libstdc++-v3/testsuite/30_threads/packaged_task/members/at_thread_exit.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-gthreads "" }
   6
   7 // Copyright (C) 2014-2019 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24
  25 #include <future>
  26 #include <testsuite_hooks.h>
  27
  28 bool executed = false;
  29
  30 int execute(int i) { executed = true; return i + 1; }
  31
  32 std::future<int> f1;
  33
  34 bool ready(std::future<int>& f)
  35 {
  36   return f.wait_for(std::chrono::milliseconds(1)) == std::future_status::ready;
  37 }
  38
  39 void test01()
  40 {
  41   std::packaged_task<int(int)> p1(execute);
  42   f1 = p1.get_future();
  43
  44   p1.make_ready_at_thread_exit(1);
  45
  46   VERIFY( executed );
  47   VERIFY( p1.valid() );
  48   VERIFY( !ready(f1) );
  49 }
  50
  51 int main()
  52 {
  53   std::thread t{test01};
  54   t.join();
  55   VERIFY( ready(f1) );
  56   VERIFY( f1.get() == 2 );
  57 }