libstdc++-v3/testsuite/30_threads/packaged_task/members/get_future.cc

   1 // { dg-do run { target *-*-freebsd* *-*-dragonfly* *-*-netbsd* *-*-linux* *-*-gnu* *-*-solaris* *-*-cygwin *-*-darwin* powerpc-ibm-aix* } }
   2 // { dg-options " -std=gnu++0x -pthread" { target *-*-freebsd* *-*-dragonfly* *-*-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) 2009-2014 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
  27 #include <future>
  28 #include <testsuite_hooks.h>
  29
  30 int& inc(int& i) { return ++i; }
  31
  32 void test01()
  33 {
  34   bool test __attribute__((unused)) = true;
  35
  36   std::packaged_task<int&(int&)> p1(inc);
  37   std::future<int&> f1 = p1.get_future();
  38
  39   std::chrono::milliseconds delay(1);
  40   VERIFY( f1.valid() );
  41   VERIFY( f1.wait_for(delay) == std::future_status::timeout );
  42
  43   int i1 = 0;
  44
  45   p1(i1);
  46
  47   int& i2 = f1.get();
  48
  49   VERIFY( &i1 == &i2 );
  50   VERIFY( i1 == 1 );
  51 }
  52
  53 int main()
  54 {
  55   test01();
  56   return 0;
  57 }