libgomp/testsuite/libgomp.c/parallel-1.c

   1 /* Trivial test of thread startup.  */
   2
   3 #include <omp.h>
   4 #include <string.h>
   5 #include <assert.h>
   6 #include "libgomp_g.h"
   7
   8
   9 static int nthr;
  10 static int saw[4];
  11
  12 static void function(void *dummy)
  13 {
  14   int iam = omp_get_thread_num ();
  15
  16   if (iam == 0)
  17     nthr = omp_get_num_threads ();
  18
  19   saw[iam] = 1;
  20 }
  21
  22 int main()
  23 {
  24   omp_set_dynamic (0);
  25
  26   GOMP_parallel_start (function, NULL, 2);
  27   function (NULL);
  28   GOMP_parallel_end ();
  29
  30   assert (nthr == 2);
  31   assert (saw[0] != 0);
  32   assert (saw[1] != 0);
  33   assert (saw[2] == 0);
  34
  35   memset (saw, 0, sizeof (saw));
  36
  37   GOMP_parallel_start (function, NULL, 3);
  38   function (NULL);
  39   GOMP_parallel_end ();
  40
  41   assert (nthr == 3);
  42   assert (saw[0] != 0);
  43   assert (saw[1] != 0);
  44   assert (saw[2] != 0);
  45   assert (saw[3] == 0);
  46
  47   return 0;
  48 }