libstdc++-v3/testsuite/30_threads/lock/3.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) 2010-2023 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 struct user_lock
  29 {
  30   user_lock() : is_locked(false) { }
  31   ~user_lock() = default;
  32   user_lock(const user_lock&) = default;
  33
  34   void lock()
  35   {
  36     VERIFY( !is_locked );
  37     is_locked = true;
  38   }
  39
  40   bool try_lock()
  41   { return is_locked ? false : (is_locked = true); }
  42
  43   void unlock()
  44   {
  45     VERIFY( is_locked );
  46     is_locked = false;
  47   }
  48
  49 private:
  50   bool is_locked;
  51 };
  52
  53 int main()
  54 {
  55   try
  56     {
  57       std::mutex m1;
  58       std::recursive_mutex m2;
  59       user_lock m3;
  60
  61       try
  62         {
  63           //heterogeneous types
  64           std::lock(m1, m2, m3);
  65           VERIFY( !m1.try_lock() );
  66           VERIFY( !m3.try_lock() );
  67           m1.unlock();
  68           m2.unlock();
  69           m3.unlock();
  70         }
  71       catch (const std::system_error& e)
  72         {
  73           VERIFY( false );
  74         }
  75     }
  76   catch (const std::system_error& e)
  77     {
  78       VERIFY( false );
  79     }
  80   catch (...)
  81     {
  82       VERIFY( false );
  83     }
  84
  85   return 0;
  86 }