2 files changed, 15 insertions, 0 deletions
diff --git a/tests/mutex1.c b/tests/mutex1.c
index 087483d..27e2a82 100644
--- a/tests/mutex1.c
+++ b/tests/mutex1.c
@@ -9,9 +9,12 @@
 
 pthread_mutex_t mutex1;
 
+int
 main()
 {
   pthread_mutex_init(&mutex1, NULL);
   pthread_mutex_lock(&mutex1);
   pthread_mutex_unlock(&mutex1);
+
+  return 0;
 }
diff --git a/tests/mutex2.c b/tests/mutex2.c
new file mode 100644
index 0000000..224b7ea
--- /dev/null
+++ b/tests/mutex2.c
@@ -0,0 +1,12 @@
+#include <pthread.h>
+ 
+pthread_mutex_t mutex1;
+ 
+main()
+{
+  pthread_mutex_init(&mutex1, NULL);
+  pthread_mutex_trylock(&mutex1);
+  pthread_mutex_unlock(&mutex1);
+
+  return 0;
+}