Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 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 | //===----------------------------------------------------------------------===// |
Jonathan Roelofs | 8d86b2e | 2014-09-05 19:45:05 +0000 | [diff] [blame] | 9 | // |
| 10 | // UNSUPPORTED: libcpp-has-no-threads |
Marshall Clow | f54ca46 | 2015-06-11 21:47:39 +0000 | [diff] [blame] | 11 | // UNSUPPORTED: c++03, c++98, c++11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 12 | |
| 13 | // <shared_mutex> |
| 14 | |
David Majnemer | f9f95be | 2014-03-17 20:19:44 +0000 | [diff] [blame] | 15 | // class shared_timed_mutex; |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 16 | |
| 17 | // void lock(); |
| 18 | |
| 19 | #include <shared_mutex> |
| 20 | #include <thread> |
| 21 | #include <cstdlib> |
| 22 | #include <cassert> |
| 23 | |
David Majnemer | f9f95be | 2014-03-17 20:19:44 +0000 | [diff] [blame] | 24 | std::shared_timed_mutex m; |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 25 | |
| 26 | typedef std::chrono::system_clock Clock; |
| 27 | typedef Clock::time_point time_point; |
| 28 | typedef Clock::duration duration; |
| 29 | typedef std::chrono::milliseconds ms; |
| 30 | typedef std::chrono::nanoseconds ns; |
| 31 | |
| 32 | void f() |
| 33 | { |
| 34 | time_point t0 = Clock::now(); |
| 35 | m.lock(); |
| 36 | time_point t1 = Clock::now(); |
| 37 | m.unlock(); |
| 38 | ns d = t1 - t0 - ms(250); |
| 39 | assert(d < ms(50)); // within 50ms |
| 40 | } |
| 41 | |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 42 | int main() |
| 43 | { |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 44 | m.lock(); |
| 45 | std::thread t(f); |
| 46 | std::this_thread::sleep_for(ms(250)); |
| 47 | m.unlock(); |
| 48 | t.join(); |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 49 | } |