}
/**
- * Remove one Thread from the scheduler. This implementation performs FIFO.
+ * Remove one Thread from the scheduler. This implementation defaults to FIFO,
+ * if a thread is not already provided.
+ *
+ * @param t Thread to run, if chosen by an external entity (e.g.,
+ * ModelChecker). May be NULL to indicate no external choice.
* @return The next Thread to run
*/
-Thread * Scheduler::next_thread()
+Thread * Scheduler::next_thread(Thread *t)
{
- Thread *t = model->schedule_next_thread();
-
if (t != NULL) {
current = t;
readyList.remove(t);