test/sctest.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 atomic_int z;
  10
  11 static int r1, r2, r3;
  12
  13 static void a(void *obj)
  14 {
  15         atomic_store_explicit(&z, 1, memory_order_relaxed);
  16 }
  17
  18 static void b(void *obj)
  19 {
  20         atomic_store_explicit(&x, 1, memory_order_relaxed);
  21         atomic_store_explicit(&y, 1, memory_order_relaxed);
  22         r1=atomic_load_explicit(&z, memory_order_relaxed);
  23 }
  24 static void c(void *obj)
  25 {
  26         atomic_store_explicit(&z, 2, memory_order_relaxed);
  27         atomic_store_explicit(&x, 2, memory_order_relaxed);
  28         r2=atomic_load_explicit(&y, memory_order_relaxed);
  29 }
  30
  31 static void d(void *obj)
  32 {
  33         atomic_store_explicit(&z, 3, memory_order_relaxed);
  34         atomic_store_explicit(&y, 2, memory_order_relaxed);
  35         r3=atomic_load_explicit(&x, memory_order_relaxed);
  36 }
  37
  38 int user_main(int argc, char **argv)
  39 {
  40         thrd_t t1, t2,t3, t4;
  41
  42         atomic_init(&x, 0);
  43         atomic_init(&y, 0);
  44         atomic_init(&z, 0);
  45
  46         thrd_create(&t1, (thrd_start_t)&a, NULL);
  47         thrd_create(&t2, (thrd_start_t)&b, NULL);
  48         thrd_create(&t3, (thrd_start_t)&c, NULL);
  49         thrd_create(&t4, (thrd_start_t)&d, NULL);
  50
  51         thrd_join(t1);
  52         thrd_join(t2);
  53         thrd_join(t3);
  54         thrd_join(t4);
  55
  56         /* Check and/or print r1, r2, r3? */
  57
  58         return 0;
  59 }