1 /* Test atomic_exchange routines for existence and proper execution on
2 1-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 char v;
11 char count, ret;
12
13 int
main()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 }
47