libstdc++-v3/testsuite/30_threads/call_once/66146.cc

   1 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++11 } }
  19 // { dg-additional-options "-pthread" { target pthread } }
  20
  21 // Currently std::call_once is broken for gthreads targets without futexes:
  22 // { dg-skip-if "see PR 66146" { gthreads && { ! futex } } }
  23
  24 #include <mutex>
  25 #include <cstdlib>
  26 #include <testsuite_hooks.h>
  27
  28 void
  29 test01()
  30 {
  31   std::once_flag once;
  32   int counter = 0;
  33   for (int i = 0; i < 10; ++i)
  34   {
  35     try
  36     {
  37       std::call_once(once, [&]{ if (i < 3) throw i; ++counter; });
  38       VERIFY(i >= 3);
  39     }
  40     catch (int ex)
  41     {
  42       VERIFY(i < 3);
  43     }
  44   }
  45  VERIFY(counter == 1);
  46  std::call_once(once, []{ std::abort(); });
  47 }
  48
  49 int
  50 main()
  51 {
  52   test01();
  53 }