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// <mutex> 11 12// class timed_mutex; 13 14// template <class Rep, class Period> 15// unique_lock(mutex_type& m, const chrono::duration<Rep, Period>& rel_time); 16 17#include <mutex> 18#include <thread> 19#include <cstdlib> 20#include <cassert> 21 22std::timed_mutex m; 23 24typedef std::chrono::steady_clock Clock; 25typedef Clock::time_point time_point; 26typedef Clock::duration duration; 27typedef std::chrono::milliseconds ms; 28typedef std::chrono::nanoseconds ns; 29 30void f1() 31{ 32 time_point t0 = Clock::now(); 33 std::unique_lock<std::timed_mutex> lk(m, ms(300)); 34 assert(lk.owns_lock() == true); 35 time_point t1 = Clock::now(); 36 ns d = t1 - t0 - ms(250); 37 assert(d < ms(50)); // within 50ms 38} 39 40void f2() 41{ 42 time_point t0 = Clock::now(); 43 std::unique_lock<std::timed_mutex> lk(m, ms(250)); 44 assert(lk.owns_lock() == false); 45 time_point t1 = Clock::now(); 46 ns d = t1 - t0 - ms(250); 47 assert(d < ms(50)); // within 50ms 48} 49 50int main() 51{ 52 { 53 m.lock(); 54 std::thread t(f1); 55 std::this_thread::sleep_for(ms(250)); 56 m.unlock(); 57 t.join(); 58 } 59 { 60 m.lock(); 61 std::thread t(f2); 62 std::this_thread::sleep_for(ms(300)); 63 m.unlock(); 64 t.join(); 65 } 66} 67