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41 lines
1012 B
41 lines
1012 B
#include <list.h>
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#include <sync.h>
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#include <proc.h>
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#include <sched.h>
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#include <assert.h>
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void
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wakeup_proc(struct proc_struct *proc) {
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assert(proc->state != PROC_ZOMBIE && proc->state != PROC_RUNNABLE);
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proc->state = PROC_RUNNABLE;
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}
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void
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schedule(void) {
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bool intr_flag;
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list_entry_t *le, *last;
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struct proc_struct *next = NULL;
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local_intr_save(intr_flag);
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{
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current->need_resched = 0;
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last = (current == idleproc) ? &proc_list : &(current->list_link);
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le = last;
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do {
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if ((le = list_next(le)) != &proc_list) {
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next = le2proc(le, list_link);
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if (next->state == PROC_RUNNABLE) {
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break;
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}
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}
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} while (le != last);
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if (next == NULL || next->state != PROC_RUNNABLE) {
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next = idleproc;
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}
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next->runs ++;
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if (next != current) {
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proc_run(next);
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}
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}
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local_intr_restore(intr_flag);
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}
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