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 // Copyright (C) 2011 Vicente J. Botet Escriba
10 //
11 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
12 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
13 
14 // <boost/thread/thread.hpp>
15 
16 // thread::id this_thread::get_id();
17 
18 #include <boost/thread/thread_only.hpp>
19 #include <cstdlib>
20 #include <algorithm>
21 
22 #include <boost/detail/lightweight_test.hpp>
23 
24 #if defined BOOST_THREAD_USES_CHRONO
25 
main()26 int main()
27 {
28   {
29     typedef boost::chrono::system_clock Clock;
30     typedef Clock::time_point time_point;
31     boost::chrono::milliseconds ms(500);
32     time_point t0 = Clock::now();
33     boost::this_thread::sleep_for(ms);
34     time_point t1 = Clock::now();
35     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
36     boost::chrono::nanoseconds err = ms / 100;
37     // The time slept is within 1% of 500ms
38     // This test is spurious as it depends on the time the thread system switches the threads
39     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
40     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
41   }
42   {
43     typedef boost::chrono::system_clock Clock;
44     typedef Clock::time_point time_point;
45     boost::chrono::milliseconds ms(500);
46     time_point t0 = Clock::now();
47     boost::this_thread::no_interruption_point::sleep_for(ms);
48     time_point t1 = Clock::now();
49     boost::chrono::nanoseconds ns = (t1 - t0) - ms;
50     boost::chrono::nanoseconds err = ms / 100;
51     // The time slept is within 1% of 500ms
52     // This test is spurious as it depends on the time the thread system switches the threads
53     BOOST_TEST((std::max)(ns.count(), -ns.count()) < (err+boost::chrono::milliseconds(1000)).count());
54     //BOOST_TEST(std::abs(static_cast<long>(ns.count())) < (err+boost::chrono::milliseconds(1000)).count());
55   }
56   return boost::report_errors();
57 
58 }
59 
60 #else
61 #error "Test not applicable: BOOST_THREAD_USES_CHRONO not defined for this platform as not supported"
62 #endif
63 
64