared with the GNU/Linux case?
>>
>> Btw, when I call xd_read_queued_messages inside xd_pending_messages,
>> everything works fine also with cygwin. But I guess this isn't the
>> correct solution.
>
> I don't know enough to attempt an answer.  Is there any chance you
> could write a small self-contained program that exhibits the problem?
> If so, there's a chance someone on the Cygwin list could help.

The problem seems to be how gobble_input is called in kbd_buffer_get_event
(keyboard.c):

/* Note SIGIO has been undef'd if FIONREAD is missing.  */
#ifdef SIGIO
      gobble_input (0);
#endif /* SIGIO */

SIGIO is undefined, and gobble_input is not called under cygwin
therefore. If I remove this conditional directive, D-Bus connections in
Emacs work fine! What is the reason, that SIGIO is undefined under cygwin?

> Ken

Best regards, Michael.

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple