Handout

kernel/thread/idlethread.h

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+/*! \file
+ *  \brief \ref IdleThread executed by the \ref Scheduler if no other \ref
+ * Thread is ready
+ */
+
+#pragma once
+#include "../types.h"
+#include "thread.h"
+
+/*! \brief Thread that is executed when there is nothing to do for this core.
+ *  \ingroup thread
+ *
+ * Using the IdleThread simplifies the idea of waiting and is an answer to the
+ * questions that arise once the ready queue is empty.
+ *
+ * \note Instance of this class should *never* be inserted into the scheduler's
+ *       ready queue, as the IdleThread should only be executed if there is no
+ *       proper work to do.
+ */
+class IdleThread : public Thread {
+   public:
+	explicit IdleThread() : Thread() {}
+
+	/*! \brief Wait for a thread to become ready and sleep in the meantime.
+	 *
+	 */
+	void action() override;
+};