--- /dev/null
+/* Trivial test of single. */
+
+/* { dg-require-effective-target sync_int_long } */
+
+#include <omp.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <assert.h>
+#include "libgomp_g.h"
+
+
+static int test;
+
+static void f_nocopy (void *dummy)
+{
+ if (GOMP_single_start ())
+ {
+ int iam = omp_get_thread_num ();
+ int old = __sync_lock_test_and_set (&test, iam);
+ assert (old == -1);
+ }
+}
+
+static void f_copy (void *dummy)
+{
+ int *x = GOMP_single_copy_start ();
+ if (x == NULL)
+ {
+ int iam = omp_get_thread_num ();
+ int old = __sync_lock_test_and_set (&test, iam);
+ assert (old == -1);
+ GOMP_single_copy_end (&test);
+ }
+ else
+ assert (x == &test);
+}
+
+int main()
+{
+ omp_set_dynamic (0);
+
+ test = -1;
+ GOMP_parallel_start (f_nocopy, NULL, 3);
+ f_nocopy (NULL);
+ GOMP_parallel_end ();
+
+ test = -1;
+ GOMP_parallel_start (f_copy, NULL, 3);
+ f_copy (NULL);
+ GOMP_parallel_end ();
+
+ return 0;
+}