sched: add a thread flag to indicate when a thread is scheduled on a runqueue

this prevents runqueue corruption that can occur if rq_enqueue is called on a thread that's already on a runqueue.
2026-03-14 22:22:05 +00:00
parent 7c630ece54
commit 89dac0c951
2 changed files with 19 additions and 1 deletions
--- a/include/kernel/thread.h
+++ b/include/kernel/thread.h
@@ -14,8 +14,11 @@ enum thread_state {
 };

 enum thread_flags {
+	/* this thread has exhausted its quantum and is due to be re-scheduled.
+	 */
 	THREAD_F_NEED_RESCHED = 0x01u,
-	THREAD_F_NO_PREEMPT = 0x02u,
+	/* this thread is currently scheduled (i.e. is present on a runqueue) */
+	THREAD_F_SCHEDULED = 0x04u,
 };

 struct thread {