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) 2012 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/shared_lock_guard.hpp>
16 
17 // template <class Mutex> class shared_lock_guard;
18 
19 // shared_lock_guard(mutex_type& m, adopt_lock_t);
20 
21 #include <boost/thread/shared_lock_guard.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 #if defined BOOST_THREAD_USES_CHRONO
28 typedef boost::chrono::high_resolution_clock Clock;
29 typedef Clock::time_point time_point;
30 typedef Clock::duration duration;
31 typedef boost::chrono::milliseconds ms;
32 typedef boost::chrono::nanoseconds ns;
33 time_point t0;
34 time_point t1;
35 #else
36 #endif
37 
38 boost::shared_mutex m;
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     m.lock_shared();
48     boost::shared_lock_guard<boost::shared_mutex> lg(m, boost::adopt_lock);
49     t1 = Clock::now();
50   }
51 #else
52   //time_point t0 = Clock::now();
53   //time_point t1;
54   {
55     m.lock_shared();
56     boost::shared_lock_guard<boost::shared_mutex> lg(m, boost::adopt_lock);
57     //t1 = Clock::now();
58   }
59   //ns d = t1 - t0 - ms(250);
60   //BOOST_TEST(d < max_diff);
61 #endif
62 }
63 
main()64 int main()
65 {
66   m.lock();
67   boost::thread t(f);
68 #if defined BOOST_THREAD_USES_CHRONO
69   time_point t2 = Clock::now();
70   boost::this_thread::sleep_for(ms(250));
71   time_point t3 = Clock::now();
72 #else
73 #endif
74   m.unlock();
75   t.join();
76 
77 #if defined BOOST_THREAD_USES_CHRONO
78   ns sleep_time = t3 - t2;
79   ns d_ns = t1 - t0 - sleep_time;
80   ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns);
81   // BOOST_TEST_GE(d_ms.count(), 0);
82   BOOST_THREAD_TEST_IT(d_ms, max_diff);
83   BOOST_THREAD_TEST_IT(d_ns, ns(max_diff));
84 #endif
85 
86   return boost::report_errors();
87 }
88 
89