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 promise<R>
15
16 // template <class Allocator>
17 // promise(allocator_arg_t, const Allocator& a);
18
19 #include <future>
20 #include <cassert>
21
22 #include "../test_allocator.h"
23 #include "min_allocator.h"
24
main()25 int main()
26 {
27 assert(test_alloc_base::count == 0);
28 {
29 std::promise<int> p(std::allocator_arg, test_allocator<int>());
30 assert(test_alloc_base::count == 1);
31 std::future<int> f = p.get_future();
32 assert(test_alloc_base::count == 1);
33 assert(f.valid());
34 }
35 assert(test_alloc_base::count == 0);
36 {
37 std::promise<int&> p(std::allocator_arg, test_allocator<int>());
38 assert(test_alloc_base::count == 1);
39 std::future<int&> f = p.get_future();
40 assert(test_alloc_base::count == 1);
41 assert(f.valid());
42 }
43 assert(test_alloc_base::count == 0);
44 {
45 std::promise<void> p(std::allocator_arg, test_allocator<void>());
46 assert(test_alloc_base::count == 1);
47 std::future<void> f = p.get_future();
48 assert(test_alloc_base::count == 1);
49 assert(f.valid());
50 }
51 assert(test_alloc_base::count == 0);
52 // Test with a minimal allocator
53 {
54 std::promise<int> p(std::allocator_arg, bare_allocator<void>());
55 std::future<int> f = p.get_future();
56 assert(f.valid());
57 }
58 {
59 std::promise<int&> p(std::allocator_arg, bare_allocator<void>());
60 std::future<int&> f = p.get_future();
61 assert(f.valid());
62 }
63 {
64 std::promise<void> p(std::allocator_arg, bare_allocator<void>());
65 std::future<void> f = p.get_future();
66 assert(f.valid());
67 }
68 // Test with a minimal allocator that returns class-type pointers
69 {
70 std::promise<int> p(std::allocator_arg, min_allocator<void>());
71 std::future<int> f = p.get_future();
72 assert(f.valid());
73 }
74 {
75 std::promise<int&> p(std::allocator_arg, min_allocator<void>());
76 std::future<int&> f = p.get_future();
77 assert(f.valid());
78 }
79 {
80 std::promise<void> p(std::allocator_arg, min_allocator<void>());
81 std::future<void> f = p.get_future();
82 assert(f.valid());
83 }
84 }
85