1  /* Test atomic_exchange routines for existence and proper execution on
       2     2-byte values with each valid memory model.  */
       3  /* { dg-do run } */
       4  /* { dg-options "-std=c11 -pedantic-errors" } */
       5  
       6  #include <stdatomic.h>
       7  
       8  extern void abort (void);
       9  
      10  _Atomic short v;
      11  short count, ret;
      12  
      13  int
      14  main ()
      15  {
      16    v = 0;
      17    count = 0;
      18  
      19    if (atomic_exchange_explicit (&v, count + 1, memory_order_relaxed) != count)
      20      abort ();
      21    count++;
      22  
      23    if (atomic_exchange_explicit (&v, count + 1, memory_order_acquire) != count)
      24      abort ();
      25    count++;
      26  
      27    if (atomic_exchange_explicit (&v, count + 1, memory_order_release) != count)
      28      abort ();
      29    count++;
      30  
      31    if (atomic_exchange_explicit (&v, count + 1, memory_order_acq_rel) != count)
      32      abort ();
      33    count++;
      34  
      35    if (atomic_exchange_explicit (&v, count + 1, memory_order_seq_cst) != count)
      36      abort ();
      37    count++;
      38  
      39    count++;
      40  
      41    ret = atomic_exchange (&v, count);
      42    if (ret != count - 1 || v != count)
      43      abort ();
      44  
      45    return 0;
      46  }