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Vendor import of libc++ trunk r290819:
[FreeBSD/FreeBSD.git] / test / std / thread / futures / futures.task / futures.task.members / operator.pass.cpp
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 packaged_task<R(ArgTypes...)>
16
17 // void operator()(ArgTypes... args);
18
19 #include <future>
20 #include <cassert>
21
22 #include "test_macros.h"
23
24 class A
25 {
26     long data_;
27
28 public:
29     explicit A(long i) : data_(i) {}
30
31     long operator()(long i, long j) const
32     {
33         if (j == 'z')
34             TEST_THROW(A(6));
35         return data_ + i + j;
36     }
37 };
38
39 void func0(std::packaged_task<double(int, char)> p)
40 {
41     std::this_thread::sleep_for(std::chrono::milliseconds(500));
42     p(3, 'a');
43 }
44
45 void func1(std::packaged_task<double(int, char)> p)
46 {
47     std::this_thread::sleep_for(std::chrono::milliseconds(500));
48     p(3, 'z');
49 }
50
51 void func2(std::packaged_task<double(int, char)> p)
52 {
53 #ifndef TEST_HAS_NO_EXCEPTIONS
54     p(3, 'a');
55     try
56     {
57         p(3, 'c');
58     }
59     catch (const std::future_error& e)
60     {
61         assert(e.code() == make_error_code(std::future_errc::promise_already_satisfied));
62     }
63 #else
64     ((void)p);
65 #endif
66 }
67
68 void func3(std::packaged_task<double(int, char)> p)
69 {
70 #ifndef TEST_HAS_NO_EXCEPTIONS
71     try
72     {
73         p(3, 'a');
74     }
75     catch (const std::future_error& e)
76     {
77         assert(e.code() == make_error_code(std::future_errc::no_state));
78     }
79 #else
80     ((void)p);
81 #endif
82 }
83
84 int main()
85 {
86     {
87         std::packaged_task<double(int, char)> p(A(5));
88         std::future<double> f = p.get_future();
89         std::thread(func0, std::move(p)).detach();
90         assert(f.get() == 105.0);
91     }
92 #ifndef TEST_HAS_NO_EXCEPTIONS
93     {
94         std::packaged_task<double(int, char)> p(A(5));
95         std::future<double> f = p.get_future();
96         std::thread(func1, std::move(p)).detach();
97         try
98         {
99             f.get();
100             assert(false);
101         }
102         catch (const A& e)
103         {
104             assert(e(3, 'a') == 106);
105         }
106     }
107     {
108         std::packaged_task<double(int, char)> p(A(5));
109         std::future<double> f = p.get_future();
110         std::thread t(func2, std::move(p));
111         assert(f.get() == 105.0);
112         t.join();
113     }
114     {
115         std::packaged_task<double(int, char)> p;
116         std::thread t(func3, std::move(p));
117         t.join();
118     }
119 #endif
120 }