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 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 11 | |
| 12 | // <shared_mutex> |
| 13 | |
| 14 | // template <class Mutex> class shared_lock; |
| 15 | |
| 16 | // void lock(); |
| 17 | |
| 18 | #include <shared_mutex> |
| 19 | #include <thread> |
| 20 | #include <vector> |
| 21 | #include <cstdlib> |
| 22 | #include <cassert> |
| 23 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 24 | #if _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 25 | |
David Majnemer | f9f95be | 2014-03-17 20:19:44 +0000 | [diff] [blame] | 26 | std::shared_timed_mutex m; |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 27 | |
| 28 | typedef std::chrono::system_clock Clock; |
| 29 | typedef Clock::time_point time_point; |
| 30 | typedef Clock::duration duration; |
| 31 | typedef std::chrono::milliseconds ms; |
| 32 | typedef std::chrono::nanoseconds ns; |
| 33 | |
| 34 | void f() |
| 35 | { |
David Majnemer | f9f95be | 2014-03-17 20:19:44 +0000 | [diff] [blame] | 36 | std::shared_lock<std::shared_timed_mutex> lk(m, std::defer_lock); |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 37 | time_point t0 = Clock::now(); |
| 38 | lk.lock(); |
| 39 | time_point t1 = Clock::now(); |
| 40 | assert(lk.owns_lock() == true); |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 41 | ns d = t1 - t0 - ms(250); |
| 42 | assert(d < ms(25)); // within 25ms |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 43 | try |
| 44 | { |
| 45 | lk.lock(); |
| 46 | assert(false); |
| 47 | } |
| 48 | catch (std::system_error& e) |
| 49 | { |
| 50 | assert(e.code().value() == EDEADLK); |
| 51 | } |
| 52 | lk.unlock(); |
| 53 | lk.release(); |
| 54 | try |
| 55 | { |
| 56 | lk.lock(); |
| 57 | assert(false); |
| 58 | } |
| 59 | catch (std::system_error& e) |
| 60 | { |
| 61 | assert(e.code().value() == EPERM); |
| 62 | } |
| 63 | } |
| 64 | |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 65 | #endif // _LIBCPP_STD_VER > 11 |
| 66 | |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 67 | int main() |
| 68 | { |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 69 | #if _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 70 | m.lock(); |
| 71 | std::vector<std::thread> v; |
| 72 | for (int i = 0; i < 5; ++i) |
| 73 | v.push_back(std::thread(f)); |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 74 | std::this_thread::sleep_for(ms(250)); |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 75 | m.unlock(); |
| 76 | for (auto& t : v) |
| 77 | t.join(); |
Dan Albert | 1d4a1ed | 2016-05-25 22:36:09 -0700 | [diff] [blame^] | 78 | #endif // _LIBCPP_STD_VER > 11 |
Howard Hinnant | ba898e4 | 2013-09-21 01:49:28 +0000 | [diff] [blame] | 79 | } |