release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/arm-brcm-linux-uclibcgnueabi/include/c++/4.5.3/ext/pb_ds/detail/cond_dealtor.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2009 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 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
  47   namespace detail
  48   {
  49
  50 #define PB_DS_COND_DEALTOR_CLASS_T_DEC          \
  51     template<typename Entry, class Allocator>
  52
  53 #define PB_DS_COND_DEALTOR_CLASS_C_DEC                          \
  54     cond_dealtor<                                               \
  55                                                 Entry,          \
  56                                                 Allocator>
  57
  58     template<typename Entry, class Allocator>
  59     class cond_dealtor
  60     {
  61     public:
  62       typedef
  63       typename Allocator::template rebind<Entry>::other
  64       entry_allocator;
  65
  66       typedef typename entry_allocator::pointer entry_pointer;
  67
  68     public:
  69       inline
  70       cond_dealtor(entry_pointer p_e);
  71
  72       inline
  73       ~cond_dealtor();
  74
  75       inline void
  76       set_no_action();
  77
  78     private:
  79       entry_pointer m_p_e;
  80
  81       bool m_no_action_destructor;
  82
  83       static entry_allocator s_alloc;
  84     };
  85
  86     PB_DS_COND_DEALTOR_CLASS_T_DEC
  87     typename PB_DS_COND_DEALTOR_CLASS_C_DEC::entry_allocator
  88     PB_DS_COND_DEALTOR_CLASS_C_DEC::s_alloc;
  89
  90     PB_DS_COND_DEALTOR_CLASS_T_DEC
  91     inline
  92     PB_DS_COND_DEALTOR_CLASS_C_DEC::
  93     cond_dealtor(entry_pointer p_e) :
  94       m_p_e(p_e),
  95       m_no_action_destructor(false)
  96     { }
  97
  98     PB_DS_COND_DEALTOR_CLASS_T_DEC
  99     inline void
 100     PB_DS_COND_DEALTOR_CLASS_C_DEC::
 101     set_no_action()
 102     {
 103       m_no_action_destructor = true;
 104     }
 105
 106     PB_DS_COND_DEALTOR_CLASS_T_DEC
 107     inline
 108     PB_DS_COND_DEALTOR_CLASS_C_DEC::
 109     ~cond_dealtor()
 110     {
 111       if (m_no_action_destructor)
 112         return;
 113
 114       s_alloc.deallocate(m_p_e, 1);
 115     }
 116
 117 #undef PB_DS_COND_DEALTOR_CLASS_T_DEC
 118 #undef PB_DS_COND_DEALTOR_CLASS_C_DEC
 119
 120   } // namespace detail
 121
 122 } // namespace __gnu_pbds
 123
 124 #endif // #ifndef PB_DS_COND_DEALTOR_HPP
 125