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/mutex.hpp> 16 17 // class mutex; 18 19 // bool try_lock(); 20 21 #include <boost/thread/mutex.hpp> 22 #include <boost/thread/thread.hpp> 23 #include <boost/detail/lightweight_test.hpp> 24 #include "../../../timming.hpp" 25 26 27 boost::mutex m; 28 29 #if defined BOOST_THREAD_USES_CHRONO 30 typedef boost::chrono::high_resolution_clock Clock; 31 typedef Clock::time_point time_point; 32 typedef Clock::duration duration; 33 typedef boost::chrono::milliseconds ms; 34 typedef boost::chrono::nanoseconds ns; 35 time_point t0; 36 time_point t1; 37 #endif 38 39 const ms max_diff(BOOST_THREAD_TEST_TIME_MS); 40 f()41void f() 42 { 43 #if defined BOOST_THREAD_USES_CHRONO 44 t0 = Clock::now(); 45 BOOST_TEST(!m.try_lock()); 46 BOOST_TEST(!m.try_lock()); 47 BOOST_TEST(!m.try_lock()); 48 while (!m.try_lock()) 49 ; 50 t1 = Clock::now(); 51 m.unlock(); 52 #else 53 //time_point t0 = Clock::now(); 54 //BOOST_TEST(!m.try_lock()); 55 //BOOST_TEST(!m.try_lock()); 56 //BOOST_TEST(!m.try_lock()); 57 while (!m.try_lock()) 58 ; 59 //time_point t1 = Clock::now(); 60 m.unlock(); 61 //ns d = t1 - t0 - ms(250); 62 //BOOST_TEST(d < max_diff); 63 #endif 64 65 } 66 main()67int main() 68 { 69 m.lock(); 70 boost::thread t(f); 71 #if defined BOOST_THREAD_USES_CHRONO 72 time_point t2 = Clock::now(); 73 boost::this_thread::sleep_for(ms(250)); 74 time_point t3 = Clock::now(); 75 #endif 76 m.unlock(); 77 t.join(); 78 79 #if defined BOOST_THREAD_USES_CHRONO 80 ns sleep_time = t3 - t2; 81 ns d_ns = t1 - t0 - sleep_time; 82 ms d_ms = boost::chrono::duration_cast<boost::chrono::milliseconds>(d_ns); 83 // BOOST_TEST_GE(d_ms.count(), 0); 84 BOOST_THREAD_TEST_IT(d_ms, max_diff); 85 BOOST_THREAD_TEST_IT(d_ns, ns(max_diff)); 86 #endif 87 88 return boost::report_errors(); 89 } 90 91 92