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annotate generator/parser/rxx_allocator.h @ 414:b2a803c73b89 default tip

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Declare tabArray const.
author David Nadlinger <code@klickverbot.at>
date Fri, 06 May 2011 13:39:49 +0200
parents 09a0f1d048f2
children
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1 /****************************************************************************
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2 **
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3 ** Copyright (C) 1992-2009 Nokia. All rights reserved.
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4 ** Copyright (C) 2002-2005 Roberto Raggi <roberto@kdevelop.org>
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5 **
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6 ** This file is part of Qt Jambi.
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7 **
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8 ** Commercial Usage
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9 Licensees holding valid Qt Commercial licenses may use this file in
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10 accordance with the Qt Commercial License Agreement provided with the
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11 Software or, alternatively, in accordance with the terms contained in
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12 a written agreement between you and Nokia.
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13
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14 GNU Lesser General Public License Usage
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15 Alternatively, this file may be used under the terms of the GNU Lesser
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16 General Public License version 2.1 as published by the Free Software
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17 Foundation and appearing in the file LICENSE.LGPL included in the
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18 packaging of this file. Please review the following information to
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19 ensure the GNU Lesser General Public License version 2.1 requirements
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20 will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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21
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22 In addition, as a special exception, Nokia gives you certain
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23 additional rights. These rights are described in the Nokia Qt LGPL
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24 Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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25 package.
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26
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27 GNU General Public License Usage
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28 Alternatively, this file may be used under the terms of the GNU
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29 General Public License version 3.0 as published by the Free Software
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30 Foundation and appearing in the file LICENSE.GPL included in the
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31 packaging of this file. Please review the following information to
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32 ensure the GNU General Public License version 3.0 requirements will be
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33 met: http://www.gnu.org/copyleft/gpl.html.
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34
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35 If you are unsure which license is appropriate for your use, please
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36 contact the sales department at qt-sales@nokia.com.
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37
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38 **
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39 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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40 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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41 **
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42 ****************************************************************************/
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43
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44
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45 #ifndef RXX_ALLOCATOR_H
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46 #define RXX_ALLOCATOR_H
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47
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48 #include <cstddef>
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49 #include <cstdlib>
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50 #include <cstring>
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51 #include <memory>
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52
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53 template <class _Tp> class rxx_allocator {
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54 public:
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55 typedef _Tp value_type;
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56 typedef _Tp* pointer;
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57 typedef const _Tp* const_pointer;
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58 typedef _Tp& reference;
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59 typedef const _Tp& const_reference;
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60 typedef std::size_t size_type;
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61 typedef std::ptrdiff_t difference_type;
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62
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63 static const size_type max_block_count = size_type(-1);
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64 static const size_type _S_block_size = 1 << 16; // 64K
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65
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66 rxx_allocator() {
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67 _M_block_index = max_block_count;
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68 _M_current_index = 0;
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69 _M_storage = 0;
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70 _M_current_block = 0;
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71 }
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72
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73 ~rxx_allocator() {
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74 for (size_type index = 0; index < _M_block_index + 1; ++index)
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75 delete[] _M_storage[index];
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76
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77 ::free(_M_storage);
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78 }
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79
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80 pointer address(reference __val) { return &__val; }
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81 const_pointer address(const_reference __val) const { return &__val; }
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82
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83 pointer allocate(size_type __n, const void* = 0) {
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84 const size_type bytes = __n * sizeof(_Tp);
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85
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86 if (_M_current_block == 0
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87 || _S_block_size < _M_current_index + bytes)
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88 {
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89 ++_M_block_index;
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90
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91 _M_storage = reinterpret_cast<char**>
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92 (::realloc(_M_storage, sizeof(char*) * (1 + _M_block_index)));
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93
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94 _M_current_block = _M_storage[_M_block_index] = reinterpret_cast<char*>
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95 (new char[_S_block_size]);
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96
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97 #if defined(RXX_ALLOCATOR_INIT_0) // ### make it a policy
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98 ::memset(_M_current_block, 0, _S_block_size);
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99 #endif
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100 _M_current_index = 0;
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101 }
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102
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103 pointer p = reinterpret_cast<pointer>
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104 (_M_current_block + _M_current_index);
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105
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106 _M_current_index += bytes;
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107
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108 return p;
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109 }
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110
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111 void deallocate(pointer __p, size_type __n) {}
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112
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113 size_type max_size() const { return size_type(-1) / sizeof(_Tp); }
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114
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115 void contruct(pointer __p, const_reference __val) { new (__p) _Tp(__val); }
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116 void destruct(pointer __p) { __p->~_Tp(); }
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117
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118 private:
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119 template <class _Tp1> struct rebind {
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120 typedef rxx_allocator<_Tp1> other;
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121 };
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122
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123 template <class _Tp1> rxx_allocator(const rxx_allocator<_Tp1> &__o) {}
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124
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125 private:
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126 size_type _M_block_index;
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127 size_type _M_current_index;
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128 char *_M_current_block;
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129 char **_M_storage;
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130 };
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131
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132 #endif // RXX_ALLOCATOR_H
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133
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134 // kate: space-indent on; indent-width 2; replace-tabs on;