Hi Benjamin, On Fri, Jan 06, 2012 at 07:00:22PM +0100, Benjamin Tissoires wrote: > Hi guys, > I read somewhere in the code of Android a comment in which they > complain about not being able to retrieve the slots states. So they > assume they are all at 0. > So this mechanism is good to have. > However, back in January 2011, Dmitry raised the problem that this > code was not thread safe.What happens if 2 applications ask for > different slots values (let say X.org and utouch-frame)? 2 different processes should be fine; the problem would be if 2 threads of the same process share the same file descriptor. So far the rest of evdev copes just fine with multiple threads using the same fd (all operations are atomic in this regard), setting ABS_MT_SLOT before fetching the state break this property. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
