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1 | // Copyright (C) 2012-2013 Vicente Botet | |
2 | // | |
3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | // <boost/thread/future.hpp> | |
7 | ||
8 | // class future<R> | |
9 | ||
10 | // template<typename F> | |
11 | // auto then(F&& func) -> future<decltype(func(*this))>; | |
12 | ||
13 | #define BOOST_THREAD_VERSION 4 | |
14 | //#define BOOST_THREAD_USES_LOG | |
15 | #define BOOST_THREAD_USES_LOG_THREAD_ID | |
16 | #include <boost/thread/detail/log.hpp> | |
17 | ||
18 | #include <boost/thread/future.hpp> | |
19 | #include <boost/detail/lightweight_test.hpp> | |
20 | #include <cassert> | |
21 | ||
22 | #if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION | |
23 | ||
24 | #ifdef BOOST_MSVC | |
25 | #pragma warning(disable: 4127) // conditional expression is constant | |
26 | #endif | |
27 | ||
28 | int p1() | |
29 | { | |
30 | BOOST_THREAD_LOG << "p1 < " << BOOST_THREAD_END_LOG; | |
31 | boost::this_thread::sleep_for(boost::chrono::milliseconds(500)); | |
32 | BOOST_THREAD_LOG << "p1 >" << BOOST_THREAD_END_LOG; | |
33 | return 1; | |
34 | } | |
35 | ||
36 | int p2(boost::future<int> f) | |
37 | { | |
38 | assert(f.is_ready()); | |
39 | ||
40 | BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG; | |
41 | BOOST_TEST(f.valid()); | |
42 | int i = f.get(); | |
43 | boost::this_thread::sleep_for(boost::chrono::milliseconds(500)); | |
44 | BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG; | |
45 | return 2 * i; | |
46 | } | |
47 | ||
48 | void p3(boost::future<int> f) | |
49 | { | |
50 | assert(f.is_ready()); | |
51 | BOOST_THREAD_LOG << "p3 <" << &f << BOOST_THREAD_END_LOG; | |
52 | BOOST_TEST(f.valid()); | |
53 | int i = f.get(); | |
54 | boost::this_thread::sleep_for(boost::chrono::milliseconds(500)); | |
55 | BOOST_THREAD_LOG << "p3 <" << &f << " " <<i << BOOST_THREAD_END_LOG; | |
56 | return; | |
57 | } | |
58 | ||
59 | int main() | |
60 | { | |
61 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
62 | { | |
63 | boost::future<int> f1 = boost::async(boost::launch::async, &p1); | |
64 | BOOST_TEST(f1.valid()); | |
65 | boost::future<int> f2 = f1.then(boost::launch::deferred, &p2); | |
66 | BOOST_TEST(f2.valid()); | |
67 | BOOST_TEST(! f1.valid()); | |
68 | try | |
69 | { | |
70 | BOOST_TEST(f2.get()==2); | |
71 | } | |
72 | catch (std::exception& ex) | |
73 | { | |
74 | BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG; | |
75 | BOOST_TEST(false); | |
76 | } | |
77 | catch (...) | |
78 | { | |
79 | BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG; | |
80 | BOOST_TEST(false); | |
81 | } | |
82 | } | |
83 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
84 | { | |
85 | boost::future<int> f1 = boost::async(boost::launch::async, &p1); | |
86 | BOOST_TEST(f1.valid()); | |
87 | boost::future<void> f2 = f1.then(boost::launch::deferred, &p3); | |
88 | BOOST_TEST(f2.valid()); | |
89 | try | |
90 | { | |
91 | f2.wait(); | |
92 | } | |
93 | catch (std::exception& ex) | |
94 | { | |
95 | BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG; | |
96 | BOOST_TEST(false); | |
97 | } | |
98 | catch (...) | |
99 | { | |
100 | BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG; | |
101 | BOOST_TEST(false); | |
102 | } | |
103 | } | |
104 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
105 | { | |
106 | boost::future<int> f2 = boost::async(p1).then(boost::launch::deferred, &p2); | |
107 | BOOST_TEST(f2.get()==2); | |
108 | } | |
109 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
110 | { | |
111 | boost::future<int> f1 = boost::async(p1); | |
112 | boost::future<int> f21 = f1.then(boost::launch::deferred, &p2); | |
113 | boost::future<int> f2= f21.then(boost::launch::deferred, &p2); | |
114 | BOOST_TEST(f2.get()==4); | |
115 | } | |
116 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
117 | { | |
118 | boost::future<int> f1 = boost::async(p1); | |
119 | boost::future<int> f2= f1.then(boost::launch::deferred, &p2).then(boost::launch::deferred, &p2); | |
120 | BOOST_TEST(f2.get()==4); | |
121 | } | |
122 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
123 | { | |
124 | boost::future<int> f2 = boost::async(p1).then(boost::launch::deferred, &p2).then(boost::launch::deferred, &p2); | |
125 | BOOST_TEST(f2.get()==4); | |
126 | } | |
127 | ||
128 | return boost::report_errors(); | |
129 | } | |
130 | ||
131 | #else | |
132 | ||
133 | int main() | |
134 | { | |
135 | return 0; | |
136 | } | |
137 | #endif |