test: litmus: add litmus tests from Nitpicking C++

[model-checker.git] / test / litmus / seq-lock.cc

diff --git a/test/litmus/seq-lock.cc b/test/litmus/seq-lock.cc
new file mode 100644 (file)
index 0000000..447123c
--- /dev/null
+++ b/test/litmus/seq-lock.cc
@@ -0,0 +1,52 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <threads.h>
+#include <atomic>
+
+std::atomic_int x;
+std::atomic_int y;
+std::atomic_int z;
+
+static int N = 1;
+
+static void a(void *obj)
+{
+       for (int i = 0; i < N; i++) {
+               x.store(2 * i + 1, std::memory_order_release);
+               y.store(i + 1, std::memory_order_release);
+               z.store(i + 1, std::memory_order_release);
+               x.store(2 * i + 2, std::memory_order_release);
+       }
+}
+
+static void b(void *obj)
+{
+       printf("x: %d\n", x.load(std::memory_order_acquire));
+       printf("y: %d\n", y.load(std::memory_order_acquire));
+       printf("z: %d\n", z.load(std::memory_order_acquire));
+       printf("x: %d\n", x.load(std::memory_order_acquire));
+}
+
+int user_main(int argc, char **argv)
+{
+       thrd_t t1, t2;
+
+       if (argc > 1)
+               N = atoi(argv[1]);
+
+       printf("N: %d\n", N);
+
+       atomic_init(&x, 0);
+       atomic_init(&y, 0);
+       atomic_init(&z, 0);
+
+       printf("Main thread: creating 2 threads\n");
+       thrd_create(&t1, (thrd_start_t)&a, NULL);
+       thrd_create(&t2, (thrd_start_t)&b, NULL);
+
+       thrd_join(t1);
+       thrd_join(t2);
+       printf("Main thread is finished\n");
+
+       return 0;
+}