| // -*- C++ -*- |
| |
| // Copyright (C) 2005, 2006 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the terms |
| // of the GNU General Public License as published by the Free Software |
| // Foundation; either version 2, or (at your option) any later |
| // version. |
| |
| // This library is distributed in the hope that it will be useful, but |
| // WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| // General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License |
| // along with this library; see the file COPYING. If not, write to |
| // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, |
| // MA 02111-1307, USA. |
| |
| // As a special exception, you may use this file as part of a free |
| // software library without restriction. Specifically, if other files |
| // instantiate templates or use macros or inline functions from this |
| // file, or you compile this file and link it with other files to |
| // produce an executable, this file does not by itself cause the |
| // resulting executable to be covered by the GNU General Public |
| // License. This exception does not however invalidate any other |
| // reasons why the executable file might be covered by the GNU General |
| // Public License. |
| |
| // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. |
| |
| // Permission to use, copy, modify, sell, and distribute this software |
| // is hereby granted without fee, provided that the above copyright |
| // notice appears in all copies, and that both that copyright notice |
| // and this permission notice appear in supporting documentation. None |
| // of the above authors, nor IBM Haifa Research Laboratories, make any |
| // representation about the suitability of this software for any |
| // purpose. It is provided "as is" without express or implied |
| // warranty. |
| |
| /** |
| * @file cond_dealtor.hpp |
| * Contains a conditional deallocator. |
| */ |
| |
| #ifndef PB_DS_COND_DEALTOR_HPP |
| #define PB_DS_COND_DEALTOR_HPP |
| |
| namespace pb_ds |
| { |
| |
| namespace detail |
| { |
| |
| #define PB_DS_COND_DEALTOR_CLASS_T_DEC \ |
| template<typename Entry, class Allocator> |
| |
| #define PB_DS_COND_DEALTOR_CLASS_C_DEC \ |
| cond_dealtor< \ |
| Entry, \ |
| Allocator> |
| |
| template<typename Entry, class Allocator> |
| class cond_dealtor |
| { |
| public: |
| typedef |
| typename Allocator::template rebind<Entry>::other |
| entry_allocator; |
| |
| typedef typename entry_allocator::pointer entry_pointer; |
| |
| public: |
| inline |
| cond_dealtor(entry_pointer p_e); |
| |
| inline |
| ~cond_dealtor(); |
| |
| inline void |
| set_no_action(); |
| |
| private: |
| entry_pointer m_p_e; |
| |
| bool m_no_action_destructor; |
| |
| static entry_allocator s_alloc; |
| }; |
| |
| PB_DS_COND_DEALTOR_CLASS_T_DEC |
| typename PB_DS_COND_DEALTOR_CLASS_C_DEC::entry_allocator |
| PB_DS_COND_DEALTOR_CLASS_C_DEC::s_alloc; |
| |
| PB_DS_COND_DEALTOR_CLASS_T_DEC |
| inline |
| PB_DS_COND_DEALTOR_CLASS_C_DEC:: |
| cond_dealtor(entry_pointer p_e) : |
| m_p_e(p_e), |
| m_no_action_destructor(false) |
| { } |
| |
| PB_DS_COND_DEALTOR_CLASS_T_DEC |
| inline void |
| PB_DS_COND_DEALTOR_CLASS_C_DEC:: |
| set_no_action() |
| { |
| m_no_action_destructor = true; |
| } |
| |
| PB_DS_COND_DEALTOR_CLASS_T_DEC |
| inline |
| PB_DS_COND_DEALTOR_CLASS_C_DEC:: |
| ~cond_dealtor() |
| { |
| if (m_no_action_destructor) |
| return; |
| |
| s_alloc.deallocate(m_p_e, 1); |
| } |
| |
| #undef PB_DS_COND_DEALTOR_CLASS_T_DEC |
| #undef PB_DS_COND_DEALTOR_CLASS_C_DEC |
| |
| } // namespace detail |
| |
| } // namespace pb_ds |
| |
| #endif // #ifndef PB_DS_COND_DEALTOR_HPP |
| |