1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // UNSUPPORTED: libcpp-has-no-threads
11 
12 // <atomic>
13 
14 // template <class T>
15 //     bool
16 //     atomic_is_lock_free(const volatile atomic<T>* obj);
17 //
18 // template <class T>
19 //     bool
20 //     atomic_is_lock_free(const atomic<T>* obj);
21 
22 #include <atomic>
23 #include <cassert>
24 
25 #include "atomic_helpers.h"
26 
27 template <class T>
28 struct TestFn {
operator ()TestFn29   void operator()() const {
30     typedef std::atomic<T> A;
31     A t;
32     bool b1 = std::atomic_is_lock_free(static_cast<const A*>(&t));
33     volatile A vt;
34     bool b2 = std::atomic_is_lock_free(static_cast<const volatile A*>(&vt));
35     assert(b1 == b2);
36   }
37 };
38 
39 struct A
40 {
41     char _[4];
42 };
43 
main()44 int main()
45 {
46     TestFn<A>()();
47     TestEachAtomicType<TestFn>()();
48 }
49