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/null_mutex.hpp>
16 
17 // class null_mutex;
18 
19 // template <class Rep, class Period>
20 //     bool try_lock_for(const chrono::duration<Rep, Period>& rel_time);
21 
22 #include <boost/thread/null_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 
29 
30 boost::null_mutex m;
31 
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 
38 const ms max_diff(BOOST_THREAD_TEST_TIME_MS);
39 
f1()40 void f1()
41 {
42   time_point t0 = Clock::now();
43   BOOST_TEST(m.try_lock_for(ms(250)) == true);
44   time_point t1 = Clock::now();
45   BOOST_TEST(m.try_lock());
46   m.unlock();
47   m.unlock();
48   ns d = t1 - t0 ;
49   BOOST_THREAD_TEST_IT(d, ns(max_diff));
50 }
51 
main()52 int main()
53 {
54   {
55     m.lock();
56     boost::thread t(f1);
57     m.unlock();
58     t.join();
59   }
60 
61   return boost::report_errors();
62 }
63 
64 #else
65 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
66 #endif
67 
68