Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* ftlru.c */ |
| 4 | /* */ |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 5 | /* Simple LRU list-cache (body). */ |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 6 | /* */ |
Werner Lemberg | 415235d | 2001-06-28 17:49:10 +0000 | [diff] [blame] | 7 | /* Copyright 2000-2001 by */ |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
| 9 | /* */ |
| 10 | /* This file is part of the FreeType project, and may only be used, */ |
| 11 | /* modified, and distributed under the terms of the FreeType project */ |
| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
| 13 | /* this file you indicate that you have read the license and */ |
| 14 | /* understand and accept it fully. */ |
| 15 | /* */ |
| 16 | /***************************************************************************/ |
| 17 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 18 | |
| 19 | #include <ft2build.h> |
| 20 | #include FT_CACHE_H |
| 21 | #include FT_CACHE_INTERNAL_LRU_H |
| 22 | #include FT_LIST_H |
| 23 | #include FT_INTERNAL_OBJECTS_H |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 24 | |
Werner Lemberg | 1f7f0e8 | 2001-06-06 17:30:41 +0000 | [diff] [blame] | 25 | #include "ftcerror.h" |
| 26 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 27 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 28 | static void |
| 29 | lru_build_free_list( FT_LruNode nodes, |
| 30 | FT_UInt count, |
| 31 | FT_List free_list ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 32 | { |
| 33 | FT_LruNode node = nodes; |
| 34 | FT_LruNode limit = node + count; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 35 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 36 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 37 | free_list->head = free_list->tail = 0; |
| 38 | for ( ; node < limit; node++ ) |
| 39 | FT_List_Add( free_list, (FT_ListNode)node ); |
| 40 | } |
| 41 | |
| 42 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 43 | FT_EXPORT_DEF( FT_Error ) |
| 44 | FT_Lru_New( const FT_Lru_Class* clazz, |
| 45 | FT_UInt max_elements, |
| 46 | FT_Pointer user_data, |
| 47 | FT_Memory memory, |
| 48 | FT_Bool pre_alloc, |
| 49 | FT_Lru *anlru ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 50 | { |
| 51 | FT_Error error; |
| 52 | FT_Lru lru; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 53 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 54 | |
Werner Lemberg | 4b68007 | 2000-11-07 06:30:29 +0000 | [diff] [blame] | 55 | if ( !anlru ) |
Werner Lemberg | 1f7f0e8 | 2001-06-06 17:30:41 +0000 | [diff] [blame] | 56 | return FTC_Err_Invalid_Argument; |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 57 | |
Werner Lemberg | 4b68007 | 2000-11-07 06:30:29 +0000 | [diff] [blame] | 58 | *anlru = 0; |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 59 | if ( !ALLOC( lru, sizeof ( *lru ) ) ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 60 | { |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 61 | if ( pre_alloc ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 62 | { |
| 63 | /* allocate static array of lru list nodes */ |
| 64 | if ( ALLOC_ARRAY( lru->nodes, max_elements, FT_LruNodeRec ) ) |
| 65 | { |
| 66 | FREE( lru ); |
| 67 | goto Exit; |
| 68 | } |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 69 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 70 | /* build the `free_nodes' list from the array */ |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 71 | lru_build_free_list( lru->nodes, max_elements, &lru->free_nodes ); |
| 72 | } |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 73 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 74 | /* initialize common fields */ |
| 75 | lru->clazz = (FT_Lru_Class*)clazz; |
| 76 | lru->max_elements = max_elements; |
| 77 | lru->memory = memory; |
David Turner | 3b2c50e | 2000-08-23 21:11:13 +0000 | [diff] [blame] | 78 | lru->user_data = user_data; |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 79 | |
Werner Lemberg | 4b68007 | 2000-11-07 06:30:29 +0000 | [diff] [blame] | 80 | *anlru = lru; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 81 | } |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 82 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 83 | Exit: |
| 84 | return error; |
| 85 | } |
| 86 | |
| 87 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 88 | FT_EXPORT_DEF( void ) |
| 89 | FT_Lru_Reset( FT_Lru lru ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 90 | { |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 91 | FT_ListNode node; |
| 92 | FT_Lru_Class* clazz; |
| 93 | FT_Memory memory; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 94 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 95 | |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 96 | if ( !lru ) |
| 97 | return; |
| 98 | |
| 99 | node = lru->elements.head; |
| 100 | clazz = lru->clazz; |
| 101 | memory = lru->memory; |
| 102 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 103 | while ( node ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 104 | { |
| 105 | FT_ListNode next = node->next; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 106 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 107 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 108 | clazz->done_element( lru, (FT_LruNode)node ); |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 109 | if ( !lru->nodes ) |
| 110 | FREE( node ); |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 111 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 112 | node = next; |
| 113 | } |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 114 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 115 | /* rebuild free list if necessary */ |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 116 | if ( lru->nodes ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 117 | lru_build_free_list( lru->nodes, lru->max_elements, &lru->free_nodes ); |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 118 | |
| 119 | lru->elements.head = lru->elements.tail = 0; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 120 | lru->num_elements = 0; |
| 121 | } |
| 122 | |
| 123 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 124 | FT_EXPORT_DEF( void ) |
| 125 | FT_Lru_Done( FT_Lru lru ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 126 | { |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 127 | FT_Memory memory; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 128 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 129 | |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 130 | if ( !lru ) |
| 131 | return; |
| 132 | |
| 133 | memory = lru->memory; |
| 134 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 135 | FT_Lru_Reset( lru ); |
David Turner | 5084094 | 2000-12-06 18:02:01 +0000 | [diff] [blame] | 136 | |
| 137 | FREE( lru->nodes ); |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 138 | FREE( lru ); |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 142 | FT_EXPORT_DEF( FT_Error ) |
| 143 | FT_Lru_Lookup_Node( FT_Lru lru, |
| 144 | FT_LruKey key, |
| 145 | FT_LruNode *anode ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 146 | { |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 147 | FT_Error error = 0; |
| 148 | FT_ListNode node; |
| 149 | FT_Lru_Class* clazz; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 150 | FT_LruNode found = 0; |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 151 | FT_Memory memory; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 152 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 153 | |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 154 | if ( !lru || !key || !anode ) |
Werner Lemberg | 1f7f0e8 | 2001-06-06 17:30:41 +0000 | [diff] [blame] | 155 | return FTC_Err_Invalid_Argument; |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 156 | |
| 157 | node = lru->elements.head; |
| 158 | clazz = lru->clazz; |
| 159 | memory = lru->memory; |
| 160 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 161 | if ( clazz->compare_element ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 162 | { |
| 163 | for ( ; node; node = node->next ) |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 164 | if ( clazz->compare_element( (FT_LruNode)node, key ) ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 165 | { |
| 166 | found = (FT_LruNode)node; |
| 167 | break; |
| 168 | } |
| 169 | } |
| 170 | else |
| 171 | { |
| 172 | for ( ; node; node = node->next ) |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 173 | if ( ((FT_LruNode)node)->key == key ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 174 | { |
| 175 | found = (FT_LruNode)node; |
| 176 | break; |
| 177 | } |
| 178 | } |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 179 | |
David Turner | 5b1e814 | 2001-10-07 11:06:07 +0000 | [diff] [blame^] | 180 | if ( found ) |
| 181 | { |
| 182 | /* move element to top of list */ |
| 183 | FT_List_Up( &lru->elements, node ); |
| 184 | } |
| 185 | else |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 186 | { |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 187 | /* we haven't found the relevant element. We will now try */ |
| 188 | /* to create a new one. */ |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 189 | if ( lru->num_elements >= lru->max_elements ) |
| 190 | { |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 191 | /* this lru list is full; we will now flush */ |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 192 | /* the oldest node */ |
| 193 | FT_LruNode lru_node; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 194 | |
| 195 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 196 | node = lru->elements.tail; |
| 197 | lru_node = (FT_LruNode)node; |
David Turner | 98d2701 | 2000-08-24 11:53:35 +0000 | [diff] [blame] | 198 | found = lru_node; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 199 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 200 | if ( clazz->flush_element ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 201 | error = clazz->flush_element( lru, lru_node, key ); |
| 202 | else |
| 203 | { |
| 204 | clazz->done_element( lru, lru_node ); |
| 205 | lru_node->key = key; |
| 206 | node->data = 0; |
| 207 | error = clazz->init_element( lru, lru_node ); |
| 208 | } |
| 209 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 210 | if ( !error ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 211 | { |
| 212 | /* now, move element to top of list */ |
| 213 | FT_List_Up( &lru->elements, node ); |
| 214 | } |
| 215 | else |
| 216 | { |
| 217 | /* in case of error, the node must be discarded */ |
| 218 | FT_List_Remove( &lru->elements, node ); |
| 219 | lru->num_elements--; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 220 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 221 | if ( lru->nodes ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 222 | FT_List_Insert( &lru->free_nodes, node ); |
| 223 | else |
| 224 | FREE( lru_node ); |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 225 | |
David Turner | 98d2701 | 2000-08-24 11:53:35 +0000 | [diff] [blame] | 226 | found = 0; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 227 | } |
| 228 | } |
| 229 | else |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 230 | { |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 231 | FT_LruNode lru_node; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 232 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 233 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 234 | /* create a new lru list node, then the element for it */ |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 235 | if ( lru->nodes ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 236 | { |
Werner Lemberg | ab85523 | 2000-10-31 22:13:54 +0000 | [diff] [blame] | 237 | node = lru->free_nodes.head; |
| 238 | lru_node = (FT_LruNode)node; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 239 | lru_node->key = key; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 240 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 241 | error = clazz->init_element( lru, lru_node ); |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 242 | if ( error ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 243 | goto Exit; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 244 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 245 | FT_List_Remove( &lru->free_nodes, node ); |
| 246 | } |
| 247 | else |
| 248 | { |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 249 | if ( ALLOC( lru_node, sizeof ( *lru_node ) ) ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 250 | goto Exit; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 251 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 252 | lru_node->key = key; |
| 253 | error = clazz->init_element( lru, lru_node ); |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 254 | if ( error ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 255 | { |
| 256 | FREE( lru_node ); |
| 257 | goto Exit; |
| 258 | } |
| 259 | } |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 260 | |
| 261 | found = lru_node; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 262 | node = (FT_ListNode)lru_node; |
| 263 | FT_List_Insert( &lru->elements, node ); |
| 264 | lru->num_elements++; |
| 265 | } |
| 266 | } |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 267 | |
| 268 | Exit: |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 269 | *anode = found; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 270 | return error; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 274 | FT_EXPORT_DEF( FT_Error ) |
| 275 | FT_Lru_Lookup( FT_Lru lru, |
| 276 | FT_LruKey key, |
| 277 | FT_Pointer *anobject ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 278 | { |
| 279 | FT_Error error; |
| 280 | FT_LruNode node; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 281 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 282 | |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 283 | /* check for valid `lru' and `key' delayed to FT_Lru_Lookup_Node() */ |
| 284 | |
Werner Lemberg | 4b68007 | 2000-11-07 06:30:29 +0000 | [diff] [blame] | 285 | if ( !anobject ) |
Werner Lemberg | 1f7f0e8 | 2001-06-06 17:30:41 +0000 | [diff] [blame] | 286 | return FTC_Err_Invalid_Argument; |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 287 | |
Werner Lemberg | 4b68007 | 2000-11-07 06:30:29 +0000 | [diff] [blame] | 288 | *anobject = 0; |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 289 | error = FT_Lru_Lookup_Node( lru, key, &node ); |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 290 | if ( !error ) |
Werner Lemberg | 4b68007 | 2000-11-07 06:30:29 +0000 | [diff] [blame] | 291 | *anobject = node->root.data; |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 292 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 293 | return error; |
| 294 | } |
| 295 | |
| 296 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 297 | FT_EXPORT_DEF( void ) |
| 298 | FT_Lru_Remove_Node( FT_Lru lru, |
| 299 | FT_LruNode node ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 300 | { |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 301 | if ( !lru || !node ) |
| 302 | return; |
| 303 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 304 | if ( lru->num_elements > 0 ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 305 | { |
| 306 | FT_List_Remove( &lru->elements, (FT_ListNode)node ); |
| 307 | lru->clazz->done_element( lru, node ); |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 308 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 309 | if ( lru->nodes ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 310 | FT_List_Insert( &lru->free_nodes, (FT_ListNode)node ); |
| 311 | else |
| 312 | { |
| 313 | FT_Memory memory = lru->memory; |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 314 | |
| 315 | |
| 316 | FREE( node ); |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 317 | } |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 318 | |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 319 | lru->num_elements--; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | |
Werner Lemberg | f814d0f | 2001-06-27 16:18:10 +0000 | [diff] [blame] | 324 | FT_EXPORT_DEF( void ) |
| 325 | FT_Lru_Remove_Selection( FT_Lru lru, |
| 326 | FT_Lru_Selector selector, |
| 327 | FT_Pointer data ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 328 | { |
Werner Lemberg | d1b7475 | 2000-08-24 16:29:15 +0000 | [diff] [blame] | 329 | if ( !lru || !selector ) |
| 330 | return; |
| 331 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 332 | if ( lru->num_elements > 0 ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 333 | { |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 334 | FT_ListNode node = lru->elements.head; |
| 335 | FT_ListNode next; |
| 336 | |
Werner Lemberg | e4b32a5 | 2000-10-31 20:42:18 +0000 | [diff] [blame] | 337 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 338 | while ( node ) |
David Turner | b466a76 | 2000-08-23 11:22:30 +0000 | [diff] [blame] | 339 | { |
| 340 | next = node->next; |
| 341 | if ( selector( lru, (FT_LruNode)node, data ) ) |
| 342 | { |
| 343 | /* remove this element from the list, and destroy it */ |
| 344 | FT_Lru_Remove_Node( lru, (FT_LruNode)node ); |
| 345 | } |
| 346 | node = next; |
| 347 | } |
| 348 | } |
| 349 | } |
| 350 | |
Werner Lemberg | 8728f29 | 2000-08-23 17:32:42 +0000 | [diff] [blame] | 351 | |
| 352 | /* END */ |