libgomp/testsuite/libgomp.c/critical-1.c

   1 /* Trivial test of critical sections.  */
   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 volatile int test = -1;
  13
  14 static void function(void *dummy)
  15 {
  16   int iam = omp_get_thread_num ();
  17   int old;
  18
  19   GOMP_critical_start ();
  20
  21   old = __sync_lock_test_and_set (&test, iam);
  22   assert (old == -1);
  23
  24   usleep (10);
  25   test = -1;
  26
  27   GOMP_critical_end ();
  28 }
  29
  30 int main()
  31 {
  32   omp_set_dynamic (0);
  33
  34   GOMP_parallel_start (function, NULL, 3);
  35   function (NULL);
  36   GOMP_parallel_end ();
  37
  38   return 0;
  39 }