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author | Nicolas Pennequin <nicolas.pennequin@free.fr> | 2007-10-27 18:08:18 +0000 |
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committer | Nicolas Pennequin <nicolas.pennequin@free.fr> | 2007-10-27 18:08:18 +0000 |
commit | 1839edf64ad0a4b6d96a5dd5ce24ab8075954dc6 (patch) | |
tree | 6b31c67e9168ae2c47eba9f3205f69bdd1328d42 /uisimulator | |
parent | 41add08c5edb9d3de7e223e860cef035b41a3b01 (diff) | |
download | rockbox-1839edf64ad0a4b6d96a5dd5ce24ab8075954dc6.tar.gz rockbox-1839edf64ad0a4b6d96a5dd5ce24ab8075954dc6.zip |
Add queue_peek to the kernel (written by Mike Sevakis), and use it to improve upon my previous commit.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15336 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'uisimulator')
-rw-r--r-- | uisimulator/sdl/kernel.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/uisimulator/sdl/kernel.c b/uisimulator/sdl/kernel.c index 96654d50ac..220d069721 100644 --- a/uisimulator/sdl/kernel.c +++ b/uisimulator/sdl/kernel.c @@ -405,6 +405,26 @@ bool queue_empty(const struct event_queue* q) return ( q->read == q->write ); } +bool queue_peek(struct event_queue *q, struct queue_event *ev) +{ + if (q->read == q->write) + return false; + + bool have_msg = false; + + int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL); + + if (q->read != q->write) + { + *ev = q->events[q->read & QUEUE_LENGTH_MASK]; + have_msg = true; + } + + set_irq_level(oldlevel); + + return have_msg; +} + void queue_clear(struct event_queue* q) { int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL); |