Du kan inte välja fler än 25 ämnen
Ämnen måste starta med en bokstav eller siffra, kan innehålla bindestreck ('-') och vara max 35 tecken långa.
41 rader
1012 B
41 rader
1012 B
#include <list.h>
|
|
#include <sync.h>
|
|
#include <proc.h>
|
|
#include <sched.h>
|
|
#include <assert.h>
|
|
|
|
void
|
|
wakeup_proc(struct proc_struct *proc) {
|
|
assert(proc->state != PROC_ZOMBIE && proc->state != PROC_RUNNABLE);
|
|
proc->state = PROC_RUNNABLE;
|
|
}
|
|
|
|
void
|
|
schedule(void) {
|
|
bool intr_flag;
|
|
list_entry_t *le, *last;
|
|
struct proc_struct *next = NULL;
|
|
local_intr_save(intr_flag);
|
|
{
|
|
current->need_resched = 0;
|
|
last = (current == idleproc) ? &proc_list : &(current->list_link);
|
|
le = last;
|
|
do {
|
|
if ((le = list_next(le)) != &proc_list) {
|
|
next = le2proc(le, list_link);
|
|
if (next->state == PROC_RUNNABLE) {
|
|
break;
|
|
}
|
|
}
|
|
} while (le != last);
|
|
if (next == NULL || next->state != PROC_RUNNABLE) {
|
|
next = idleproc;
|
|
}
|
|
next->runs ++;
|
|
if (next != current) {
|
|
proc_run(next);
|
|
}
|
|
}
|
|
local_intr_restore(intr_flag);
|
|
}
|
|
|