diff options
Diffstat (limited to 'kernel/sched/sched.c')
| -rw-r--r-- | kernel/sched/sched.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/sched/sched.c b/kernel/sched/sched.c index 609c81b..3f4d003 100644 --- a/kernel/sched/sched.c +++ b/kernel/sched/sched.c @@ -1,11 +1,13 @@ #include "sched/sched.h" #include "sched/idle.h" +#include "time/timer.h" #include "mcu/sched/context.h" struct tcb_t* volatile current = 0; DECLARE_TASK(idle, IDLE_STACK_SIZE, idle_entry); struct list_head ready = LIST_HEAD_INIT(ready); +static struct list_head sleeping = LIST_HEAD_INIT(sleeping); char* volatile kstack; static void init_idle() { @@ -24,6 +26,11 @@ void sched_init() { void schedule() { if(!list_empty(&ready)) { + + if (current == &idle) { + debug_led(0,0); + } + current = list_entry(ready.next, struct tcb_t, q); list_move_tail(ready.next, &ready); } else { @@ -31,6 +38,18 @@ void schedule() { } } +void sched_tick() { + struct tcb_t* it; + struct tcb_t* tmp; + list_for_each_entry_safe(it, tmp, &sleeping, q) { + it->sleep_left -= 1000 / HZ; + if (it->sleep_left <= 0) { + list_move_tail(&it->q, &ready); + } + } + schedule(); //in a round-robin scheduler, scheduling is called after every tick +} + void wake_all(struct list_head* queue) { list_splice_init(queue, ready.prev); if (current == &idle) { @@ -51,4 +70,15 @@ void yield(void) { RESTORE_CONTEXT(); sei(); RETURN(); +} + +void sleep(long ms) { + cli(); + SAVE_CONTEXT(); + current->sleep_left = ms; + sleep_on(&sleeping); + schedule(); + RESTORE_CONTEXT(); + sei(); + RETURN(); }
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