Thread (45 messages) 45 messages, 8 authors, 2012-08-29

Re: [PATCH 02/19] Input: Improve the events-per-packet estimate

From: Henrik Rydberg <hidden>
Date: 2012-08-14 19:58:01
Also in: linux-input

Hi Ping,

Long time no see. :-)
quoted
+       /* Make room for KEY and MSC events */
+       events += 7;
It is nice to get rid of the redundant pieces and to incorporate
common functions. Thank you.

I have a question about the code above though.  Why do we use 7
instead of going through the keys like:

	for (i = 0; i < KEY_MAX; i++)
		if (test_bit(i, dev->keybit))
			events++;
Keyboards register a large amount of different keys, but seldom send
more than one or two at a time. The value 7 is ad hoc, admittedly, but
it makes the default buffer 8 bytes, which happens to precisely match
the default buffer in evdev.

Thanks,
Henrik
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help