test/userprog.c

   1 #include <stdio.h>
   2 #include <threads.h>
   3 #include <stdatomic.h>
   4
   5 #include "librace.h"
   6
   7 atomic_int x;
   8 atomic_int y;
   9 int z;
  10
  11 static void a(void *obj)
  12 {
  13         int r1=atomic_load_explicit(&y, memory_order_relaxed);
  14         atomic_store_explicit(&x, r1, memory_order_relaxed);
  15 //      z = 1;
  16         printf("r1=%d\n",r1);
  17 }
  18
  19 static void b(void *obj)
  20 {
  21         int r2=atomic_load_explicit(&x, memory_order_relaxed);
  22         atomic_store_explicit(&y, 42, memory_order_relaxed);
  23 //      z = 2;
  24         printf("r2=%d\n",r2);
  25 }
  26
  27 int user_main(int argc, char **argv)
  28 {
  29         thrd_t t1, t2;
  30
  31         atomic_init(&x, 30);
  32         atomic_init(&y, 0);
  33
  34         printf("Main thread: creating 2 threads\n");
  35         thrd_create(&t1, (thrd_start_t)&a, NULL);
  36         thrd_create(&t2, (thrd_start_t)&b, NULL);
  37
  38         thrd_join(t1);
  39         thrd_join(t2);
  40         printf("Main thread is finished\n");
  41
  42         return 0;
  43 }