libgomp/testsuite/libgomp.c/single-1.c

   1 /* Trivial test of single.  */
   2
   3 /* { dg-require-effective-target sync_int_long } */
   4
   5 #include <omp.h>
   6 #include <sys/time.h>
   7 #include <unistd.h>
   8 #include <assert.h>
   9 #include "libgomp_g.h"
  10
  11
  12 static int test;
  13
  14 static void f_nocopy (void *dummy)
  15 {
  16   if (GOMP_single_start ())
  17     {
  18       int iam = omp_get_thread_num ();
  19       int old = __sync_lock_test_and_set (&test, iam);
  20       assert (old == -1);
  21     }
  22 }
  23
  24 static void f_copy (void *dummy)
  25 {
  26   int *x = GOMP_single_copy_start ();
  27   if (x == NULL)
  28     {
  29       int iam = omp_get_thread_num ();
  30       int old = __sync_lock_test_and_set (&test, iam);
  31       assert (old == -1);
  32       GOMP_single_copy_end (&test);
  33     }
  34   else
  35     assert (x == &test);
  36 }
  37
  38 int main()
  39 {
  40   omp_set_dynamic (0);
  41
  42   test = -1;
  43   GOMP_parallel_start (f_nocopy, NULL, 3);
  44   f_nocopy (NULL);
  45   GOMP_parallel_end ();
  46
  47   test = -1;
  48   GOMP_parallel_start (f_copy, NULL, 3);
  49   f_copy (NULL);
  50   GOMP_parallel_end ();
  51
  52   return 0;
  53 }