Handout

kernel/thread/dispatcher.cc

@@ -0,0 +1,26 @@
+// vim: set noet ts=4 sw=4:
+
+#include "dispatcher.h"
+
+#include "../arch/core.h"
+#include "../debug/output.h"  // IWYU pragma: keep
+
+Dispatcher::Dispatcher() : life(nullptr) {}
+
+Thread *Dispatcher::active() const { return life; }
+
+void Dispatcher::go(Thread *first) {
+	assert(active() == nullptr);
+	setActive(first);
+	first->go();
+}
+
+void Dispatcher::dispatch(Thread *next) {
+	Thread *current = active();
+	assert(current != nullptr);
+	if (current != next) {
+		setActive(next);
+
+		current->resume(next);
+	}
+}