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 packaged_task<R(ArgTypes...)> 15 16 // ~packaged_task(); 17 18 #include <future> 19 #include <cassert> 20 21 class A 22 { 23 long data_; 24 25 public: 26 explicit A(long i) : data_(i) {} 27 28 long operator()(long i, long j) const {return data_ + i + j;} 29 }; 30 31 void func(std::packaged_task<double(int, char)> p) 32 { 33 } 34 35 void func2(std::packaged_task<double(int, char)> p) 36 { 37 p(3, 'a'); 38 } 39 40 int main() 41 { 42 { 43 std::packaged_task<double(int, char)> p(A(5)); 44 std::future<double> f = p.get_future(); 45 std::thread(func, std::move(p)).detach(); 46 try 47 { 48 double i = f.get(); 49 assert(false); 50 } 51 catch (const std::future_error& e) 52 { 53 assert(e.code() == make_error_code(std::future_errc::broken_promise)); 54 } 55 } 56 { 57 std::packaged_task<double(int, char)> p(A(5)); 58 std::future<double> f = p.get_future(); 59 std::thread(func2, std::move(p)).detach(); 60 assert(f.get() == 105.0); 61 } 62 } 63
