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// UNSUPPORTED: libcpp-has-no-threads 11 12// <shared_mutex> 13 14// class timed_mutex; 15 16// template <class Rep, class Period> 17// shared_lock(mutex_type& m, const chrono::duration<Rep, Period>& rel_time); 18 19#include <shared_mutex> 20#include <thread> 21#include <vector> 22#include <cstdlib> 23#include <cassert> 24 25#if _LIBCPP_STD_VER > 11 26 27std::shared_timed_mutex m; 28 29typedef std::chrono::steady_clock Clock; 30typedef Clock::time_point time_point; 31typedef Clock::duration duration; 32typedef std::chrono::milliseconds ms; 33typedef std::chrono::nanoseconds ns; 34 35void f1() 36{ 37 time_point t0 = Clock::now(); 38 std::shared_lock<std::shared_timed_mutex> lk(m, ms(300)); 39 assert(lk.owns_lock() == true); 40 time_point t1 = Clock::now(); 41 ns d = t1 - t0 - ms(250); 42 assert(d < ms(50)); // within 50ms 43} 44 45void f2() 46{ 47 time_point t0 = Clock::now(); 48 std::shared_lock<std::shared_timed_mutex> lk(m, ms(250)); 49 assert(lk.owns_lock() == false); 50 time_point t1 = Clock::now(); 51 ns d = t1 - t0 - ms(250); 52 assert(d < ms(50)); // within 50ms 53} 54 55#endif // _LIBCPP_STD_VER > 11 56 57int main() 58{ 59#if _LIBCPP_STD_VER > 11 60 { 61 m.lock(); 62 std::vector<std::thread> v; 63 for (int i = 0; i < 5; ++i) 64 v.push_back(std::thread(f1)); 65 std::this_thread::sleep_for(ms(250)); 66 m.unlock(); 67 for (auto& t : v) 68 t.join(); 69 } 70 { 71 m.lock(); 72 std::vector<std::thread> v; 73 for (int i = 0; i < 5; ++i) 74 v.push_back(std::thread(f2)); 75 std::this_thread::sleep_for(ms(300)); 76 m.unlock(); 77 for (auto& t : v) 78 t.join(); 79 } 80#endif // _LIBCPP_STD_VER > 11 81} 82