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 upgrade_lock;
18
19 // upgrade_lock(mutex_type& m, try_to_lock_t);
20
21
22 #include <boost/thread/lock_types.hpp>
23 #include <boost/thread/shared_mutex.hpp>
24 #include <boost/thread/thread.hpp>
25 #include <boost/detail/lightweight_test.hpp>
26 #include "../../../../../timming.hpp"
27
28 boost::shared_mutex m;
29
30 #if defined BOOST_THREAD_USES_CHRONO
31 typedef boost::chrono::high_resolution_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 time_point t0;
37 time_point t1;
38 #else
39 #endif
40
41 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
42
f()43 void f()
44 {
45 #if defined BOOST_THREAD_USES_CHRONO
46 t0 = Clock::now();
47 {
48 boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
49 BOOST_TEST(lk.owns_lock() == false);
50 }
51 {
52 boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
53 BOOST_TEST(lk.owns_lock() == false);
54 }
55 {
56 boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
57 BOOST_TEST(lk.owns_lock() == false);
58 }
59 for (;;)
60 {
61 boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
62 if (lk.owns_lock()) {
63 t1 = Clock::now();
64 break;
65 }
66 }
67 //m.unlock();
68 #else
69 // time_point t0 = Clock::now();
70 // {
71 // boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
72 // BOOST_TEST(lk.owns_lock() == false);
73 // }
74 // {
75 // boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
76 // BOOST_TEST(lk.owns_lock() == false);
77 // }
78 // {
79 // boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
80 // BOOST_TEST(lk.owns_lock() == false);
81 // }
82 for (;;)
83 {
84 boost::upgrade_lock<boost::shared_mutex> lk(m, boost::try_to_lock);
85 if (lk.owns_lock()) break;
86 }
87 //time_point t1 = Clock::now();
88 //ns d = t1 - t0 - ms(250);
89 //BOOST_TEST(d < max_diff);
90 #endif
91 }
92
main()93 int main()
94 {
95 m.lock();
96 boost::thread t(f);
97 #if defined BOOST_THREAD_USES_CHRONO
98 time_point t2 = Clock::now();
99 boost::this_thread::sleep_for(ms(250));
100 time_point t3 = Clock::now();
101 #else
102 #endif
103 m.unlock();
104 t.join();
105
106 #if defined BOOST_THREAD_USES_CHRONO
107 ns sleep_time = t3 - t2;
108 ns d_ns = t1 - t0 - sleep_time;
109 ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
110 // BOOST_TEST_GE(d_ms.count(), 0);
111 BOOST_THREAD_TEST_IT(d_ms, max_diff);
112 BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
113 #endif
114
115 return boost::report_errors();
116 }
117
118