libstdc++-v3/testsuite/30_threads/async/any.cc

   1 // { dg-do run }
   2 // { dg-additional-options "-pthread" { target pthread } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-gthreads "" }
   5
   6 // Copyright (C) 2010-2024 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23
  24 #include <future>
  25 #include <testsuite_hooks.h>
  26
  27 struct sum {
  28   typedef int result_type;
  29   int operator()(int i, int& j, const int& k) { return i + j + k; }
  30 };
  31
  32 void test01()
  33 {
  34   using namespace std;
  35
  36   int a = 1;
  37   int b = 10;
  38   int c = 100;
  39   future<int> f1 = async(launch::async|launch::deferred, sum(), a, ref(b), cref(c));
  40   future<int> f2 = async(sum(), a, ref(b), cref(c));
  41
  42   VERIFY( f1.valid() );
  43   VERIFY( f2.valid() );
  44   int r1 = f1.get();
  45   int r2 = f2.get();
  46   VERIFY( r1 == r2 );
  47 }
  48
  49 int main()
  50 {
  51   test01();
  52   return 0;
  53 }