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 12 13 // <future> 14 15 // class promise<R> 16 17 // void promise<R&>::set_value_at_thread_exit(R& r); 18 19 #include <future> 20 #include <memory> 21 #include <cassert> 22 23 int i = 0; 24 25 void func(std::promise<int&> p) 26 { 27 p.set_value_at_thread_exit(i); 28 i = 4; 29 } 30 31 int main() 32 { 33 { 34 std::promise<int&> p; 35 std::future<int&> f = p.get_future(); 36 std::thread(func, std::move(p)).detach(); 37 assert(f.get() == 4); 38 } 39 } 40
