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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 | // Copyright (C) 2011 Vicente J. Botet Escriba | |
10 | // | |
11 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
12 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
13 | ||
14 | // <boost/thread/condition_variable> | |
15 | ||
16 | // class condition_variable; | |
17 | ||
18 | // condition_variable(const condition_variable&) = delete; | |
19 | ||
20 | #include <boost/thread/condition_variable.hpp> | |
21 | #include <boost/thread/mutex.hpp> | |
22 | #include <boost/thread/thread.hpp> | |
23 | #include <boost/detail/lightweight_test.hpp> | |
24 | ||
25 | #if defined BOOST_THREAD_USES_CHRONO | |
26 | ||
27 | class Pred | |
28 | { | |
29 | int& i_; | |
30 | public: | |
31 | explicit Pred(int& i) : | |
32 | i_(i) | |
33 | { | |
34 | } | |
35 | ||
36 | bool operator()() | |
37 | { | |
38 | return i_ != 0; | |
39 | } | |
40 | }; | |
41 | ||
42 | boost::condition_variable cv; | |
43 | boost::mutex mut; | |
44 | ||
45 | int test1 = 0; | |
46 | int test2 = 0; | |
47 | ||
48 | int runs = 0; | |
49 | ||
50 | void f() | |
51 | { | |
52 | typedef boost::chrono::system_clock Clock; | |
53 | typedef boost::chrono::milliseconds milliseconds; | |
54 | boost::unique_lock < boost::mutex > lk(mut); | |
55 | BOOST_TEST(test2 == 0); | |
56 | test1 = 1; | |
57 | cv.notify_one(); | |
58 | Clock::time_point t0 = Clock::now(); | |
59 | int count=0; | |
60 | //bool r = | |
61 | (void)cv.wait_for(lk, milliseconds(250), Pred(test2)); | |
62 | count++; | |
63 | Clock::time_point t1 = Clock::now(); | |
64 | if (runs == 0) | |
65 | { | |
66 | // This test is spurious as it depends on the time the thread system switches the threads | |
67 | BOOST_TEST(t1 - t0 < milliseconds(250+1000)); | |
68 | BOOST_TEST(test2 != 0); | |
69 | } | |
70 | else | |
71 | { | |
72 | BOOST_TEST(t1 - t0 - milliseconds(250) < milliseconds(count*250+2)); | |
73 | BOOST_TEST(test2 == 0); | |
74 | } | |
75 | ++runs; | |
76 | } | |
77 | ||
78 | int main() | |
79 | { | |
80 | { | |
81 | boost::unique_lock < boost::mutex > lk(mut); | |
82 | boost::thread t(f); | |
83 | BOOST_TEST(test1 == 0); | |
84 | while (test1 == 0) | |
85 | cv.wait(lk); | |
86 | BOOST_TEST(test1 != 0); | |
87 | test2 = 1; | |
88 | lk.unlock(); | |
89 | cv.notify_one(); | |
90 | t.join(); | |
91 | } | |
92 | test1 = 0; | |
93 | test2 = 0; | |
94 | { | |
95 | boost::unique_lock < boost::mutex > lk(mut); | |
96 | boost::thread t(f); | |
97 | BOOST_TEST(test1 == 0); | |
98 | while (test1 == 0) | |
99 | cv.wait(lk); | |
100 | BOOST_TEST(test1 != 0); | |
101 | lk.unlock(); | |
102 | t.join(); | |
103 | } | |
104 | ||
105 | return boost::report_errors(); | |
106 | } | |
107 | ||
108 | #else | |
109 | #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported" | |
110 | #endif |