LCOV - lcov.info - /usr/include/c++/4.3/bits/allocator.h

LTP GCOV extension - code coverage report
Current view: | directory - usr/include/c++/4.3/bits - allocator.h
Test: | lcov.info
Date: | 2008-08-14 |  | Instrumented lines: | 7
Code covered: | 71.4 % |  | Executed lines: | 5

           1                 : // Allocators -*- C++ -*-
           2                 :
           3                 : // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
           4                 : // Free Software Foundation, Inc.
           5                 : //
           6                 : // This file is part of the GNU ISO C++ Library.  This library is free
           7                 : // software; you can redistribute it and/or modify it under the
           8                 : // terms of the GNU General Public License as published by the
           9                 : // Free Software Foundation; either version 2, or (at your option)
          10                 : // any later version.
          11                 :
          12                 : // This library is distributed in the hope that it will be useful,
          13                 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
          14                 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
          15                 : // GNU General Public License for more details.
          16                 :
          17                 : // You should have received a copy of the GNU General Public License along
          18                 : // with this library; see the file COPYING.  If not, write to the Free
          19                 : // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
          20                 : // USA.
          21                 :
          22                 : // As a special exception, you may use this file as part of a free software
          23                 : // library without restriction.  Specifically, if other files instantiate
          24                 : // templates or use macros or inline functions from this file, or you compile
          25                 : // this file and link it with other files to produce an executable, this
          26                 : // file does not by itself cause the resulting executable to be covered by
          27                 : // the GNU General Public License.  This exception does not however
          28                 : // invalidate any other reasons why the executable file might be covered by
          29                 : // the GNU General Public License.
          30                 :
          31                 : /*
          32                 :  * Copyright (c) 1996-1997
          33                 :  * Silicon Graphics Computer Systems, Inc.
          34                 :  *
          35                 :  * Permission to use, copy, modify, distribute and sell this software
          36                 :  * and its documentation for any purpose is hereby granted without fee,
          37                 :  * provided that the above copyright notice appear in all copies and
          38                 :  * that both that copyright notice and this permission notice appear
          39                 :  * in supporting documentation.  Silicon Graphics makes no
          40                 :  * representations about the suitability of this software for any
          41                 :  * purpose.  It is provided "as is" without express or implied warranty.
          42                 :  */
          43                 :
          44                 : /** @file allocator.h
          45                 :  *  This is an internal header file, included by other library headers.
          46                 :  *  You should not attempt to use it directly.
          47                 :  */
          48                 :
          49                 : #ifndef _ALLOCATOR_H
          50                 : #define _ALLOCATOR_H 1
          51                 :
          52                 : // Define the base class to std::allocator.
          53                 : #include <bits/c++allocator.h>
          54                 :
          55                 : _GLIBCXX_BEGIN_NAMESPACE(std)
          56                 :
          57                 :   template<typename _Tp>
          58                 :     class allocator;
          59                 :
          60                 :   /// allocator<void> specialization.
          61                 :   template<>
          62                 :     class allocator<void>
          63                 :     {
          64                 :     public:
          65                 :       typedef size_t      size_type;
          66                 :       typedef ptrdiff_t   difference_type;
          67                 :       typedef void*       pointer;
          68                 :       typedef const void* const_pointer;
          69                 :       typedef void        value_type;
          70                 :
          71                 :       template<typename _Tp1>
          72                 :         struct rebind
          73                 :         { typedef allocator<_Tp1> other; };
          74                 :     };
          75                 :
          76                 :   /**
          77                 :    * @brief  The "standard" allocator, as per [20.4].
          78                 :    *
          79                 :    *  Further details:
          80                 :    *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt04ch11.html
          81                 :    */
          82                 :   template<typename _Tp>
          83                 :     class allocator: public __glibcxx_base_allocator<_Tp>
          84                 :     {
          85                 :    public:
          86                 :       typedef size_t     size_type;
          87                 :       typedef ptrdiff_t  difference_type;
          88                 :       typedef _Tp*       pointer;
          89                 :       typedef const _Tp* const_pointer;
          90                 :       typedef _Tp&       reference;
          91                 :       typedef const _Tp& const_reference;
          92                 :       typedef _Tp        value_type;
          93                 :
          94                 :       template<typename _Tp1>
          95                 :         struct rebind
          96                 :         { typedef allocator<_Tp1> other; };
          97                 :
          98          285441 :       allocator() throw() { }
          99                 :
         100          934618 :       allocator(const allocator& __a) throw()
         101          934618 :       : __glibcxx_base_allocator<_Tp>(__a) { }
         102                 :
         103                 :       template<typename _Tp1>
         104        11289504 :         allocator(const allocator<_Tp1>&) throw() { }
         105                 :
         106        12615289 :       ~allocator() throw() { }
         107                 :
         108                 :       // Inherit everything else.
         109                 :     };
         110                 :
         111                 :   template<typename _T1, typename _T2>
         112                 :     inline bool
         113                 :     operator==(const allocator<_T1>&, const allocator<_T2>&)
         114                 :     { return true; }
         115                 :
         116                 :   template<typename _Tp>
         117                 :     inline bool
         118               0 :     operator==(const allocator<_Tp>&, const allocator<_Tp>&)
         119               0 :     { return true; }
         120                 :
         121                 :   template<typename _T1, typename _T2>
         122                 :     inline bool
         123                 :     operator!=(const allocator<_T1>&, const allocator<_T2>&)
         124                 :     { return false; }
         125                 :
         126                 :   template<typename _Tp>
         127                 :     inline bool
         128                 :     operator!=(const allocator<_Tp>&, const allocator<_Tp>&)
         129                 :     { return false; }
         130                 :
         131                 :   // Inhibit implicit instantiations for required instantiations,
         132                 :   // which are defined via explicit instantiations elsewhere.
         133                 :   // NB: This syntax is a GNU extension.
         134                 : #if _GLIBCXX_EXTERN_TEMPLATE
         135                 :   extern template class allocator<char>;
         136                 :   extern template class allocator<wchar_t>;
         137                 : #endif
         138                 :
         139                 :   // Undefine.
         140                 : #undef __glibcxx_base_allocator
         141                 :
         142                 :   // To implement Option 3 of DR 431.
         143                 :   template<typename _Alloc, bool = __is_empty(_Alloc)>
         144                 :     struct __alloc_swap
         145                 :     { static void _S_do_it(_Alloc&, _Alloc&) { } };
         146                 :
         147                 :   template<typename _Alloc>
         148                 :     struct __alloc_swap<_Alloc, false>
         149                 :     {
         150                 :       static void
         151                 :       _S_do_it(_Alloc& __one, _Alloc& __two)
         152                 :       {
         153                 :         // Precondition: swappable allocators.
         154                 :         if (__one != __two)
         155                 :           swap(__one, __two);
         156                 :       }
         157                 :     };
         158                 :
         159                 :   // Optimize for stateless allocators.
         160                 :   template<typename _Alloc, bool = __is_empty(_Alloc)>
         161                 :     struct __alloc_neq
         162                 :     {
         163                 :       static bool
         164                 :       _S_do_it(const _Alloc&, const _Alloc&)
         165                 :       { return false; }
         166                 :     };
         167                 :
         168                 :   template<typename _Alloc>
         169                 :     struct __alloc_neq<_Alloc, false>
         170                 :     {
         171                 :       static bool
         172                 :       _S_do_it(const _Alloc& __one, const _Alloc& __two)
         173                 :       { return __one != __two; }
         174                 :     };
         175                 :
         176                 : _GLIBCXX_END_NAMESPACE
         177                 :
         178                 : #endif

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