/**
* Finish the current thread and schedule it to be destroyed when it is safe to do so. This method
* is automatically called when a thread's <tt>run</tt> method returns, but it may also be called
* directly.
*
* <p>The current thread cannot be immediately destroyed because its stack and other execution
* state are still in use. Instead, this thread will be destroyed automatically by the next thread
* to run, when it is safe to delete this thread.
*/
public static void finish() {
Lib.debug(dbgThread, "Finishing thread: " + currentThread.toString());
Machine.interrupt().disable();
Machine.autoGrader().finishingCurrentThread();
Lib.assertTrue(toBeDestroyed == null);
toBeDestroyed = currentThread;
currentThread.status = statusFinished;
KThread aux = null;
if (joinList.size() > 0) {
aux = joinList.getFirst();
}
if (aux != null) {
aux.ready();
joinList.removeFirst();
}
sleep();
}
/** Determine the next thread to run, then dispatch the CPU to the thread using <tt>run()</tt>. */
private static void runNextThread() {
KThread nextThread = readyQueue.nextThread();
if (nextThread == null) nextThread = idleThread;
nextThread.run();
}