1 : /*
2 : +----------------------------------------------------------------------+
3 : | Zend Engine |
4 : +----------------------------------------------------------------------+
5 : | Copyright (c) 1998-2007 Zend Technologies Ltd. (http://www.zend.com) |
6 : +----------------------------------------------------------------------+
7 : | This source file is subject to version 2.00 of the Zend license, |
8 : | that is bundled with this package in the file LICENSE, and is |
9 : | available through the world-wide-web at the following url: |
10 : | http://www.zend.com/license/2_00.txt. |
11 : | If you did not receive a copy of the Zend license and are unable to |
12 : | obtain it through the world-wide-web, please send a note to |
13 : | license@zend.com so we can mail you a copy immediately. |
14 : +----------------------------------------------------------------------+
15 : | Authors: Andi Gutmans <andi@zend.com> |
16 : | Zeev Suraski <zeev@zend.com> |
17 : +----------------------------------------------------------------------+
18 : */
19 :
20 : /* $Id: zend_list.c,v 1.66.2.1.2.1 2007/01/01 09:35:46 sebastian Exp $ */
21 :
22 : /* resource lists */
23 :
24 : #include "zend.h"
25 : #include "zend_list.h"
26 : #include "zend_API.h"
27 : #include "zend_globals.h"
28 :
29 : ZEND_API int le_index_ptr;
30 :
31 : /* true global */
32 : static HashTable list_destructors;
33 :
34 :
35 : ZEND_API int zend_list_insert(void *ptr, int type)
36 1781 : {
37 : int index;
38 : zend_rsrc_list_entry le;
39 : TSRMLS_FETCH();
40 :
41 1781 : le.ptr=ptr;
42 1781 : le.type=type;
43 1781 : le.refcount=1;
44 :
45 1781 : index = zend_hash_next_free_element(&EG(regular_list));
46 :
47 1781 : zend_hash_index_update(&EG(regular_list), index, (void *) &le, sizeof(zend_rsrc_list_entry), NULL);
48 1781 : return index;
49 : }
50 :
51 : ZEND_API int _zend_list_delete(int id TSRMLS_DC)
52 3064 : {
53 : zend_rsrc_list_entry *le;
54 :
55 3064 : if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
56 : /* printf("del(%d): %d->%d\n", id, le->refcount, le->refcount-1); */
57 1842 : if (--le->refcount<=0) {
58 1663 : return zend_hash_index_del(&EG(regular_list), id);
59 : } else {
60 179 : return SUCCESS;
61 : }
62 : } else {
63 1222 : return FAILURE;
64 : }
65 : }
66 :
67 :
68 : ZEND_API void *_zend_list_find(int id, int *type TSRMLS_DC)
69 28891 : {
70 : zend_rsrc_list_entry *le;
71 :
72 28891 : if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
73 23497 : *type = le->type;
74 23497 : return le->ptr;
75 : } else {
76 5394 : *type = -1;
77 5394 : return NULL;
78 : }
79 : }
80 :
81 : ZEND_API int _zend_list_addref(int id TSRMLS_DC)
82 179 : {
83 : zend_rsrc_list_entry *le;
84 :
85 179 : if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
86 : /* printf("add(%d): %d->%d\n", id, le->refcount, le->refcount+1); */
87 179 : le->refcount++;
88 179 : return SUCCESS;
89 : } else {
90 0 : return FAILURE;
91 : }
92 : }
93 :
94 :
95 : ZEND_API int zend_register_resource(zval *rsrc_result, void *rsrc_pointer, int rsrc_type)
96 1781 : {
97 : int rsrc_id;
98 :
99 1781 : rsrc_id = zend_list_insert(rsrc_pointer, rsrc_type);
100 :
101 1781 : if (rsrc_result) {
102 216 : rsrc_result->value.lval = rsrc_id;
103 216 : rsrc_result->type = IS_RESOURCE;
104 : }
105 :
106 1781 : return rsrc_id;
107 : }
108 :
109 :
110 : ZEND_API void *zend_fetch_resource(zval **passed_id TSRMLS_DC, int default_id, char *resource_type_name, int *found_resource_type, int num_resource_types, ...)
111 28891 : {
112 : int id;
113 : int actual_resource_type;
114 : void *resource;
115 : va_list resource_types;
116 : int i;
117 : char *space;
118 : char *class_name;
119 :
120 28891 : if (default_id==-1) { /* use id */
121 28891 : if (!passed_id) {
122 0 : if (resource_type_name) {
123 0 : class_name = get_active_class_name(&space TSRMLS_CC);
124 0 : zend_error(E_WARNING, "%s%s%s(): no %s resource supplied", class_name, space, get_active_function_name(TSRMLS_C), resource_type_name);
125 : }
126 0 : return NULL;
127 28891 : } else if ((*passed_id)->type != IS_RESOURCE) {
128 0 : if (resource_type_name) {
129 0 : class_name = get_active_class_name(&space TSRMLS_CC);
130 0 : zend_error(E_WARNING, "%s%s%s(): supplied argument is not a valid %s resource", class_name, space, get_active_function_name(TSRMLS_C), resource_type_name);
131 : }
132 0 : return NULL;
133 : }
134 28891 : id = (*passed_id)->value.lval;
135 : } else {
136 0 : id = default_id;
137 : }
138 :
139 28891 : resource = zend_list_find(id, &actual_resource_type);
140 28891 : if (!resource) {
141 5394 : if (resource_type_name) {
142 5394 : class_name = get_active_class_name(&space TSRMLS_CC);
143 5394 : zend_error(E_WARNING, "%s%s%s(): %d is not a valid %s resource", class_name, space, get_active_function_name(TSRMLS_C), id, resource_type_name);
144 : }
145 5394 : return NULL;
146 : }
147 :
148 23497 : va_start(resource_types, num_resource_types);
149 23497 : for (i=0; i<num_resource_types; i++) {
150 23497 : if (actual_resource_type == va_arg(resource_types, int)) {
151 23497 : va_end(resource_types);
152 23497 : if (found_resource_type) {
153 0 : *found_resource_type = actual_resource_type;
154 : }
155 23497 : return resource;
156 : }
157 : }
158 0 : va_end(resource_types);
159 :
160 0 : if (resource_type_name) {
161 0 : class_name = get_active_class_name(&space TSRMLS_CC);
162 0 : zend_error(E_WARNING, "%s%s%s(): supplied resource is not a valid %s resource", class_name, space, get_active_function_name(TSRMLS_C), resource_type_name);
163 : }
164 :
165 0 : return NULL;
166 : }
167 :
168 :
169 : void list_entry_destructor(void *ptr)
170 1781 : {
171 1781 : zend_rsrc_list_entry *le = (zend_rsrc_list_entry *) ptr;
172 : zend_rsrc_list_dtors_entry *ld;
173 : TSRMLS_FETCH();
174 :
175 1781 : if (zend_hash_index_find(&list_destructors, le->type, (void **) &ld)==SUCCESS) {
176 1781 : switch (ld->type) {
177 : case ZEND_RESOURCE_LIST_TYPE_STD:
178 0 : if (ld->list_dtor) {
179 0 : (ld->list_dtor)(le->ptr);
180 : }
181 0 : break;
182 : case ZEND_RESOURCE_LIST_TYPE_EX:
183 1781 : if (ld->list_dtor_ex) {
184 1768 : ld->list_dtor_ex(le TSRMLS_CC);
185 : }
186 : break;
187 : EMPTY_SWITCH_DEFAULT_CASE()
188 : }
189 : } else {
190 0 : zend_error(E_WARNING,"Unknown list entry type in request shutdown (%d)", le->type);
191 : }
192 1781 : }
193 :
194 :
195 : void plist_entry_destructor(void *ptr)
196 0 : {
197 0 : zend_rsrc_list_entry *le = (zend_rsrc_list_entry *) ptr;
198 : zend_rsrc_list_dtors_entry *ld;
199 : TSRMLS_FETCH();
200 :
201 0 : if (zend_hash_index_find(&list_destructors, le->type, (void **) &ld)==SUCCESS) {
202 0 : switch (ld->type) {
203 : case ZEND_RESOURCE_LIST_TYPE_STD:
204 0 : if (ld->plist_dtor) {
205 0 : (ld->plist_dtor)(le->ptr);
206 : }
207 0 : break;
208 : case ZEND_RESOURCE_LIST_TYPE_EX:
209 0 : if (ld->plist_dtor_ex) {
210 0 : ld->plist_dtor_ex(le TSRMLS_CC);
211 : }
212 : break;
213 : EMPTY_SWITCH_DEFAULT_CASE()
214 : }
215 : } else {
216 0 : zend_error(E_WARNING,"Unknown persistent list entry type in module shutdown (%d)", le->type);
217 : }
218 0 : }
219 :
220 :
221 : int zend_init_rsrc_list(TSRMLS_D)
222 219 : {
223 219 : if (zend_hash_init(&EG(regular_list), 0, NULL, list_entry_destructor, 0)==SUCCESS) {
224 219 : EG(regular_list).nNextFreeElement=1; /* we don't want resource id 0 */
225 219 : return SUCCESS;
226 : } else {
227 0 : return FAILURE;
228 : }
229 : }
230 :
231 :
232 : int zend_init_rsrc_plist(TSRMLS_D)
233 220 : {
234 220 : return zend_hash_init_ex(&EG(persistent_list), 0, NULL, plist_entry_destructor, 1, 0);
235 : }
236 :
237 :
238 : void zend_destroy_rsrc_list(HashTable *ht TSRMLS_DC)
239 438 : {
240 438 : zend_hash_graceful_reverse_destroy(ht);
241 438 : }
242 :
243 : static int clean_module_resource(zend_rsrc_list_entry *le, int *resource_id TSRMLS_DC)
244 0 : {
245 0 : if (le->type == *resource_id) {
246 0 : return 1;
247 : } else {
248 0 : return 0;
249 : }
250 : }
251 :
252 :
253 : static int zend_clean_module_rsrc_dtors_cb(zend_rsrc_list_dtors_entry *ld, int *module_number TSRMLS_DC)
254 0 : {
255 0 : if (ld->module_number == *module_number) {
256 0 : zend_hash_apply_with_argument(&EG(regular_list), (apply_func_arg_t) clean_module_resource, (void *) &(ld->resource_id) TSRMLS_CC);
257 0 : zend_hash_apply_with_argument(&EG(persistent_list), (apply_func_arg_t) clean_module_resource, (void *) &(ld->resource_id) TSRMLS_CC);
258 0 : return 1;
259 : } else {
260 0 : return 0;
261 : }
262 : }
263 :
264 :
265 : void zend_clean_module_rsrc_dtors(int module_number TSRMLS_DC)
266 0 : {
267 0 : zend_hash_apply_with_argument(&list_destructors, (apply_func_arg_t) zend_clean_module_rsrc_dtors_cb, (void *) &module_number TSRMLS_CC);
268 0 : }
269 :
270 :
271 : ZEND_API int zend_register_list_destructors(void (*ld)(void *), void (*pld)(void *), int module_number)
272 0 : {
273 : zend_rsrc_list_dtors_entry lde;
274 :
275 : #if 0
276 : printf("Registering destructors %d for module %d\n", list_destructors.nNextFreeElement, module_number);
277 : #endif
278 :
279 0 : lde.list_dtor=(void (*)(void *)) ld;
280 0 : lde.plist_dtor=(void (*)(void *)) pld;
281 0 : lde.list_dtor_ex = lde.plist_dtor_ex = NULL;
282 0 : lde.module_number = module_number;
283 0 : lde.resource_id = list_destructors.nNextFreeElement;
284 0 : lde.type = ZEND_RESOURCE_LIST_TYPE_STD;
285 0 : lde.type_name = NULL;
286 :
287 0 : if (zend_hash_next_index_insert(&list_destructors, (void *) &lde, sizeof(zend_rsrc_list_dtors_entry), NULL)==FAILURE) {
288 0 : return FAILURE;
289 : }
290 0 : return list_destructors.nNextFreeElement-1;
291 : }
292 :
293 :
294 : ZEND_API int zend_register_list_destructors_ex(rsrc_dtor_func_t ld, rsrc_dtor_func_t pld, char *type_name, int module_number)
295 2420 : {
296 : zend_rsrc_list_dtors_entry lde;
297 :
298 : #if 0
299 : printf("Registering destructors %d for module %d\n", list_destructors.nNextFreeElement, module_number);
300 : #endif
301 :
302 2420 : lde.list_dtor = NULL;
303 2420 : lde.plist_dtor = NULL;
304 2420 : lde.list_dtor_ex = ld;
305 2420 : lde.plist_dtor_ex = pld;
306 2420 : lde.module_number = module_number;
307 2420 : lde.resource_id = list_destructors.nNextFreeElement;
308 2420 : lde.type = ZEND_RESOURCE_LIST_TYPE_EX;
309 2420 : lde.type_name = type_name;
310 :
311 2420 : if (zend_hash_next_index_insert(&list_destructors, (void *) &lde, sizeof(zend_rsrc_list_dtors_entry), NULL)==FAILURE) {
312 0 : return FAILURE;
313 : }
314 2420 : return list_destructors.nNextFreeElement-1;
315 : }
316 :
317 : ZEND_API int zend_fetch_list_dtor_id(char *type_name)
318 0 : {
319 : zend_rsrc_list_dtors_entry *lde;
320 : HashPosition pos;
321 :
322 0 : zend_hash_internal_pointer_reset_ex(&list_destructors, &pos);
323 0 : while (zend_hash_get_current_data_ex(&list_destructors, (void **)&lde, &pos) == SUCCESS) {
324 0 : if (lde->type_name && (strcmp(type_name, lde->type_name) == 0)) {
325 : #if 0
326 : printf("Found resource id %d for resource type %s\n", (*lde).resource_id, type_name);
327 : #endif
328 0 : return lde->resource_id;
329 : }
330 0 : zend_hash_move_forward_ex(&list_destructors, &pos);
331 : }
332 :
333 0 : return 0;
334 : }
335 :
336 : int zend_init_rsrc_list_dtors(void)
337 220 : {
338 : int retval;
339 :
340 220 : retval = zend_hash_init(&list_destructors, 50, NULL, NULL, 1);
341 220 : list_destructors.nNextFreeElement=1; /* we don't want resource type 0 */
342 :
343 220 : return retval;
344 : }
345 :
346 :
347 : void zend_destroy_rsrc_list_dtors(void)
348 219 : {
349 219 : zend_hash_destroy(&list_destructors);
350 219 : }
351 :
352 :
353 : char *zend_rsrc_list_get_rsrc_type(int resource TSRMLS_DC)
354 0 : {
355 : zend_rsrc_list_dtors_entry *lde;
356 : int rsrc_type;
357 :
358 0 : if (!zend_list_find(resource, &rsrc_type))
359 0 : return NULL;
360 :
361 0 : if (zend_hash_index_find(&list_destructors, rsrc_type, (void **) &lde)==SUCCESS) {
362 0 : return lde->type_name;
363 : } else {
364 0 : return NULL;
365 : }
366 : }
367 :
368 : /*
369 : * Local variables:
370 : * tab-width: 4
371 : * c-basic-offset: 4
372 : * indent-tabs-mode: t
373 : * End:
374 : */
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