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 // This test uses new symbols that were not defined in the libc++ shipped on
13 // darwin11 and darwin12:
14 // XFAIL: availability=macosx10.7
15 // XFAIL: availability=macosx10.8
16
17 // <memory>
18
19 // shared_ptr
20
21 // template <class T>
22 // shared_ptr<T>
23 // atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r)
24
25 // UNSUPPORTED: c++98, c++03
26
27 #include <memory>
28 #include <cassert>
29
30 #include "test_macros.h"
31
main()32 int main()
33 {
34 {
35 std::shared_ptr<int> p(new int(4));
36 std::shared_ptr<int> r(new int(3));
37 r = std::atomic_exchange(&p, r);
38 assert(*p == 3);
39 assert(*r == 4);
40 }
41 }
42