Simple scheduler

src/kernel/proc/scheduler.c

@@ -0,0 +1,26 @@
+#include <thread.h>
+
+struct {
+  struct thread *first;
+  struct thread *last;
+} readyQ = {0,0};
+
+void ready(struct thread *th)
+{
+  if(!readyQ.last)
+  {
+    th->tcb.next = 0;
+    readyQ.first = readyQ.last = th;
+  } else {
+    readyQ.last->tcb.next = th;
+    readyQ.last = th;
+  }
+}
+
+struct thread *scheduler_next()
+{
+  struct thread *th = readyQ.first;
+  if(!(readyQ.first = th->tcb.next))
+    readyQ.last = 0;
+  return th;
+}