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 // <future>
13 
14 // class shared_future<R>
15 
16 // ~shared_future();
17 
18 #include <future>
19 #include <cassert>
20 
21 #include "../test_allocator.h"
22 
main()23 int main()
24 {
25     assert(test_alloc_base::count == 0);
26     {
27         typedef int T;
28         std::shared_future<T> f;
29         {
30             std::promise<T> p(std::allocator_arg, test_allocator<T>());
31             assert(test_alloc_base::count == 1);
32             f = p.get_future();
33             assert(test_alloc_base::count == 1);
34             assert(f.valid());
35         }
36         assert(test_alloc_base::count == 1);
37         assert(f.valid());
38     }
39     assert(test_alloc_base::count == 0);
40     {
41         typedef int& T;
42         std::shared_future<T> f;
43         {
44             std::promise<T> p(std::allocator_arg, test_allocator<int>());
45             assert(test_alloc_base::count == 1);
46             f = p.get_future();
47             assert(test_alloc_base::count == 1);
48             assert(f.valid());
49         }
50         assert(test_alloc_base::count == 1);
51         assert(f.valid());
52     }
53     assert(test_alloc_base::count == 0);
54     {
55         typedef void T;
56         std::shared_future<T> f;
57         {
58             std::promise<T> p(std::allocator_arg, test_allocator<T>());
59             assert(test_alloc_base::count == 1);
60             f = p.get_future();
61             assert(test_alloc_base::count == 1);
62             assert(f.valid());
63         }
64         assert(test_alloc_base::count == 1);
65         assert(f.valid());
66     }
67     assert(test_alloc_base::count == 0);
68 }
69