1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // UNSUPPORTED: libcpp-has-no-threads
10 
11 // <atomic>
12 
13 // typedef enum memory_order
14 // {
15 //     memory_order_relaxed, memory_order_consume, memory_order_acquire,
16 //     memory_order_release, memory_order_acq_rel, memory_order_seq_cst
17 // } memory_order;
18 
19 #include <atomic>
20 #include <cassert>
21 
22 int main(int, char**)
23 {
24     assert(static_cast<int>(std::memory_order_relaxed) == 0);
25     assert(static_cast<int>(std::memory_order_consume) == 1);
26     assert(static_cast<int>(std::memory_order_acquire) == 2);
27     assert(static_cast<int>(std::memory_order_release) == 3);
28     assert(static_cast<int>(std::memory_order_acq_rel) == 4);
29     assert(static_cast<int>(std::memory_order_seq_cst) == 5);
30 
31     std::memory_order o = std::memory_order_seq_cst;
32     assert(static_cast<int>(o) == 5);
33 
34     return 0;
35 }
36