1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
12 // class shared_mutex;
16 #include <shared_mutex>
21 #if _LIBCPP_STD_VER > 11
25 typedef std::chrono::system_clock Clock;
26 typedef Clock::time_point time_point;
27 typedef Clock::duration duration;
28 typedef std::chrono::milliseconds ms;
29 typedef std::chrono::nanoseconds ns;
33 time_point t0 = Clock::now();
34 assert(!m.try_lock());
35 assert(!m.try_lock());
36 assert(!m.try_lock());
39 time_point t1 = Clock::now();
41 ns d = t1 - t0 - ms(250);
42 assert(d < ms(200)); // within 200ms
45 #endif // _LIBCPP_STD_VER > 11
49 #if _LIBCPP_STD_VER > 11
52 std::this_thread::sleep_for(ms(250));
55 #endif // _LIBCPP_STD_VER > 11