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#include "mux/sched.h"
#include "mcu/context.h"
struct tcb_t* volatile current = 0;
static struct tcb_t* volatile idle = 0;
struct list_head ready = LIST_HEAD_INIT(ready);
static void _spawn(struct tcb_t* const tcb, char id) {
tcb->id = id;
tcb->sp = stack_init(tcb->mem_low, tcb->mem_high, tcb->entry, tcb->id);
INIT_LIST_HEAD(&tcb->queue);
}
void spawn(struct tcb_t* const tcb, char id) {
_spawn(tcb, id);
list_add_tail(&tcb->queue, &ready);
}
void spawn_idle(struct tcb_t* const tcb, char id) {
_spawn(tcb, id);
idle = tcb;
}
void yield(void) {
context_save();
schedule();
context_restore();
ret();
}
void sched_init() {
schedule();
context_restore();
sei();
ret();
}
#include <avr/io.h>
void toggle_led() {
DDRB |= (1 << 7);
PORTB ^= (1 << 7);
}
void schedule() {
toggle_led();
if(!list_empty(&ready)) {
current = list_entry(ready.next, struct tcb_t, queue);
list_move_tail(ready.next, &ready);
debug_led(0,1);
} else {
current = idle;
debug_led(0,0);
}
}
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