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sched: Implement generic sleep mechanism based on tasks pending

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Track when tasks are pending and spin in irq_wait() when no tasks are
pending.  This improves the mechanism for sleeping the processor -
it's simpler for the board specific code and it reduces the
possibility of the processor sleeping when tasks are busy.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-08-07 12:33:08 -04:00
parent a9982beacf
commit 2c272f99a3
9 changed files with 60 additions and 80 deletions
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src/sched.h
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@ -30,6 +30,7 @@ void sched_add_timer(struct timer*);
void sched_del_timer(struct timer *del);
unsigned int sched_timer_dispatch(void);
void sched_wake_tasks(void);
uint8_t sched_tasks_busy(void);
void sched_wake_task(struct task_wake *w);
uint8_t sched_check_wake(struct task_wake *w);
uint8_t sched_is_shutdown(void);