libstdc++-v3/testsuite/30_threads/try_lock/1.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) 2008-2024 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 <mutex>
  25 #include <system_error>
  26 #include <testsuite_hooks.h>
  27
  28 int main()
  29 {
  30   typedef std::mutex mutex_type;
  31   typedef std::unique_lock<mutex_type> lock_type;
  32
  33   try
  34     {
  35       mutex_type m1, m2, m3;
  36       lock_type l1(m1, std::defer_lock),
  37         l2(m2, std::defer_lock),
  38         l3(m3, std::defer_lock);
  39
  40       try
  41         {
  42           int result = std::try_lock(l1, l2, l3);
  43           VERIFY( result == -1 );
  44         }
  45       catch (const std::system_error& e)
  46         {
  47           VERIFY( false );
  48         }
  49     }
  50   catch (const std::system_error& e)
  51     {
  52       VERIFY( false );
  53     }
  54   catch (...)
  55     {
  56       VERIFY( false );
  57     }
  58
  59   return 0;
  60 }