From 2eefb5acb847eeb2d10bac860d37c4cef00be67b Mon Sep 17 00:00:00 2001 From: Miika Pekkarinen Date: Sun, 11 Mar 2007 10:52:36 +0000 Subject: Optimized the gui list code performance, including automatic frame dropping and cpu boosting when button events are getting queued. Improved scrollwheel acceleration code is needed to notice a real change. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12721 a1c6a512-1295-4272-9138-f99709370657 --- firmware/kernel.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'firmware/kernel.c') diff --git a/firmware/kernel.c b/firmware/kernel.c index db7249f..c304e45 100644 --- a/firmware/kernel.c +++ b/firmware/kernel.c @@ -374,6 +374,27 @@ void queue_remove_from_head(struct event_queue *q, long id) set_irq_level(oldlevel); } +/** + * The number of events waiting in the queue. + * + * @param struct of event_queue + * @return number of events in the queue + */ +int queue_count(const struct event_queue *q) +{ + int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL); + int result = 0; + + if (q->read <= q->write) + result = q->write - q->read; + else + result = QUEUE_LENGTH - (q->read - q->write); + + set_irq_level(oldlevel); + + return result; +} + int queue_broadcast(long id, intptr_t data) { int i; -- cgit v1.1