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

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