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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 | ||
10 | // Copyright (C) 2011 Vicente J. Botet Escriba | |
11 | // | |
12 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
13 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
14 | ||
15 | // <boost/thread/locks.hpp> | |
16 | ||
17 | // template <class Mutex> class unique_lock; | |
18 | ||
19 | // unique_lock(mutex_type& m, try_to_lock_t); | |
20 | ||
21 | ||
22 | #include <boost/thread/lock_types.hpp> | |
23 | #include <boost/thread/mutex.hpp> | |
24 | #include <boost/thread/thread.hpp> | |
25 | #include <boost/detail/lightweight_test.hpp> | |
26 | ||
27 | ||
28 | boost::mutex m; | |
29 | ||
30 | #if defined BOOST_THREAD_USES_CHRONO | |
31 | typedef boost::chrono::system_clock Clock; | |
32 | typedef Clock::time_point time_point; | |
33 | typedef Clock::duration duration; | |
34 | typedef boost::chrono::milliseconds ms; | |
35 | typedef boost::chrono::nanoseconds ns; | |
36 | #else | |
37 | #endif | |
38 | ||
39 | void f() | |
40 | { | |
41 | #if defined BOOST_THREAD_USES_CHRONO | |
42 | time_point t0 = Clock::now(); | |
43 | { | |
44 | boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
45 | BOOST_TEST(lk.owns_lock() == false); | |
46 | } | |
47 | { | |
48 | boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
49 | BOOST_TEST(lk.owns_lock() == false); | |
50 | } | |
51 | { | |
52 | boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
53 | BOOST_TEST(lk.owns_lock() == false); | |
54 | } | |
55 | while (true) | |
56 | { | |
57 | boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
58 | if (lk.owns_lock()) break; | |
59 | } | |
60 | time_point t1 = Clock::now(); | |
61 | //m.unlock(); | |
62 | ns d = t1 - t0 - ms(250); | |
63 | // This test is spurious as it depends on the time the thread system switches the threads | |
64 | BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms | |
65 | #else | |
66 | // time_point t0 = Clock::now(); | |
67 | // { | |
68 | // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
69 | // BOOST_TEST(lk.owns_lock() == false); | |
70 | // } | |
71 | // { | |
72 | // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
73 | // BOOST_TEST(lk.owns_lock() == false); | |
74 | // } | |
75 | // { | |
76 | // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
77 | // BOOST_TEST(lk.owns_lock() == false); | |
78 | // } | |
79 | while (true) | |
80 | { | |
81 | boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock); | |
82 | if (lk.owns_lock()) break; | |
83 | } | |
84 | //time_point t1 = Clock::now(); | |
85 | //ns d = t1 - t0 - ms(250); | |
86 | // This test is spurious as it depends on the time the thread system switches the threads | |
87 | //BOOST_TEST(d < ns(50000000)+ms(1000)); // within 50ms | |
88 | #endif | |
89 | } | |
90 | ||
91 | int main() | |
92 | { | |
93 | m.lock(); | |
94 | boost::thread t(f); | |
95 | #if defined BOOST_THREAD_USES_CHRONO | |
96 | boost::this_thread::sleep_for(ms(250)); | |
97 | #else | |
98 | #endif | |
99 | m.unlock(); | |
100 | t.join(); | |
101 | ||
102 | return boost::report_errors(); | |
103 | } | |
104 |