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 // <atomic>
11 
12 // template <class T>
13 //     T
14 //     atomic_load(const volatile atomic<T>* obj);
15 //
16 // template <class T>
17 //     T
18 //     atomic_load(const atomic<T>* obj);
19 
20 #include <atomic>
21 #include <type_traits>
22 #include <cassert>
23 
24 template <class T>
25 void
test()26 test()
27 {
28     typedef std::atomic<T> A;
29     A t;
30     std::atomic_init(&t, T(1));
31     assert(std::atomic_load(&t) == T(1));
32     volatile A vt;
33     std::atomic_init(&vt, T(2));
34     assert(std::atomic_load(&vt) == T(2));
35 }
36 
37 struct A
38 {
39     int i;
40 
AA41     explicit A(int d = 0) : i(d) {}
42 
operator ==(const A & x,const A & y)43     friend bool operator==(const A& x, const A& y)
44         {return x.i == y.i;}
45 };
46 
main()47 int main()
48 {
49     test<A>();
50     test<char>();
51     test<signed char>();
52     test<unsigned char>();
53     test<short>();
54     test<unsigned short>();
55     test<int>();
56     test<unsigned int>();
57     test<long>();
58     test<unsigned long>();
59     test<long long>();
60     test<unsigned long long>();
61     test<wchar_t>();
62 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
63     test<char16_t>();
64     test<char32_t>();
65 #endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
66     test<int*>();
67     test<const int*>();
68 }
69