1 | /* heap.inl |
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2 | * |
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3 | * This file contains the static inline 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, 1990, 1991, 1992, 1993, 1994. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * All rights assigned to U.S. Government, 1994. |
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9 | * |
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10 | * This material may be reproduced by or for the U.S. Government pursuant |
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11 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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12 | * notice must appear in all copies of this file and its derivatives. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #ifndef __HEAP_inl |
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18 | #define __HEAP_inl |
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19 | |
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20 | #include <rtems/core/address.h> |
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21 | |
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22 | /*PAGE |
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23 | * |
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24 | * _Heap_Head |
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25 | * |
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26 | */ |
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27 | |
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28 | STATIC INLINE Heap_Block *_Heap_Head ( |
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29 | Heap_Control *the_heap |
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30 | ) |
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31 | { |
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32 | return (Heap_Block *)&the_heap->start; |
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33 | } |
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34 | |
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35 | /*PAGE |
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36 | * |
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37 | * _Heap_Tail |
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38 | * |
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39 | */ |
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40 | |
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41 | STATIC INLINE Heap_Block *_Heap_Tail ( |
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42 | Heap_Control *the_heap |
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43 | ) |
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44 | { |
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45 | return (Heap_Block *)&the_heap->final; |
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46 | } |
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47 | |
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48 | /*PAGE |
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49 | * |
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50 | * _Heap_Previous_block |
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51 | * |
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52 | */ |
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53 | |
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54 | STATIC INLINE Heap_Block *_Heap_Previous_block ( |
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55 | Heap_Block *the_block |
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56 | ) |
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57 | { |
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58 | return (Heap_Block *) _Addresses_Subtract_offset( |
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59 | (void *)the_block, |
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60 | the_block->back_flag & ~ HEAP_BLOCK_USED |
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61 | ); |
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62 | } |
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63 | |
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64 | /*PAGE |
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65 | * |
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66 | * _Heap_Next_block |
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67 | * |
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68 | * NOTE: Next_block assumes that the block is free. |
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69 | */ |
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70 | |
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71 | STATIC INLINE Heap_Block *_Heap_Next_block ( |
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72 | Heap_Block *the_block |
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73 | ) |
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74 | { |
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75 | return (Heap_Block *) _Addresses_Add_offset( |
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76 | (void *)the_block, |
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77 | the_block->front_flag & ~ HEAP_BLOCK_USED |
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78 | ); |
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79 | } |
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80 | |
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81 | /*PAGE |
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82 | * |
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83 | * _Heap_Block_at |
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84 | * |
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85 | */ |
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86 | |
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87 | STATIC INLINE Heap_Block *_Heap_Block_at( |
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88 | void *base, |
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89 | unsigned32 offset |
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90 | ) |
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91 | { |
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92 | return (Heap_Block *) _Addresses_Add_offset( (void *)base, offset ); |
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93 | } |
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94 | |
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95 | /*PAGE |
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96 | * |
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97 | * _Heap_User_Block_at |
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98 | * |
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99 | */ |
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100 | |
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101 | STATIC INLINE Heap_Block *_Heap_User_Block_at( |
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102 | void *base |
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103 | ) |
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104 | { |
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105 | unsigned32 offset; |
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106 | |
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107 | offset = *(((unsigned32 *) base) - 1); |
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108 | return _Heap_Block_at( base, -offset + -HEAP_BLOCK_USED_OVERHEAD); |
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109 | } |
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110 | |
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111 | /*PAGE |
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112 | * |
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113 | * _Heap_Is_previous_block_free |
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114 | * |
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115 | */ |
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116 | |
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117 | STATIC INLINE boolean _Heap_Is_previous_block_free ( |
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118 | Heap_Block *the_block |
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119 | ) |
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120 | { |
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121 | return !(the_block->back_flag & HEAP_BLOCK_USED); |
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122 | } |
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123 | |
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124 | /*PAGE |
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125 | * |
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126 | * _Heap_Is_block_free |
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127 | * |
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128 | */ |
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129 | |
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130 | STATIC INLINE boolean _Heap_Is_block_free ( |
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131 | Heap_Block *the_block |
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132 | ) |
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133 | { |
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134 | return !(the_block->front_flag & HEAP_BLOCK_USED); |
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135 | } |
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136 | |
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137 | /*PAGE |
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138 | * |
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139 | * _Heap_Is_block_used |
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140 | * |
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141 | */ |
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142 | |
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143 | STATIC INLINE boolean _Heap_Is_block_used ( |
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144 | Heap_Block *the_block |
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145 | ) |
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146 | { |
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147 | return (the_block->front_flag & HEAP_BLOCK_USED); |
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148 | } |
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149 | |
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150 | /*PAGE |
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151 | * |
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152 | * _Heap_Block_size |
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153 | * |
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154 | */ |
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155 | |
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156 | STATIC INLINE unsigned32 _Heap_Block_size ( |
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157 | Heap_Block *the_block |
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158 | ) |
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159 | { |
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160 | return (the_block->front_flag & ~HEAP_BLOCK_USED); |
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161 | } |
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162 | |
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163 | /*PAGE |
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164 | * |
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165 | * _Heap_Start_of_user_area |
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166 | * |
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167 | */ |
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168 | |
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169 | STATIC INLINE void *_Heap_Start_of_user_area ( |
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170 | Heap_Block *the_block |
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171 | ) |
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172 | { |
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173 | return (void *) &the_block->next; |
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174 | } |
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175 | |
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176 | /*PAGE |
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177 | * |
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178 | * _Heap_Is_block_in |
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179 | * |
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180 | */ |
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181 | |
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182 | STATIC INLINE boolean _Heap_Is_block_in ( |
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183 | Heap_Control *the_heap, |
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184 | Heap_Block *the_block |
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185 | ) |
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186 | { |
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187 | return _Addresses_Is_in_range( the_block, the_heap->start, the_heap->final ); |
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188 | } |
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189 | |
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190 | /*PAGE |
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191 | * |
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192 | * _Heap_Is_page_size_valid |
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193 | * |
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194 | */ |
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195 | |
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196 | STATIC INLINE boolean _Heap_Is_page_size_valid( |
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197 | unsigned32 page_size |
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198 | ) |
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199 | { |
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200 | return ((page_size != 0) && |
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201 | ((page_size % CPU_HEAP_ALIGNMENT) == 0)); |
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202 | } |
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203 | |
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204 | /*PAGE |
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205 | * |
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206 | * _Heap_Build_flag |
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207 | * |
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208 | */ |
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209 | |
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210 | STATIC INLINE unsigned32 _Heap_Build_flag ( |
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211 | unsigned32 size, |
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212 | unsigned32 in_use_flag |
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213 | ) |
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214 | { |
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215 | return size | in_use_flag; |
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216 | } |
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217 | |
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218 | #endif |
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219 | /* end of include file */ |
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