libgomp/testsuite/libgomp.c/barrier-1.c

   1 /* Trivial test of barrier.  */
   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 struct timeval stamps[3][3];
  11
  12 static void function(void *dummy)
  13 {
  14   int iam = omp_get_thread_num ();
  15
  16   gettimeofday (&stamps[iam][0], NULL);
  17   if (iam == 0)
  18     usleep (10);
  19
  20   GOMP_barrier ();
  21
  22   if (iam == 0)
  23     {
  24       gettimeofday (&stamps[0][1], NULL);
  25       usleep (10);
  26     }
  27
  28   GOMP_barrier ();
  29
  30   gettimeofday (&stamps[iam][2], NULL);
  31 }
  32
  33 int main()
  34 {
  35   omp_set_dynamic (0);
  36
  37   GOMP_parallel_start (function, NULL, 3);
  38   function (NULL);
  39   GOMP_parallel_end ();
  40
  41   assert (timercmp (&stamps[0][0], &stamps[0][1], <));
  42   assert (timercmp (&stamps[1][0], &stamps[0][1], <));
  43   assert (timercmp (&stamps[2][0], &stamps[0][1], <));
  44
  45   assert (timercmp (&stamps[0][1], &stamps[0][2], <));
  46   assert (timercmp (&stamps[0][1], &stamps[1][2], <));
  47   assert (timercmp (&stamps[0][1], &stamps[2][2], <));
  48
  49   return 0;
  50 }