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 // XFAIL: libcpp-no-exceptions
11 // UNSUPPORTED: libcpp-has-no-threads
12 // UNSUPPORTED: c++98, c++03
13 
14 // <future>
15 
16 // class packaged_task<R(ArgTypes...)>
17 
18 // void operator()(ArgTypes... args);
19 
20 #include <future>
21 #include <cassert>
22 
23 class A
24 {
25     long data_;
26 
27 public:
28     explicit A(long i) : data_(i) {}
29 
30     long operator()(long i, long j) const
31     {
32         if (j == 'z')
33             throw A(6);
34         return data_ + i + j;
35     }
36 };
37 
38 void func0(std::packaged_task<double(int, char)> p)
39 {
40     std::this_thread::sleep_for(std::chrono::milliseconds(500));
41     p(3, 'a');
42 }
43 
44 void func1(std::packaged_task<double(int, char)> p)
45 {
46     std::this_thread::sleep_for(std::chrono::milliseconds(500));
47     p(3, 'z');
48 }
49 
50 void func2(std::packaged_task<double(int, char)> p)
51 {
52     p(3, 'a');
53     try
54     {
55         p(3, 'c');
56     }
57     catch (const std::future_error& e)
58     {
59         assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
60     }
61 }
62 
63 void func3(std::packaged_task<double(int, char)> p)
64 {
65     try
66     {
67         p(3, 'a');
68     }
69     catch (const std::future_error& e)
70     {
71         assert(e.code() == make_error_code(std::future_errc::no_state));
72     }
73 }
74 
75 int main()
76 {
77     {
78         std::packaged_task<double(int, char)> p(A(5));
79         std::future<double> f = p.get_future();
80         std::thread(func0, std::move(p)).detach();
81         assert(f.get() == 105.0);
82     }
83     {
84         std::packaged_task<double(int, char)> p(A(5));
85         std::future<double> f = p.get_future();
86         std::thread(func1, std::move(p)).detach();
87         try
88         {
89             f.get();
90             assert(false);
91         }
92         catch (const A& e)
93         {
94             assert(e(3, 'a') == 106);
95         }
96     }
97     {
98         std::packaged_task<double(int, char)> p(A(5));
99         std::future<double> f = p.get_future();
100         std::thread t(func2, std::move(p));
101         assert(f.get() == 105.0);
102         t.join();
103     }
104     {
105         std::packaged_task<double(int, char)> p;
106         std::thread t(func3, std::move(p));
107         t.join();
108     }
109 }
110