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Re: Reading D-Bus messages

From: Ken Brown
Subject: Re: Reading D-Bus messages
Date: Sat, 25 Sep 2010 17:46:52 -0400
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20100915 Thunderbird/3.1.4

On 9/25/2010 12:52 PM, Michael Albinus wrote:
Jan Djärv<address@hidden>  writes:

We should have a general way to add file descriptors and get a
callback for them.  In the mean time, do something like this in

static SELECT_TYPE dbus_mask;

add_dbus_fd (int fd)
   FD_SET (fd,&dbus_mask);
   add_keyboard_wait_descriptor (fd);

remove_dbus_fd (int fd)
   FD_CLR (fd,&dbus_mask);
   remove_keyboard_wait_descriptor (fd);

After this wait_reading_process_output

       /* Check for data from a process.  */
       if (no_avail || nfds == 0)

       for (channel = 0; channel<= max_keyboard_desc; ++channel)
         if (FD_ISSET (channel,&dbus_mask)&&  FD_ISSET (channel,&Available))
                  xd_read_queued_messages ();
                  break; /* All dbus channels has been read, exit loop */

and in init_process:

       FD_ZERO (&dbus_mask);

Use remove_dbus_fd and add_dbus_fd in dbusbind.c.
But maybe I'll add that general input mechanism instead, well see.

I have added this, and it works fine in an X11 environment. I guess,
redisplay() does the job.

If I test it in a non-X11 terminal, arriving D-Bus messages are
recognised only after pressing a character on the keyboard. So at least
an additional trigger is missing to handle this event in time.

Where can I find your changes? I'd like to test it in Cygwin. I tried to make the changes Jan suggested myself, but I found that emacs was blocked after I loaded dbus.el, just as before. I probably did something wrong.


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