test/litmus/iriw.cc

   1 #include <stdio.h>
   2 #include <threads.h>
   3 #include <atomic>
   4
   5 std::atomic_int x;
   6 std::atomic_int y;
   7
   8 static void a(void *obj)
   9 {
  10         x.store(1, std::memory_order_release);
  11 }
  12
  13 static void b(void *obj)
  14 {
  15         y.store(1, std::memory_order_release);
  16 }
  17
  18 static void c(void *obj)
  19 {
  20         printf("x1: %d\n", x.load(std::memory_order_relaxed));
  21         printf("y1: %d\n", y.load(std::memory_order_relaxed));
  22 }
  23
  24 static void d(void *obj)
  25 {
  26         printf("y2: %d\n", y.load(std::memory_order_relaxed));
  27         printf("x2: %d\n", x.load(std::memory_order_relaxed));
  28 }
  29
  30 int user_main(int argc, char **argv)
  31 {
  32         thrd_t t1, t2, t3, t4;
  33
  34         atomic_init(&x, 0);
  35         atomic_init(&y, 0);
  36
  37         printf("Main thread: creating 4 threads\n");
  38         thrd_create(&t1, (thrd_start_t)&a, NULL);
  39         thrd_create(&t2, (thrd_start_t)&b, NULL);
  40         thrd_create(&t3, (thrd_start_t)&c, NULL);
  41         thrd_create(&t4, (thrd_start_t)&d, NULL);
  42
  43         thrd_join(t1);
  44         thrd_join(t2);
  45         thrd_join(t3);
  46         thrd_join(t4);
  47         printf("Main thread is finished\n");
  48
  49         return 0;
  50 }