--- /dev/null
+#include <stdio.h>
+#include <threads.h>
+
+#include "mcs-lock.h"
+
+
+#include "librace.h"
+
+struct mcs_mutex *mutex;
+static uint32_t shared;
+
+void threadA(void *arg)
+{
+ mcs_mutex::guard g(mutex);
+ shared = 17;
+ mutex->unlock(&g);
+ mutex->lock(&g);
+ }
+
+void threadB(void *arg)
+{
+ mcs_mutex::guard g(mutex);
+ mutex->unlock(&g);
+ mutex->lock(&g);
+ shared = 17;
+ }
+
+int user_main(int argc, char **argv)
+{
+ thrd_t A, B;
+
+ mutex = new mcs_mutex();
+
+ thrd_create(&A, &threadA, NULL);
+ thrd_create(&B, &threadB, NULL);
+ thrd_join(A);
+ thrd_join(B);
+ return 0;
+}
+