libcxx/test/std/thread/futures/futures.promise/set_rvalue_at_thread_exit.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // UNSUPPORTED: no-threads, c++03
  10
  11 // <future>
  12
  13 // class promise<R>
  14
  15 // void promise::set_value_at_thread_exit(R&& r);
  16
  17 #include <future>
  18 #include <memory>
  19 #include <cassert>
  20
  21 #include "make_test_thread.h"
  22 #include "test_macros.h"
  23
  24 void func(std::promise<std::unique_ptr<int>> p)
  25 {
  26     p.set_value_at_thread_exit(std::unique_ptr<int>(new int(5)));
  27 }
  28
  29 int main(int, char**)
  30 {
  31     {
  32         std::promise<std::unique_ptr<int>> p;
  33         std::future<std::unique_ptr<int>> f = p.get_future();
  34         support::make_test_thread(func, std::move(p)).detach();
  35         assert(*f.get() == 5);
  36     }
  37
  38   return 0;
  39 }