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Update set priority to reorder the list if priority is changed

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sBubshait
2024-10-17 06:38:27 +01:00
parent 949455aae5
commit dbb7fd56e3
1 changed files with 9 additions and 0 deletions
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9
src/threads/thread.c
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@@ -391,6 +391,15 @@ thread_set_priority (int new_priority)
enum intr_level old_level = intr_disable (); enum intr_level old_level = intr_disable ();
/* If the thread is in the ready list, the list must be reordered to maintain
the priority order. */
if (thread_current ()->status == THREAD_READY) {
/* Remove from the ready list and reinsert it in priority order. */
list_remove (&thread_current ()->elem);
list_insert_ordered (&ready_list, &thread_current ()->elem, priority_more,
NULL);
}
if (new_priority < old_priority && !list_empty (&ready_list)) { if (new_priority < old_priority && !list_empty (&ready_list)) {
/* If the new priority is lower than the old priority, check if the current /* If the new priority is lower than the old priority, check if the current
thread no longer has the highest priority. If it doesn't, yield the CPU. thread no longer has the highest priority. If it doesn't, yield the CPU.