1 | /* heap.inl |
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2 | * |
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3 | * This file contains the macro implementation of the inlined |
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4 | * routines from the heap handler. |
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5 | * |
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6 | * COPYRIGHT (c) 1989-1999. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.rtems.com/license/LICENSE. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #ifndef __HEAP_inl |
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17 | #define __HEAP_inl |
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18 | |
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19 | #include <rtems/score/address.h> |
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20 | |
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21 | /*PAGE |
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22 | * |
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23 | * _Heap_Head |
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24 | */ |
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25 | |
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26 | #define _Heap_Head( _the_heap ) \ |
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27 | ((Heap_Block *)&(_the_heap)->start) |
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28 | |
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29 | /*PAGE |
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30 | * |
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31 | * _Heap_Tail |
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32 | */ |
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33 | |
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34 | #define _Heap_Tail( _the_heap ) \ |
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35 | ((Heap_Block *)&(_the_heap)->final) |
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36 | |
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37 | /*PAGE |
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38 | * |
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39 | * _Heap_Previous_block |
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40 | */ |
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41 | |
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42 | #define _Heap_Previous_block( _the_block ) \ |
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43 | ( (Heap_Block *) _Addresses_Subtract_offset( \ |
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44 | (void *)(_the_block), \ |
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45 | (_the_block)->back_flag & ~ HEAP_BLOCK_USED \ |
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46 | ) \ |
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47 | ) |
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48 | |
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49 | /*PAGE |
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50 | * |
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51 | * _Heap_Next_block |
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52 | */ |
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53 | |
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54 | #define _Heap_Next_block( _the_block ) \ |
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55 | ( (Heap_Block *) _Addresses_Add_offset( \ |
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56 | (void *)(_the_block), \ |
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57 | (_the_block)->front_flag & ~ HEAP_BLOCK_USED \ |
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58 | ) \ |
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59 | ) |
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60 | |
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61 | /*PAGE |
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62 | * |
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63 | * _Heap_Block_at |
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64 | */ |
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65 | |
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66 | #define _Heap_Block_at( _base, _offset ) \ |
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67 | ( (Heap_Block *) \ |
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68 | _Addresses_Add_offset( (void *)(_base), (_offset) ) ) |
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69 | |
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70 | /*PAGE |
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71 | * |
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72 | * _Heap_User_block_at |
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73 | * |
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74 | */ |
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75 | |
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76 | #define _Heap_User_block_at( _base ) \ |
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77 | _Heap_Block_at( \ |
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78 | (_base), \ |
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79 | -*(((uint32_t *) (_base)) - 1) + -HEAP_BLOCK_USED_OVERHEAD \ |
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80 | ) |
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81 | |
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82 | /*PAGE |
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83 | * |
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84 | * _Heap_Is_previous_block_free |
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85 | */ |
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86 | |
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87 | #define _Heap_Is_previous_block_free( _the_block ) \ |
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88 | ( !((_the_block)->back_flag & HEAP_BLOCK_USED) ) |
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89 | |
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90 | /*PAGE |
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91 | * |
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92 | * _Heap_Is_block_free |
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93 | */ |
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94 | |
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95 | #define _Heap_Is_block_free( _the_block ) \ |
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96 | ( !((_the_block)->front_flag & HEAP_BLOCK_USED) ) |
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97 | |
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98 | /*PAGE |
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99 | * |
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100 | * _Heap_Is_block_used |
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101 | */ |
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102 | |
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103 | #define _Heap_Is_block_used( _the_block ) \ |
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104 | ((_the_block)->front_flag & HEAP_BLOCK_USED) |
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105 | |
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106 | /*PAGE |
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107 | * |
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108 | * _Heap_Block_size |
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109 | */ |
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110 | |
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111 | #define _Heap_Block_size( _the_block ) \ |
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112 | ((_the_block)->front_flag & ~HEAP_BLOCK_USED) |
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113 | |
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114 | /*PAGE |
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115 | * |
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116 | * _Heap_Start_of_user_area |
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117 | */ |
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118 | |
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119 | #define _Heap_Start_of_user_area( _the_block ) \ |
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120 | ((void *) &(_the_block)->next) |
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121 | |
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122 | /*PAGE |
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123 | * |
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124 | * _Heap_Is_block_in |
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125 | */ |
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126 | |
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127 | #define _Heap_Is_block_in( _the_heap, _the_block ) \ |
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128 | ( ((_the_block) >= (_the_heap)->start) && \ |
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129 | ((_the_block) <= (_the_heap)->final) ) |
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130 | |
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131 | /*PAGE |
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132 | * |
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133 | * _Heap_Is_page_size_valid |
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134 | */ |
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135 | |
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136 | #define _Heap_Is_page_size_valid( _page_size ) \ |
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137 | ( ((_page_size) != 0) && \ |
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138 | (((_page_size) % CPU_HEAP_ALIGNMENT) == 0) ) |
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139 | |
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140 | /*PAGE |
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141 | * |
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142 | * _Heap_Build_flag |
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143 | */ |
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144 | |
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145 | #define _Heap_Build_flag( _size, _in_use_flag ) \ |
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146 | ( (_size) | (_in_use_flag)) |
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147 | |
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148 | #endif |
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149 | /* end of include file */ |
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