libstdc++-v3/testsuite/30_threads/async/42819.cc

   1 // { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-rtems* *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options "-pthread" { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* powerpc-ibm-aix* } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-cstdint "" }
   5 // { dg-require-gthreads "" }
   6 // { dg-require-atomic-builtins "" }
   7
   8 // Copyright (C) 2010-2017 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 #include <future>
  26 #include <testsuite_hooks.h>
  27
  28 int do_work1(int value) { return value; }
  29 int do_work2(int value) { return value * 2; }
  30
  31 int work1(int value)
  32 {
  33   auto handle = std::async([=] { return do_work2(value); });
  34   int tmp = do_work1(value);
  35   return tmp + handle.get();
  36 }
  37
  38 int work2(int value)
  39 {
  40   auto handle = std::async(do_work2, value);
  41   int tmp = do_work1(value);
  42   return tmp + handle.get();
  43 }
  44
  45 // libstdc++/42819
  46 void test01()
  47 {
  48   VERIFY( work1(1) == 3 );
  49   VERIFY( work2(2) == 6 );
  50 }
  51
  52 int main()
  53 {
  54   test01();
  55   return 0;
  56 }