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 // UNSUPPORTED: c++98, c++03, c++11 12 13 // <shared_mutex> 14 15 // template <class Mutex> class shared_lock; 16 17 // template <class Clock, class Duration> 18 // bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time); 19 20 #include <shared_mutex> 21 #include <cassert> 22 23 #include "test_macros.h" 24 25 bool try_lock_until_called = false; 26 27 struct mutex 28 { 29 template <class Clock, class Duration> 30 bool try_lock_shared_until(const std::chrono::time_point<Clock, Duration>& abs_time) 31 { 32 typedef std::chrono::milliseconds ms; 33 assert(Clock::now() - abs_time < ms(5)); 34 try_lock_until_called = !try_lock_until_called; 35 return try_lock_until_called; 36 } 37 void unlock_shared() {} 38 }; 39 40 mutex m; 41 42 int main() 43 { 44 typedef std::chrono::steady_clock Clock; 45 std::shared_lock<mutex> lk(m, std::defer_lock); 46 assert(lk.try_lock_until(Clock::now()) == true); 47 assert(try_lock_until_called == true); 48 assert(lk.owns_lock() == true); 49 #ifndef TEST_HAS_NO_EXCEPTIONS 50 try 51 { 52 lk.try_lock_until(Clock::now()); 53 assert(false); 54 } 55 catch (std::system_error& e) 56 { 57 assert(e.code().value() == EDEADLK); 58 } 59 #endif 60 lk.unlock(); 61 assert(lk.try_lock_until(Clock::now()) == false); 62 assert(try_lock_until_called == false); 63 assert(lk.owns_lock() == false); 64 lk.release(); 65 #ifndef TEST_HAS_NO_EXCEPTIONS 66 try 67 { 68 lk.try_lock_until(Clock::now()); 69 assert(false); 70 } 71 catch (std::system_error& e) 72 { 73 assert(e.code().value() == EPERM); 74 } 75 #endif 76 } 77
