Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. // -*- C++ -*-
  2.  
  3. // Copyright (C) 2005-2015 Free Software Foundation, Inc.
  4. //
  5. // This file is part of the GNU ISO C++ Library.  This library is free
  6. // software; you can redistribute it and/or modify it under the terms
  7. // of the GNU General Public License as published by the Free Software
  8. // Foundation; either version 3, or (at your option) any later
  9. // version.
  10.  
  11. // This library is distributed in the hope that it will be useful, but
  12. // WITHOUT ANY WARRANTY; without even the implied warranty of
  13. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14. // General Public License for more details.
  15.  
  16. // Under Section 7 of GPL version 3, you are granted additional
  17. // permissions described in the GCC Runtime Library Exception, version
  18. // 3.1, as published by the Free Software Foundation.
  19.  
  20. // You should have received a copy of the GNU General Public License and
  21. // a copy of the GCC Runtime Library Exception along with this program;
  22. // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23. // <http://www.gnu.org/licenses/>.
  24.  
  25. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  26.  
  27. // Permission to use, copy, modify, sell, and distribute this software
  28. // is hereby granted without fee, provided that the above copyright
  29. // notice appears in all copies, and that both that copyright notice
  30. // and this permission notice appear in supporting documentation. None
  31. // of the above authors, nor IBM Haifa Research Laboratories, make any
  32. // representation about the suitability of this software for any
  33. // purpose. It is provided "as is" without express or implied
  34. // warranty.
  35.  
  36. /**
  37.  * @file detail/cond_dealtor.hpp
  38.  * Contains a conditional deallocator.
  39.  */
  40.  
  41. #ifndef PB_DS_COND_DEALTOR_HPP
  42. #define PB_DS_COND_DEALTOR_HPP
  43.  
  44. namespace __gnu_pbds
  45. {
  46.   namespace detail
  47.   {
  48.     /// Conditional deallocate constructor argument.
  49.     template<typename Entry, typename _Alloc>
  50.       class cond_dealtor
  51.       {
  52.         typedef typename _Alloc::template rebind<Entry> __rebind_e;
  53.  
  54.       public:
  55.         typedef typename __rebind_e::other              entry_allocator;
  56.         typedef typename entry_allocator::pointer       entry_pointer;
  57.  
  58.         cond_dealtor(entry_pointer p_e)
  59.         : m_p_e(p_e), m_no_action_destructor(false) { }
  60.  
  61.         ~cond_dealtor()
  62.         {
  63.           if (m_no_action_destructor)
  64.             return;
  65.           s_alloc.deallocate(m_p_e, 1);
  66.         }
  67.  
  68.         void
  69.         set_no_action()
  70.         { m_no_action_destructor = true; }
  71.  
  72.       private:
  73.         entry_pointer           m_p_e;
  74.         bool                    m_no_action_destructor;
  75.         static entry_allocator  s_alloc;
  76.       };
  77.  
  78.     template<typename Entry, class _Alloc>
  79.       typename cond_dealtor<Entry, _Alloc>::entry_allocator
  80.       cond_dealtor<Entry, _Alloc>::s_alloc;
  81.   } // namespace detail
  82. } // namespace __gnu_pbds
  83.  
  84. #endif // #ifndef PB_DS_COND_DEALTOR_HPP
  85.