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

   1 // { dg-do run }
   2 // { dg-additional-options "-pthread" { target pthread } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-gthreads "" }
   5
   6 // Copyright (C) 2010-2022 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23
  24 #include <future>
  25 #include <testsuite_hooks.h>
  26
  27 struct Chucky
  28 {
  29   Chucky() : copied(false) { }
  30
  31   Chucky(const Chucky& other) : copied(true)
  32   {
  33     if (other.copied)
  34       return;
  35     other.copied = true;
  36     using namespace std;
  37     // Throw on first DECAY_COPY to simulate inability to start a new thread.
  38     throw system_error(make_error_code(errc::resource_unavailable_try_again));
  39   }
  40
  41   void operator()() const { }
  42
  43   mutable bool copied;
  44 };
  45
  46 void test01()
  47 {
  48   using namespace std;
  49
  50   future<void> f = async(Chucky{});
  51   VERIFY( f.wait_for(chrono::seconds(100)) == future_status::deferred );
  52
  53   bool caught = false;
  54   try {
  55     f = async(launch::async, Chucky{});
  56   } catch (const system_error&) {
  57     caught = true;
  58   }
  59   VERIFY( caught );
  60 }
  61
  62 int main()
  63 {
  64   test01();
  65 }