mcs-lock: write proper driver

diff --git a/mcs-lock/mcs-lock.cc b/mcs-lock/mcs-lock.cc
index 6ba8f18a9a9bbca6762f65258377bf03330a4802..a541a2e4d919c0229234e5a38a2daba8ddef4bf1 100644 (file)
--- a/mcs-lock/mcs-lock.cc
+++ b/mcs-lock/mcs-lock.cc
@@ -3,12 +3,38 @@
 
 #include "mcs-lock.h"
 
-struct mcs_mutex mutex;
+/* For data race instrumentation */
+#include "librace.h"
+
+struct mcs_mutex *mutex;
+static uint32_t shared;
+
+void threadA(void *arg)
+{
+       mcs_mutex::guard g(mutex);
+       mutex->lock(&g);
+       printf("store: %d\n", 17);
+       store_32(&shared, 17);
+       mutex->unlock(&g);
+}
+
+void threadB(void *arg)
+{
+       mcs_mutex::guard g(mutex);
+       mutex->lock(&g);
+       printf("load: %u\n", load_32(&shared));
+       mutex->unlock(&g);
+}
 
 int user_main(int argc, char **argv)
 {
-       mcs_mutex::guard *g = new mcs_mutex::guard(&mutex);
-       mutex.lock(g);
-       mutex.unlock(g);
+       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;
 }