11:55 < hansg> teuf, I'm currently re-doing some of the usb-device-manager 
               stuff. One of the things I got wrong is that I didn't keep in 
               mind that one process can have multiple sessions open (think 
               vinagre with 2 spice tabs) 
11:57 < hansg> teuf, it seems you've made the same mistake with the 
               smartcard stuff. 
11:58 < hansg> Hmm, never mind, it seems all transfer to / from the reader 
               happen by: vreader_xfr_bytes, so as long as the 2 sessions 
               are handled by the same thread, all should be will I think
12:00 < hansg> One problem could be the use of vreader_set_id, actually 
               looking at the code, this will trigger for a second session: 
               g_return_if_fail(vreader_get_id(reader) == -1);
12:01 < hansg> I guess the mapping of ids -> readers should be moved to 
               channel-smartcard.c instead of relying on the mapping inside 
               libcacard (assuming that the id is only used for mapping and 
               not for other uses inside libcacard)
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12:04 < teuf> hansg: I definitely haven't thought at all about multiple 
              widget instances in the same process while doing the smartcard 
              stuff
12:05 < hansg> teuf, yeah I know that feeling :)
12:05 < teuf> :)
12:05 < hansg> Note multiple widgets (aka SpiceDisplay) != multiple sessions
12:05 < hansg> One session can have multiple widgets (think multi monitor)
12:05 < teuf> ah yup
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12:07 < hansg> Luckily for the smartcard stuff the widget does not seem to 
               do to much, actually the only thing it does is do a 
               spice_channel_connect() on the smartcard channel. So with a 
               multi mon setup this will happen multiple times, but 
               spice-channel.c protects against this
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12:13 < hansg> Hmm, channel-smartcard.c will try to send messages on 
               smartcard reader detection even if the channel is not 
               connected (think an app using spice-client-glib but not 
               spice-client-gtk)