1  /* Test atomic_flag routines for existence and execution.  */
       2  /* The test needs a lockless atomic implementation.  */
       3  /* { dg-do run { xfail hppa*-*-hpux* } } */
       4  /* { dg-options "-std=c11 -pedantic-errors" } */
       5  
       6  #include <stdatomic.h>
       7  
       8  extern void abort (void);
       9  atomic_flag a = ATOMIC_FLAG_INIT;
      10  
      11  int
      12  main ()
      13  {
      14    int b;
      15  
      16    if (!atomic_is_lock_free (&a))
      17      abort ();
      18  
      19    if (atomic_flag_test_and_set (&a))
      20      abort ();
      21    atomic_flag_clear_explicit (&a, memory_order_relaxed);
      22    if (atomic_flag_test_and_set (&a))
      23      abort ();
      24    atomic_flag_clear (&a);
      25  
      26    b = atomic_flag_test_and_set_explicit (&a, memory_order_seq_cst);
      27    if (!atomic_flag_test_and_set (&a) || b != 0)
      28      abort ();
      29  
      30    b = atomic_flag_test_and_set_explicit (&a, memory_order_acq_rel);
      31    if (!atomic_flag_test_and_set (&a) || b != 1)
      32      abort ();
      33  
      34    atomic_flag_clear_explicit (&a, memory_order_seq_cst);
      35    if (atomic_flag_test_and_set (&a))
      36      abort ();
      37  
      38    return 0;
      39  }