gcc/testsuite/gcc.dg/atomic/stdatomic-store-2.c

/* Test atomic_store routines for existence and proper execution on
   2-byte values with each valid memory model.  */
/* { dg-do run } */
/* { dg-options "-std=c11 -pedantic-errors" } */

#include <stdatomic.h>

extern void abort (void);

_Atomic short v;
short count;

int
main ()
{
  v = 0;
  count = 0;

  atomic_init (&v, count + 1);
  if (v != ++count)
    abort ();

  atomic_store_explicit (&v, count + 1, memory_order_relaxed);
  if (v != ++count)
    abort ();

  atomic_store_explicit (&v, count + 1, memory_order_release);
  if (v != ++count)
    abort ();

  atomic_store_explicit (&v, count + 1, memory_order_seq_cst);
  if (v != ++count)
    abort ();

  count++;

  atomic_store (&v, count);
  if (v != count)
    abort ();

  return 0;
}