* winsup.api/pthread/mutex8e.c: New testcase.

* winsup.api/pthread/mutex8n.c: Ditto.
* winsup.api/pthread/mutex8r.c: Ditto.

winsup/testsuite/winsup.api/pthread/mutex8r.c

@@ -0,0 +1,37 @@
+/* 
+ * mutex8r.c
+ *
+ * Tests PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP.
+ *
+ * Depends on API functions: 
+ *	pthread_mutex_lock()
+ *	pthread_mutex_unlock()
+ */
+
+#include "test.h"
+ 
+pthread_mutex_t mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+
+int
+main()
+{
+  assert(mutex == PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP);
+
+  assert(pthread_mutex_lock(&mutex) == 0);
+
+  assert(mutex != PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP);
+
+  assert(mutex != NULL);
+
+  assert(pthread_mutex_lock(&mutex) == 0);
+
+  assert(pthread_mutex_unlock(&mutex) == 0);
+
+  assert(pthread_mutex_unlock(&mutex) == 0);
+
+  assert(pthread_mutex_destroy(&mutex) == 0);
+
+  assert(mutex == NULL);
+
+  return 0;
+}