libstdc++-v3/testsuite/30_threads/shared_future/members/get.cc

   1 // { dg-do run }
   2 // { dg-options "-pthread"  }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-effective-target pthread }
   5 // { dg-require-gthreads "" }
   6
   7 // Copyright (C) 2009-2020 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24
  25 #include <future>
  26 #include <testsuite_hooks.h>
  27
  28 int value = 99;
  29
  30 void test01()
  31 {
  32   std::promise<int> p1;
  33   const std::shared_future<int> f1(p1.get_future());
  34   std::shared_future<int> f2(f1);
  35
  36   p1.set_value(value);
  37   VERIFY( f1.get() == value );
  38   VERIFY( f2.get() == value );
  39 }
  40
  41 void test02()
  42 {
  43   std::promise<int&> p1;
  44   const std::shared_future<int&> f1(p1.get_future());
  45   std::shared_future<int&> f2(f1);
  46
  47   p1.set_value(value);
  48   VERIFY( &f1.get() == &value );
  49   VERIFY( &f2.get() == &value );
  50 }
  51
  52 void test03()
  53 {
  54   std::promise<void> p1;
  55   const std::shared_future<void> f1(p1.get_future());
  56   std::shared_future<void> f2(f1);
  57
  58   p1.set_value();
  59   f1.get();
  60   f2.get();
  61 }
  62
  63 int main()
  64 {
  65   test01();
  66   test02();
  67   test03();
  68
  69   return 0;
  70 }