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1 | // Copyright (C) 2014 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_PROVIDES_EXECUTORS | |
15 | //#define BOOST_THREAD_USES_LOG | |
16 | #define BOOST_THREAD_USES_LOG_THREAD_ID | |
17 | #include <boost/thread/detail/log.hpp> | |
18 | ||
19 | #include <boost/thread/future.hpp> | |
20 | #include <boost/thread/executors/basic_thread_pool.hpp> | |
21 | #include <boost/thread/executor.hpp> | |
22 | #include <boost/detail/lightweight_test.hpp> | |
23 | #include <cassert> | |
24 | ||
25 | #if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION | |
26 | ||
27 | #ifdef BOOST_MSVC | |
28 | #pragma warning(disable: 4127) // conditional expression is constant | |
29 | #endif | |
30 | ||
31 | int p1() | |
32 | { | |
33 | BOOST_THREAD_LOG << "p1 < " << BOOST_THREAD_END_LOG; | |
34 | boost::this_thread::sleep_for(boost::chrono::milliseconds(500)); | |
35 | BOOST_THREAD_LOG << "p1 >" << BOOST_THREAD_END_LOG; | |
36 | return 1; | |
37 | } | |
38 | ||
39 | int p2(boost::future<int> f) | |
40 | { | |
41 | assert(f.is_ready()); | |
42 | BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG; | |
43 | BOOST_TEST(f.valid()); | |
44 | int i = f.get(); | |
45 | boost::this_thread::sleep_for(boost::chrono::milliseconds(500)); | |
46 | BOOST_THREAD_LOG << "p2 <" << &f << BOOST_THREAD_END_LOG; | |
47 | return 2 * i; | |
48 | } | |
49 | ||
50 | void p3(boost::future<int> f) | |
51 | { | |
52 | assert(f.is_ready()); | |
53 | BOOST_THREAD_LOG << "p3 <" << &f << BOOST_THREAD_END_LOG; | |
54 | BOOST_TEST(f.valid()); | |
55 | int i = f.get(); | |
56 | boost::this_thread::sleep_for(boost::chrono::milliseconds(500)); | |
57 | BOOST_THREAD_LOG << "p3 <" << &f << " " <<i << BOOST_THREAD_END_LOG; | |
58 | return; | |
59 | } | |
60 | ||
61 | int main() | |
62 | { | |
63 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
64 | { | |
65 | boost::basic_thread_pool ex(1); | |
66 | boost::future<int> f1 = boost::async(boost::launch::async, &p1); | |
67 | BOOST_TEST(f1.valid()); | |
68 | boost::future<int> f2 = f1.then(ex, &p2); | |
69 | BOOST_TEST(f2.valid()); | |
70 | BOOST_TEST(! f1.valid()); | |
71 | try | |
72 | { | |
73 | BOOST_TEST(f2.get()==2); | |
74 | } | |
75 | catch (std::exception& ex) | |
76 | { | |
77 | BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG; | |
78 | BOOST_TEST(false); | |
79 | } | |
80 | catch (...) | |
81 | { | |
82 | BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG; | |
83 | BOOST_TEST(false); | |
84 | } | |
85 | } | |
86 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
87 | { | |
88 | boost::basic_thread_pool ex(1); | |
89 | boost::future<int> f1 = boost::async(boost::launch::async, &p1); | |
90 | BOOST_TEST(f1.valid()); | |
91 | boost::future<void> f2 = f1.then(ex, &p3); | |
92 | BOOST_TEST(f2.valid()); | |
93 | try | |
94 | { | |
95 | f2.wait(); | |
96 | } | |
97 | catch (std::exception& ex) | |
98 | { | |
99 | BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG; | |
100 | BOOST_TEST(false); | |
101 | } | |
102 | catch (...) | |
103 | { | |
104 | BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG; | |
105 | BOOST_TEST(false); | |
106 | } | |
107 | } | |
108 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
109 | { | |
110 | boost::basic_thread_pool ex(1); | |
111 | boost::future<int> f2 = boost::async(p1).then(ex, &p2); | |
112 | BOOST_TEST(f2.get()==2); | |
113 | } | |
114 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
115 | { | |
116 | boost::basic_thread_pool ex(1); | |
117 | boost::future<int> f1 = boost::async(p1); | |
118 | boost::future<int> f21 = f1.then(ex, &p2); | |
119 | boost::future<int> f2= f21.then(ex, &p2); | |
120 | BOOST_TEST(f2.get()==4); | |
121 | } | |
122 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
123 | { | |
124 | boost::basic_thread_pool ex(1); | |
125 | boost::future<int> f1 = boost::async(p1); | |
126 | boost::future<int> f21 = f1.then(ex, &p2); | |
127 | boost::future<int> f2= f21.then(&p2); | |
128 | BOOST_TEST(f2.get()==4); | |
129 | } | |
130 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
131 | { | |
132 | boost::basic_thread_pool ex(1); | |
133 | boost::future<int> f1 = boost::async(p1); | |
134 | boost::future<int> f2= f1.then(&p2).then(ex, &p2); | |
135 | BOOST_TEST(f2.get()==4); | |
136 | } | |
137 | BOOST_THREAD_LOG << BOOST_THREAD_END_LOG; | |
138 | { | |
139 | boost::basic_thread_pool ex(1); | |
140 | boost::future<int> f2 = boost::async(p1).then(ex, &p2).then(ex, &p2); | |
141 | BOOST_TEST(f2.get()==4); | |
142 | } | |
143 | ||
144 | return boost::report_errors(); | |
145 | } | |
146 | ||
147 | #else | |
148 | ||
149 | int main() | |
150 | { | |
151 | return 0; | |
152 | } | |
153 | #endif |