kit

kit
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atomic_cas.c (351B)

      1 /* Atomic compare-exchange on a global: the ldaxr/stlxr CAS loop plus the
      2  * branch on success. Exit: g becomes 42. */
      3 _Atomic int g = 40;
      4 int test_main(void) {
      5   int expected = 40;
      6   __atomic_compare_exchange_n(&g, &expected, 42, 0, __ATOMIC_SEQ_CST,
      7                               __ATOMIC_SEQ_CST);
      8   return __atomic_load_n(&g, __ATOMIC_SEQ_CST);
      9 }