libstdc++-v3/testsuite/30_threads/async/any.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-cstdint "" }
   6 // { dg-require-gthreads "" }
   7
   8 // Copyright (C) 2010-2018 Free Software Foundation, Inc.
   9 //
  10 // This file is part of the GNU ISO C++ Library.  This library is free
  11 // software; you can redistribute it and/or modify it under the
  12 // terms of the GNU General Public License as published by the
  13 // Free Software Foundation; either version 3, or (at your option)
  14 // any later version.
  15
  16 // This library is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20
  21 // You should have received a copy of the GNU General Public License along
  22 // with this library; see the file COPYING3.  If not see
  23 // <http://www.gnu.org/licenses/>.
  24
  25
  26 #include <future>
  27 #include <testsuite_hooks.h>
  28
  29 struct sum {
  30   typedef int result_type;
  31   int operator()(int i, int& j, const int& k) { return i + j + k; }
  32 };
  33
  34 void test01()
  35 {
  36   using namespace std;
  37
  38   int a = 1;
  39   int b = 10;
  40   int c = 100;
  41   future<int> f1 = async(launch::async|launch::deferred, sum(), a, ref(b), cref(c));
  42   future<int> f2 = async(sum(), a, ref(b), cref(c));
  43
  44   VERIFY( f1.valid() );
  45   VERIFY( f2.valid() );
  46   int r1 = f1.get();
  47   int r2 = f2.get();
  48   VERIFY( r1 == r2 );
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }