--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgomp/testsuite/libgomp.c/appendix-a/a.40.1.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,48 @@
+/* { dg-do compile } */
+
+#include <omp.h>
+typedef struct
+{
+  int a, b;
+  omp_nest_lock_t lck;
+} pair;
+int work1 ();
+int work2 ();
+int work3 ();
+void
+incr_a (pair * p, int a)
+{
+  /* Called only from incr_pair, no need to lock. */
+  p->a += a;
+}
+
+void
+incr_b (pair * p, int b)
+{
+  /* Called both from incr_pair and elsewhere, */
+  /* so need a nestable lock. */
+  omp_set_nest_lock (&p->lck);
+  p->b += b;
+  omp_unset_nest_lock (&p->lck);
+}
+
+void
+incr_pair (pair * p, int a, int b)
+{
+  omp_set_nest_lock (&p->lck);
+  incr_a (p, a);
+  incr_b (p, b);
+  omp_unset_nest_lock (&p->lck);
+}
+
+void
+a40 (pair * p)
+{
+#pragma omp parallel sections
+  {
+#pragma omp section
+    incr_pair (p, work1 (), work2 ());
+#pragma omp section
+    incr_b (p, work3 ());
+  }
+}