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Merge 'task1/priority-donation' into 'master' #14

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sb3923 merged 66 commits from task1/priority-donation into master 2024-10-23 16:15:45 +00:00
Conversation 35 Commits 66 Files Changed 4 +68 -2
2 changed files with 68 additions and 2 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.