1: /*
2: +----------------------------------------------------------------------+
3: | Zend Engine |
4: +----------------------------------------------------------------------+
5: | Copyright (c) 1998-2012 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 1.1.1.2.2.1 2013/07/22 01:44:15 misho 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 TSRMLS_DC)
36: {
37: int index;
38: zend_rsrc_list_entry le;
39:
40: le.ptr=ptr;
41: le.type=type;
42: le.refcount=1;
43:
44: index = zend_hash_next_free_element(&EG(regular_list));
45:
46: zend_hash_index_update(&EG(regular_list), index, (void *) &le, sizeof(zend_rsrc_list_entry), NULL);
47: return index;
48: }
49:
50: ZEND_API int _zend_list_delete(int id TSRMLS_DC)
51: {
52: zend_rsrc_list_entry *le;
53:
54: if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
55: /* printf("del(%d): %d->%d\n", id, le->refcount, le->refcount-1); */
56: if (--le->refcount<=0) {
57: return zend_hash_index_del(&EG(regular_list), id);
58: } else {
59: return SUCCESS;
60: }
61: } else {
62: return FAILURE;
63: }
64: }
65:
66:
67: ZEND_API void *_zend_list_find(int id, int *type TSRMLS_DC)
68: {
69: zend_rsrc_list_entry *le;
70:
71: if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
72: *type = le->type;
73: return le->ptr;
74: } else {
75: *type = -1;
76: return NULL;
77: }
78: }
79:
80: ZEND_API int _zend_list_addref(int id TSRMLS_DC)
81: {
82: zend_rsrc_list_entry *le;
83:
84: if (zend_hash_index_find(&EG(regular_list), id, (void **) &le)==SUCCESS) {
85: /* printf("add(%d): %d->%d\n", id, le->refcount, le->refcount+1); */
86: le->refcount++;
87: return SUCCESS;
88: } else {
89: return FAILURE;
90: }
91: }
92:
93:
94: ZEND_API int zend_register_resource(zval *rsrc_result, void *rsrc_pointer, int rsrc_type TSRMLS_DC)
95: {
96: int rsrc_id;
97:
98: rsrc_id = zend_list_insert(rsrc_pointer, rsrc_type TSRMLS_CC);
99:
100: if (rsrc_result) {
101: rsrc_result->value.lval = rsrc_id;
102: rsrc_result->type = IS_RESOURCE;
103: }
104:
105: return rsrc_id;
106: }
107:
108:
109: ZEND_API void *zend_fetch_resource(zval **passed_id TSRMLS_DC, int default_id, const char *resource_type_name, int *found_resource_type, int num_resource_types, ...)
110: {
111: int id;
112: int actual_resource_type;
113: void *resource;
114: va_list resource_types;
115: int i;
116: const char *space;
117: const char *class_name;
118:
119: if (default_id==-1) { /* use id */
120: if (!passed_id) {
121: if (resource_type_name) {
122: class_name = get_active_class_name(&space TSRMLS_CC);
123: zend_error(E_WARNING, "%s%s%s(): no %s resource supplied", class_name, space, get_active_function_name(TSRMLS_C), resource_type_name);
124: }
125: return NULL;
126: } else if ((*passed_id)->type != IS_RESOURCE) {
127: if (resource_type_name) {
128: class_name = get_active_class_name(&space TSRMLS_CC);
129: 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);
130: }
131: return NULL;
132: }
133: id = (*passed_id)->value.lval;
134: } else {
135: id = default_id;
136: }
137:
138: resource = zend_list_find(id, &actual_resource_type);
139: if (!resource) {
140: if (resource_type_name) {
141: class_name = get_active_class_name(&space TSRMLS_CC);
142: 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);
143: }
144: return NULL;
145: }
146:
147: va_start(resource_types, num_resource_types);
148: for (i=0; i<num_resource_types; i++) {
149: if (actual_resource_type == va_arg(resource_types, int)) {
150: va_end(resource_types);
151: if (found_resource_type) {
152: *found_resource_type = actual_resource_type;
153: }
154: return resource;
155: }
156: }
157: va_end(resource_types);
158:
159: if (resource_type_name) {
160: class_name = get_active_class_name(&space TSRMLS_CC);
161: 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);
162: }
163:
164: return NULL;
165: }
166:
167:
168: void list_entry_destructor(void *ptr)
169: {
170: zend_rsrc_list_entry *le = (zend_rsrc_list_entry *) ptr;
171: zend_rsrc_list_dtors_entry *ld;
172: TSRMLS_FETCH();
173:
174: if (zend_hash_index_find(&list_destructors, le->type, (void **) &ld)==SUCCESS) {
175: switch (ld->type) {
176: case ZEND_RESOURCE_LIST_TYPE_STD:
177: if (ld->list_dtor) {
178: (ld->list_dtor)(le->ptr);
179: }
180: break;
181: case ZEND_RESOURCE_LIST_TYPE_EX:
182: if (ld->list_dtor_ex) {
183: ld->list_dtor_ex(le TSRMLS_CC);
184: }
185: break;
186: EMPTY_SWITCH_DEFAULT_CASE()
187: }
188: } else {
189: zend_error(E_WARNING,"Unknown list entry type in request shutdown (%d)", le->type);
190: }
191: }
192:
193:
194: void plist_entry_destructor(void *ptr)
195: {
196: zend_rsrc_list_entry *le = (zend_rsrc_list_entry *) ptr;
197: zend_rsrc_list_dtors_entry *ld;
198: TSRMLS_FETCH();
199:
200: if (zend_hash_index_find(&list_destructors, le->type, (void **) &ld)==SUCCESS) {
201: switch (ld->type) {
202: case ZEND_RESOURCE_LIST_TYPE_STD:
203: if (ld->plist_dtor) {
204: (ld->plist_dtor)(le->ptr);
205: }
206: break;
207: case ZEND_RESOURCE_LIST_TYPE_EX:
208: if (ld->plist_dtor_ex) {
209: ld->plist_dtor_ex(le TSRMLS_CC);
210: }
211: break;
212: EMPTY_SWITCH_DEFAULT_CASE()
213: }
214: } else {
215: zend_error(E_WARNING,"Unknown persistent list entry type in module shutdown (%d)", le->type);
216: }
217: }
218:
219:
220: int zend_init_rsrc_list(TSRMLS_D)
221: {
222: if (zend_hash_init(&EG(regular_list), 0, NULL, list_entry_destructor, 0)==SUCCESS) {
223: EG(regular_list).nNextFreeElement=1; /* we don't want resource id 0 */
224: return SUCCESS;
225: } else {
226: return FAILURE;
227: }
228: }
229:
230:
231: int zend_init_rsrc_plist(TSRMLS_D)
232: {
233: return zend_hash_init_ex(&EG(persistent_list), 0, NULL, plist_entry_destructor, 1, 0);
234: }
235:
236:
237: void zend_destroy_rsrc_list(HashTable *ht TSRMLS_DC)
238: {
239: zend_hash_graceful_reverse_destroy(ht);
240: }
241:
242: static int clean_module_resource(zend_rsrc_list_entry *le, int *resource_id TSRMLS_DC)
243: {
244: if (le->type == *resource_id) {
245: return 1;
246: } else {
247: return 0;
248: }
249: }
250:
251:
252: static int zend_clean_module_rsrc_dtors_cb(zend_rsrc_list_dtors_entry *ld, int *module_number TSRMLS_DC)
253: {
254: if (ld->module_number == *module_number) {
255: zend_hash_apply_with_argument(&EG(persistent_list), (apply_func_arg_t) clean_module_resource, (void *) &(ld->resource_id) TSRMLS_CC);
256: return 1;
257: } else {
258: return 0;
259: }
260: }
261:
262:
263: void zend_clean_module_rsrc_dtors(int module_number TSRMLS_DC)
264: {
265: zend_hash_apply_with_argument(&list_destructors, (apply_func_arg_t) zend_clean_module_rsrc_dtors_cb, (void *) &module_number TSRMLS_CC);
266: }
267:
268:
269: ZEND_API int zend_register_list_destructors(void (*ld)(void *), void (*pld)(void *), int module_number)
270: {
271: zend_rsrc_list_dtors_entry lde;
272:
273: #if 0
274: printf("Registering destructors %d for module %d\n", list_destructors.nNextFreeElement, module_number);
275: #endif
276:
277: lde.list_dtor=(void (*)(void *)) ld;
278: lde.plist_dtor=(void (*)(void *)) pld;
279: lde.list_dtor_ex = lde.plist_dtor_ex = NULL;
280: lde.module_number = module_number;
281: lde.resource_id = list_destructors.nNextFreeElement;
282: lde.type = ZEND_RESOURCE_LIST_TYPE_STD;
283: lde.type_name = NULL;
284:
285: if (zend_hash_next_index_insert(&list_destructors, (void *) &lde, sizeof(zend_rsrc_list_dtors_entry), NULL)==FAILURE) {
286: return FAILURE;
287: }
288: return list_destructors.nNextFreeElement-1;
289: }
290:
291:
292: ZEND_API int zend_register_list_destructors_ex(rsrc_dtor_func_t ld, rsrc_dtor_func_t pld, const char *type_name, int module_number)
293: {
294: zend_rsrc_list_dtors_entry lde;
295:
296: #if 0
297: printf("Registering destructors %d for module %d\n", list_destructors.nNextFreeElement, module_number);
298: #endif
299:
300: lde.list_dtor = NULL;
301: lde.plist_dtor = NULL;
302: lde.list_dtor_ex = ld;
303: lde.plist_dtor_ex = pld;
304: lde.module_number = module_number;
305: lde.resource_id = list_destructors.nNextFreeElement;
306: lde.type = ZEND_RESOURCE_LIST_TYPE_EX;
307: lde.type_name = type_name;
308:
309: if (zend_hash_next_index_insert(&list_destructors, (void *) &lde, sizeof(zend_rsrc_list_dtors_entry), NULL)==FAILURE) {
310: return FAILURE;
311: }
312: return list_destructors.nNextFreeElement-1;
313: }
314:
315: ZEND_API int zend_fetch_list_dtor_id(char *type_name)
316: {
317: zend_rsrc_list_dtors_entry *lde;
318: HashPosition pos;
319:
320: zend_hash_internal_pointer_reset_ex(&list_destructors, &pos);
321: while (zend_hash_get_current_data_ex(&list_destructors, (void **)&lde, &pos) == SUCCESS) {
322: if (lde->type_name && (strcmp(type_name, lde->type_name) == 0)) {
323: #if 0
324: printf("Found resource id %d for resource type %s\n", (*lde).resource_id, type_name);
325: #endif
326: return lde->resource_id;
327: }
328: zend_hash_move_forward_ex(&list_destructors, &pos);
329: }
330:
331: return 0;
332: }
333:
334: int zend_init_rsrc_list_dtors(void)
335: {
336: int retval;
337:
338: retval = zend_hash_init(&list_destructors, 50, NULL, NULL, 1);
339: list_destructors.nNextFreeElement=1; /* we don't want resource type 0 */
340:
341: return retval;
342: }
343:
344:
345: void zend_destroy_rsrc_list_dtors(void)
346: {
347: zend_hash_destroy(&list_destructors);
348: }
349:
350:
351: const char *zend_rsrc_list_get_rsrc_type(int resource TSRMLS_DC)
352: {
353: zend_rsrc_list_dtors_entry *lde;
354: int rsrc_type;
355:
356: if (!zend_list_find(resource, &rsrc_type))
357: return NULL;
358:
359: if (zend_hash_index_find(&list_destructors, rsrc_type, (void **) &lde)==SUCCESS) {
360: return lde->type_name;
361: } else {
362: return NULL;
363: }
364: }
365:
366: /*
367: * Local variables:
368: * tab-width: 4
369: * c-basic-offset: 4
370: * indent-tabs-mode: t
371: * End:
372: */
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