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 // void lock(); 20 21 #include <boost/thread/null_mutex.hpp> 22 #include <boost/thread/thread.hpp> 23 #include <boost/detail/lightweight_test.hpp> 24 #include "../../../timming.hpp" 25 26 boost::null_mutex m; 27 28 #if defined BOOST_THREAD_USES_CHRONO 29 typedef boost::chrono::high_resolution_clock Clock; 30 typedef Clock::time_point time_point; 31 typedef Clock::duration duration; 32 typedef boost::chrono::milliseconds ms; 33 typedef boost::chrono::nanoseconds ns; 34 #else 35 #endif 36 37 const ms max_diff(BOOST_THREAD_TEST_TIME_MS); 38 f()39void f() 40 { 41 #if defined BOOST_THREAD_USES_CHRONO 42 time_point t0 = Clock::now(); 43 m.lock(); 44 time_point t1 = Clock::now(); 45 m.lock(); 46 m.unlock(); 47 m.unlock(); 48 ns d = t1 - t0 ; 49 BOOST_THREAD_TEST_IT(d, ns(max_diff)); 50 #else 51 //time_point t0 = Clock::now(); 52 m.lock(); 53 //time_point t1 = Clock::now(); 54 m.lock(); 55 m.unlock(); 56 m.unlock(); 57 //ns d = t1 - t0 ; 58 //BOOST_TEST(d < max_diff); 59 #endif 60 } 61 main()62int main() 63 { 64 m.lock(); 65 boost::thread t(f); 66 m.unlock(); 67 t.join(); 68 69 return boost::report_errors(); 70 } 71 72 73