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 #include "../../../../../timming.hpp"
27
28
29 boost::mutex m;
30
31 #if defined BOOST_THREAD_USES_CHRONO
32 typedef boost::chrono::high_resolution_clock Clock;
33 typedef Clock::time_point time_point;
34 typedef Clock::duration duration;
35 typedef boost::chrono::milliseconds ms;
36 typedef boost::chrono::nanoseconds ns;
37 time_point t0;
38 time_point t1;
39 #else
40 #endif
41
42 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
43
f()44 void f()
45 {
46 #if defined BOOST_THREAD_USES_CHRONO
47 t0 = Clock::now();
48 {
49 boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
50 BOOST_TEST(lk.owns_lock() == false);
51 }
52 {
53 boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
54 BOOST_TEST(lk.owns_lock() == false);
55 }
56 {
57 boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
58 BOOST_TEST(lk.owns_lock() == false);
59 }
60 for (;;)
61 {
62 boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
63 if (lk.owns_lock()) {
64 t1 = Clock::now();
65 break;
66 }
67 }
68 //m.unlock();
69 #else
70 // time_point t0 = Clock::now();
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 // {
80 // boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
81 // BOOST_TEST(lk.owns_lock() == false);
82 // }
83 for (;;)
84 {
85 boost::unique_lock<boost::mutex> lk(m, boost::try_to_lock);
86 if (lk.owns_lock()) break;
87 }
88 //time_point t1 = Clock::now();
89 //ns d = t1 - t0 - ms(250);
90 //BOOST_TEST(d < max_diff);
91 #endif
92 }
93
main()94 int main()
95 {
96 m.lock();
97 boost::thread t(f);
98 #if defined BOOST_THREAD_USES_CHRONO
99 time_point t2 = Clock::now();
100 boost::this_thread::sleep_for(ms(250));
101 time_point t3 = Clock::now();
102 #else
103 #endif
104 m.unlock();
105 t.join();
106
107 #if defined BOOST_THREAD_USES_CHRONO
108 ns sleep_time = t3 - t2;
109 ns d_ns = t1 - t0 - sleep_time;
110 ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
111 std::cout << "d_ns: " << d_ns.count() << std::endl;
112 std::cout << "d_ms: " << d_ms.count() << std::endl;
113 // BOOST_TEST_GE(d_ms.count(), 0);
114 BOOST_THREAD_TEST_IT(d_ms, max_diff);
115 BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
116 #endif
117
118 return boost::report_errors();
119 }
120
121