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 shared_lock;
18
19 // shared_lock(mutex_type& m, try_to_lock_t);
20
21 #include <boost/thread/lock_types.hpp>
22 #include <boost/thread/shared_mutex.hpp>
23 #include <boost/thread/thread.hpp>
24 #include <boost/detail/lightweight_test.hpp>
25 #include "../../../../../timming.hpp"
26
27 boost::shared_mutex m;
28
29 #if defined BOOST_THREAD_USES_CHRONO
30 typedef boost::chrono::high_resolution_clock Clock;
31 typedef Clock::time_point time_point;
32 typedef Clock::duration duration;
33 typedef boost::chrono::milliseconds ms;
34 typedef boost::chrono::nanoseconds ns;
35 time_point t0;
36 time_point t1;
37 #else
38 #endif
39
40 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
41
f()42 void f()
43 {
44 #if defined BOOST_THREAD_USES_CHRONO
45 t0 = Clock::now();
46 {
47 boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
48 BOOST_TEST(lk.owns_lock() == false);
49 }
50 {
51 boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
52 BOOST_TEST(lk.owns_lock() == false);
53 }
54 {
55 boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
56 BOOST_TEST(lk.owns_lock() == false);
57 }
58 for (;;)
59 {
60 boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
61 if (lk.owns_lock()) {
62 t1 = Clock::now();
63 break;
64 }
65 }
66 #else
67 // time_point t0 = Clock::now();
68 // {
69 // boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
70 // BOOST_TEST(lk.owns_lock() == false);
71 // }
72 // {
73 // boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
74 // BOOST_TEST(lk.owns_lock() == false);
75 // }
76 // {
77 // boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
78 // BOOST_TEST(lk.owns_lock() == false);
79 // }
80 for (;;)
81 {
82 boost::shared_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
83 if (lk.owns_lock()) break;
84 }
85 //time_point t1 = Clock::now();
86 //ns d = t1 - t0 - ms(250);
87 //BOOST_TEST(d < max_diff);
88 #endif
89 }
90
main()91 int main()
92 {
93 m.lock();
94 boost::thread t(f);
95 #if defined BOOST_THREAD_USES_CHRONO
96 time_point t2 = Clock::now();
97 boost::this_thread::sleep_for(ms(250));
98 time_point t3 = Clock::now();
99 #else
100 #endif
101 m.unlock();
102 t.join();
103
104 #if defined BOOST_THREAD_USES_CHRONO
105 ns sleep_time = t3 - t2;
106 ns d_ns = t1 - t0 - sleep_time;
107 ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
108 // BOOST_TEST_GE(d_ms.count(), 0);
109 BOOST_THREAD_TEST_IT(d_ms, max_diff);
110 BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
111 #endif
112
113 return boost::report_errors();
114 }
115
116