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

   1 // { dg-do run { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options " -std=gnu++0x -pthread" { target *-*-freebsd* *-*-netbsd* *-*-linux* *-*-gnu* powerpc-ibm-aix* } }
   3 // { dg-options " -std=gnu++0x -pthreads" { target *-*-solaris* } }
   4 // { dg-options " -std=gnu++0x " { target *-*-cygwin *-*-darwin* } }
   5 // { dg-require-cstdint "" }
   6 // { dg-require-gthreads "" }
   7 // { dg-require-atomic-builtins "" }
   8
   9 // Copyright (C) 2010-2014 Free Software Foundation, Inc.
  10 //
  11 // This file is part of the GNU ISO C++ Library.  This library is free
  12 // software; you can redistribute it and/or modify it under the
  13 // terms of the GNU General Public License as published by the
  14 // Free Software Foundation; either version 3, or (at your option)
  15 // any later version.
  16
  17 // This library is distributed in the hope that it will be useful,
  18 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 // GNU General Public License for more details.
  21
  22 // You should have received a copy of the GNU General Public License along
  23 // with this library; see the file COPYING3.  If not see
  24 // <http://www.gnu.org/licenses/>.
  25
  26 #include <future>
  27 #include <testsuite_hooks.h>
  28
  29 int do_work1(int value) { return value; }
  30 int do_work2(int value) { return value * 2; }
  31
  32 int work1(int value)
  33 {
  34   auto handle = std::async([=] { return do_work2(value); });
  35   int tmp = do_work1(value);
  36   return tmp + handle.get();
  37 }
  38
  39 int work2(int value)
  40 {
  41   auto handle = std::async(do_work2, value);
  42   int tmp = do_work1(value);
  43   return tmp + handle.get();
  44 }
  45
  46 // libstdc++/42819
  47 void test01()
  48 {
  49   bool test __attribute__((unused)) = true;
  50
  51   VERIFY( work1(1) == 3 );
  52   VERIFY( work2(2) == 6 );
  53 }
  54
  55 int main()
  56 {
  57   test01();
  58   return 0;
  59 }