userprog.c

   1 #include <stdio.h>
   2
   3 #include "libthreads.h"
   4 #include "libatomic.h"
   5
   6 static void a(atomic_int *obj)
   7 {
   8         int i;
   9
  10         for (i = 0; i < 10; i++) {
  11                 printf("Thread %d, loop %d\n", thrd_current(), i);
  12                 switch (i % 4) {
  13                 case 1:
  14                         atomic_load(obj);
  15                         break;
  16                 case 3:
  17                         atomic_store(obj, i);
  18                         break;
  19                 }
  20         }
  21 }
  22
  23 void user_main()
  24 {
  25         thrd_t t1, t2;
  26         atomic_int obj;
  27
  28         printf("Creating 2 threads\n");
  29         thrd_create(&t1, (thrd_start_t)&a, &obj);
  30         thrd_create(&t2, (thrd_start_t)&a, &obj);
  31
  32         thrd_join(t1);
  33         thrd_join(t2);
  34         printf("Thread is finished\n");
  35 }