| /* Test atomic_exchange routines for existence and proper execution on |
| 4-byte values with each valid memory model. */ |
| /* { dg-do run } */ |
| /* { dg-options "-std=c11 -pedantic-errors" } */ |
| |
| #include <stdatomic.h> |
| |
| extern void abort (void); |
| |
| _Atomic int v; |
| int count, ret; |
| |
| int |
| main () |
| { |
| v = 0; |
| count = 0; |
| |
| if (atomic_exchange_explicit (&v, count + 1, memory_order_relaxed) != count) |
| abort (); |
| count++; |
| |
| if (atomic_exchange_explicit (&v, count + 1, memory_order_acquire) != count) |
| abort (); |
| count++; |
| |
| if (atomic_exchange_explicit (&v, count + 1, memory_order_release) != count) |
| abort (); |
| count++; |
| |
| if (atomic_exchange_explicit (&v, count + 1, memory_order_acq_rel) != count) |
| abort (); |
| count++; |
| |
| if (atomic_exchange_explicit (&v, count + 1, memory_order_seq_cst) != count) |
| abort (); |
| count++; |
| |
| count++; |
| |
| ret = atomic_exchange (&v, count); |
| if (ret != count - 1 || v != count) |
| abort (); |
| |
| return 0; |
| } |