| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // XFAIL: libcpp-no-exceptions |
| // UNSUPPORTED: libcpp-has-no-threads |
| // UNSUPPORTED: c++98, c++03, c++11 |
| |
| // <shared_mutex> |
| |
| // template <class Mutex> class shared_lock; |
| |
| // template <class Rep, class Period> |
| // bool try_lock_for(const chrono::duration<Rep, Period>& rel_time); |
| |
| #include <shared_mutex> |
| #include <cassert> |
| |
| bool try_lock_for_called = false; |
| |
| typedef std::chrono::milliseconds ms; |
| |
| struct mutex |
| { |
| template <class Rep, class Period> |
| bool try_lock_shared_for(const std::chrono::duration<Rep, Period>& rel_time) |
| { |
| assert(rel_time == ms(5)); |
| try_lock_for_called = !try_lock_for_called; |
| return try_lock_for_called; |
| } |
| void unlock_shared() {} |
| }; |
| |
| mutex m; |
| |
| int main() |
| { |
| std::shared_lock<mutex> lk(m, std::defer_lock); |
| assert(lk.try_lock_for(ms(5)) == true); |
| assert(try_lock_for_called == true); |
| assert(lk.owns_lock() == true); |
| try |
| { |
| lk.try_lock_for(ms(5)); |
| assert(false); |
| } |
| catch (std::system_error& e) |
| { |
| assert(e.code().value() == EDEADLK); |
| } |
| lk.unlock(); |
| assert(lk.try_lock_for(ms(5)) == false); |
| assert(try_lock_for_called == false); |
| assert(lk.owns_lock() == false); |
| lk.release(); |
| try |
| { |
| lk.try_lock_for(ms(5)); |
| assert(false); |
| } |
| catch (std::system_error& e) |
| { |
| assert(e.code().value() == EPERM); |
| } |
| } |