1 files changed, 37 insertions, 5 deletions
diff --git a/tests/mutex3.c b/tests/mutex3.c
index 2bb6106..26cb070 100644
--- a/tests/mutex3.c
+++ b/tests/mutex3.c
@@ -1,12 +1,44 @@
-#include <pthread.h>
+/* 
+ * mutex3.c
+ *
+ * Declare a static mutex object, lock it, trylock it, 
+ * and then unlock it again.
+ *
+ * Depends on API functions: 
+ *	pthread_mutex_lock()
+ *	pthread_mutex_trylock()
+ *	pthread_mutex_unlock()
+ */
 
-pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+#include "test.h"
+ 
+pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
 
+static int washere = 0;
+
+void * func(void * arg)
+{
+  assert(pthread_mutex_trylock(&mutex1) == EBUSY);
+
+  washere = 1;
+
+  return 0; 
+}
+ 
 int
 main()
 {
-  pthread_mutex_lock(&mutex);
-  /* do stuff */
-  pthread_mutex_unlock(&mutex);
+  pthread_t t;
+
+  assert(pthread_mutex_lock(&mutex1) == 0);
+
+  assert(pthread_create(&t, NULL, func, NULL) == 0);
+
+  Sleep(2000);
+
+  assert(pthread_mutex_unlock(&mutex1) == 0);
+
+  assert(washere == 1);
+
   return 0;
 }