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
  10 static void a(void *obj)
  11 {
  12         int r1=atomic_load_explicit(&y, memory_order_relaxed);
  13         atomic_store_explicit(&x, r1, memory_order_relaxed);
  14         printf("r1=%d\n",r1);
  15 }
  16
  17 static void b(void *obj)
  18 {
  19         int r2=atomic_load_explicit(&x, memory_order_relaxed);
  20         atomic_store_explicit(&y, 42, memory_order_relaxed);
  21         printf("r2=%d\n",r2);
  22 }
  23
  24 int user_main(int argc, char **argv)
  25 {
  26         thrd_t t1, t2;
  27
  28         atomic_init(&x, 0);
  29         atomic_init(&y, 0);
  30
  31         printf("Main thread: creating 2 threads\n");
  32         thrd_create(&t1, (thrd_start_t)&a, NULL);
  33         thrd_create(&t2, (thrd_start_t)&b, NULL);
  34
  35         thrd_join(t1);
  36         thrd_join(t2);
  37         printf("Main thread is finished\n");
  38
  39         return 0;
  40 }