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 // UNSUPPORTED: c++98, c++03
12
13 // <future>
14
15 // class promise<R>
16
17 // template <class Allocator>
18 // promise(allocator_arg_t, const Allocator& a);
19
20 #include <future>
21 #include <cassert>
22
23 #include "test_allocator.h"
24 #include "min_allocator.h"
25
main()26 int main()
27 {
28 assert(test_alloc_base::alloc_count == 0);
29 {
30 std::promise<int> p(std::allocator_arg, test_allocator<int>(42));
31 assert(test_alloc_base::alloc_count == 1);
32 std::future<int> f = p.get_future();
33 assert(test_alloc_base::alloc_count == 1);
34 assert(f.valid());
35 }
36 assert(test_alloc_base::alloc_count == 0);
37 {
38 std::promise<int&> p(std::allocator_arg, test_allocator<int>(42));
39 assert(test_alloc_base::alloc_count == 1);
40 std::future<int&> f = p.get_future();
41 assert(test_alloc_base::alloc_count == 1);
42 assert(f.valid());
43 }
44 assert(test_alloc_base::alloc_count == 0);
45 {
46 std::promise<void> p(std::allocator_arg, test_allocator<void>(42));
47 assert(test_alloc_base::alloc_count == 1);
48 std::future<void> f = p.get_future();
49 assert(test_alloc_base::alloc_count == 1);
50 assert(f.valid());
51 }
52 assert(test_alloc_base::alloc_count == 0);
53 // Test with a minimal allocator
54 {
55 std::promise<int> p(std::allocator_arg, bare_allocator<void>());
56 std::future<int> f = p.get_future();
57 assert(f.valid());
58 }
59 {
60 std::promise<int&> p(std::allocator_arg, bare_allocator<void>());
61 std::future<int&> f = p.get_future();
62 assert(f.valid());
63 }
64 {
65 std::promise<void> p(std::allocator_arg, bare_allocator<void>());
66 std::future<void> f = p.get_future();
67 assert(f.valid());
68 }
69 // Test with a minimal allocator that returns class-type pointers
70 {
71 std::promise<int> p(std::allocator_arg, min_allocator<void>());
72 std::future<int> f = p.get_future();
73 assert(f.valid());
74 }
75 {
76 std::promise<int&> p(std::allocator_arg, min_allocator<void>());
77 std::future<int&> f = p.get_future();
78 assert(f.valid());
79 }
80 {
81 std::promise<void> p(std::allocator_arg, min_allocator<void>());
82 std::future<void> f = p.get_future();
83 assert(f.valid());
84 }
85 }
86