Re: detecting when keys are being pressed on a keyboard
flat view
From: Jiri Kosina <hidden>
Date: 2007-09-24 13:45:59
On Mon, 24 Sep 2007, Oliver Neukum wrote:
quoted
HID doesn't keep any permanent state by itself. If you want to know whether a given key is currently pressed or not, you'd have to inspect the bitfields inside input_dev*, I am afraid.I see no way to do this without a race condition. The field isn't locked as far as I can tell.
Hi Oliver, Dmitry (CC added) has been doing a lot of rework of locking in input as far as I know. He would know this better.
Secondly, what is to happen in case of a system wide suspend? Will the system wake up thinking that the key is still pressed?
If the release event didn't happen before the machine went to suspend, I'd say so. -- Jiri Kosina ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel