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authorKeith Packard <keithp@keithp.com>2012-10-25 13:42:10 -0700
committerKeith Packard <keithp@keithp.com>2012-10-26 14:07:04 -0700
commite57ab2a7bfb69c0ef9b5b7fa8e53e20a500e7c6c (patch)
tree08d961311a7d2e7612d5c9aa090fd7a1dcdd53e6 /src/core/ao_task.h
parentccf0faa7d26d56deca7928b521d07be40504466a (diff)
altos: Provide ao_task_alarm_tick to reduce per-tick cost
Cache the next wakeup time and check that before jumping to the task code. Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src/core/ao_task.h')
-rw-r--r--src/core/ao_task.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/core/ao_task.h b/src/core/ao_task.h
index b3f152a0..049f69a7 100644
--- a/src/core/ao_task.h
+++ b/src/core/ao_task.h
@@ -82,6 +82,7 @@ ao_add_task(__xdata struct ao_task * task, void (*start)(void), __code char *nam
#if HAS_TASK_QUEUE
/* Called on timer interrupt to check alarms */
+extern uint16_t ao_task_alarm_tick;
void
ao_task_check_alarm(uint16_t tick);
#endif