libstdc++
|
00001 // -*- C++ -*- 00002 00003 // Copyright (C) 2005, 2006, 2009, 2011 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the terms 00007 // of the GNU General Public License as published by the Free Software 00008 // Foundation; either version 3, or (at your option) any later 00009 // version. 00010 00011 // This library is distributed in the hope that it will be useful, but 00012 // WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 // General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 00026 00027 // Permission to use, copy, modify, sell, and distribute this software 00028 // is hereby granted without fee, provided that the above copyright 00029 // notice appears in all copies, and that both that copyright notice 00030 // and this permission notice appear in supporting documentation. None 00031 // of the above authors, nor IBM Haifa Research Laboratories, make any 00032 // representation about the suitability of this software for any 00033 // purpose. It is provided "as is" without express or implied 00034 // warranty. 00035 00036 /** 00037 * @file detail/cond_dealtor.hpp 00038 * Contains a conditional deallocator. 00039 */ 00040 00041 #ifndef PB_DS_COND_DEALTOR_HPP 00042 #define PB_DS_COND_DEALTOR_HPP 00043 00044 namespace __gnu_pbds 00045 { 00046 namespace detail 00047 { 00048 /// Conditional deallocate constructor argument. 00049 template<typename Entry, typename _Alloc> 00050 class cond_dealtor 00051 { 00052 typedef typename _Alloc::template rebind<Entry> __rebind_e; 00053 00054 public: 00055 typedef typename __rebind_e::other entry_allocator; 00056 typedef typename entry_allocator::pointer entry_pointer; 00057 00058 cond_dealtor(entry_pointer p_e) 00059 : m_p_e(p_e), m_no_action_destructor(false) { } 00060 00061 ~cond_dealtor() 00062 { 00063 if (m_no_action_destructor) 00064 return; 00065 s_alloc.deallocate(m_p_e, 1); 00066 } 00067 00068 void 00069 set_no_action() 00070 { m_no_action_destructor = true; } 00071 00072 private: 00073 entry_pointer m_p_e; 00074 bool m_no_action_destructor; 00075 static entry_allocator s_alloc; 00076 }; 00077 00078 template<typename Entry, class _Alloc> 00079 typename cond_dealtor<Entry, _Alloc>::entry_allocator 00080 cond_dealtor<Entry, _Alloc>::s_alloc; 00081 } // namespace detail 00082 } // namespace __gnu_pbds 00083 00084 #endif // #ifndef PB_DS_COND_DEALTOR_HPP