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