Zend/zend_objects

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This source file includes following definitions.
zend_objects_store_init
zend_objects_store_destroy
zend_objects_store_call_destructors
zend_objects_store_mark_destructed
zend_objects_store_free_object_storage
zend_objects_store_put
zend_objects_store_free
zend_objects_store_del
zend_object_store_set_object
zend_object_store_ctor_failed
zend_get_std_object_handlers
   1 /*
   2    +----------------------------------------------------------------------+
   3    | Zend Engine                                                          |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 1998-2016 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    |          Dmitry Stogov <dmitry@zend.com>                             |
  18    +----------------------------------------------------------------------+
  19 */
  20 
  21 /* $Id$ */
  22 
  23 #include "zend.h"
  24 #include "zend_globals.h"
  25 #include "zend_variables.h"
  26 #include "zend_API.h"
  27 #include "zend_objects_API.h"
  28 
  29 ZEND_API void zend_objects_store_init(zend_objects_store *objects, uint32_t init_size)
  30 {
  31         objects->object_buckets = (zend_object **) emalloc(init_size * sizeof(zend_object*));
  32         objects->top = 1; /* Skip 0 so that handles are true */
  33         objects->size = init_size;
  34         objects->free_list_head = -1;
  35         memset(&objects->object_buckets[0], 0, sizeof(zend_object*));
  36 }
  37 
  38 ZEND_API void zend_objects_store_destroy(zend_objects_store *objects)
  39 {
  40         efree(objects->object_buckets);
  41         objects->object_buckets = NULL;
  42 }
  43 
  44 ZEND_API void zend_objects_store_call_destructors(zend_objects_store *objects)
  45 {
  46         if (objects->top > 1) {
  47                 zend_object **obj_ptr = objects->object_buckets + 1;
  48                 zend_object **end = objects->object_buckets + objects->top;
  49 
  50                 do {
  51                         zend_object *obj = *obj_ptr;
  52 
  53                         if (IS_OBJ_VALID(obj)) {
  54                                 if (!(GC_FLAGS(obj) & IS_OBJ_DESTRUCTOR_CALLED)) {
  55                                         GC_FLAGS(obj) |= IS_OBJ_DESTRUCTOR_CALLED;
  56                                         GC_REFCOUNT(obj)++;
  57                                         obj->handlers->dtor_obj(obj);
  58                                         GC_REFCOUNT(obj)--;
  59                                 }
  60                         }
  61                         obj_ptr++;
  62                 } while (obj_ptr != end);
  63         }
  64 }
  65 
  66 ZEND_API void zend_objects_store_mark_destructed(zend_objects_store *objects)
  67 {
  68         if (objects->object_buckets && objects->top > 1) {
  69                 zend_object **obj_ptr = objects->object_buckets + 1;
  70                 zend_object **end = objects->object_buckets + objects->top;
  71 
  72                 do {
  73                         zend_object *obj = *obj_ptr;
  74 
  75                         if (IS_OBJ_VALID(obj)) {
  76                                 GC_FLAGS(obj) |= IS_OBJ_DESTRUCTOR_CALLED;
  77                         }
  78                         obj_ptr++;
  79                 } while (obj_ptr != end);
  80         }
  81 }
  82 
  83 ZEND_API void zend_objects_store_free_object_storage(zend_objects_store *objects)
  84 {
  85         zend_object **obj_ptr, **end, *obj;
  86 
  87         if (objects->top <= 1) {
  88                 return;
  89         }
  90 
  91         /* Free object contents, but don't free objects themselves, so they show up as leaks */
  92         end = objects->object_buckets + 1;
  93         obj_ptr = objects->object_buckets + objects->top;
  94 
  95         do {
  96                 obj_ptr--;
  97                 obj = *obj_ptr;
  98                 if (IS_OBJ_VALID(obj)) {
  99                         if (!(GC_FLAGS(obj) & IS_OBJ_FREE_CALLED)) {
 100                                 GC_FLAGS(obj) |= IS_OBJ_FREE_CALLED;
 101                                 if (obj->handlers->free_obj) {
 102                                         GC_REFCOUNT(obj)++;
 103                                         obj->handlers->free_obj(obj);
 104                                         GC_REFCOUNT(obj)--;
 105                                 }
 106                         }
 107                 }
 108         } while (obj_ptr != end);
 109 }
 110 
 111 
 112 /* Store objects API */
 113 
 114 ZEND_API void zend_objects_store_put(zend_object *object)
 115 {
 116         int handle;
 117 
 118         if (EG(objects_store).free_list_head != -1) {
 119                 handle = EG(objects_store).free_list_head;
 120                 EG(objects_store).free_list_head = GET_OBJ_BUCKET_NUMBER(EG(objects_store).object_buckets[handle]);
 121         } else {
 122                 if (EG(objects_store).top == EG(objects_store).size) {
 123                         EG(objects_store).size <<= 1;
 124                         EG(objects_store).object_buckets = (zend_object **) erealloc(EG(objects_store).object_buckets, EG(objects_store).size * sizeof(zend_object*));
 125                 }
 126                 handle = EG(objects_store).top++;
 127         }
 128         object->handle = handle;
 129         EG(objects_store).object_buckets[handle] = object;
 130 }
 131 
 132 #define ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle)                                                                                                                     \
 133             SET_OBJ_BUCKET_NUMBER(EG(objects_store).object_buckets[handle], EG(objects_store).free_list_head);  \
 134                         EG(objects_store).free_list_head = handle;
 135 
 136 ZEND_API void zend_objects_store_free(zend_object *object) /* {{{ */
 137 {
 138         uint32_t handle = object->handle;
 139         void *ptr = ((char*)object) - object->handlers->offset;
 140 
 141         GC_REMOVE_FROM_BUFFER(object);
 142         efree(ptr);
 143         ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle);
 144 }
 145 /* }}} */
 146 
 147 ZEND_API void zend_objects_store_del(zend_object *object) /* {{{ */
 148 {
 149         /*      Make sure we hold a reference count during the destructor call
 150                 otherwise, when the destructor ends the storage might be freed
 151                 when the refcount reaches 0 a second time
 152          */
 153         if (EG(objects_store).object_buckets &&
 154             IS_OBJ_VALID(EG(objects_store).object_buckets[object->handle])) {
 155                 if (GC_REFCOUNT(object) == 0) {
 156                         int failure = 0;
 157 
 158                         if (!(GC_FLAGS(object) & IS_OBJ_DESTRUCTOR_CALLED)) {
 159                                 GC_FLAGS(object) |= IS_OBJ_DESTRUCTOR_CALLED;
 160 
 161                                 if (object->handlers->dtor_obj) {
 162                                         GC_REFCOUNT(object)++;
 163                                         zend_try {
 164                                                 object->handlers->dtor_obj(object);
 165                                         } zend_catch {
 166                                                 failure = 1;
 167                                         } zend_end_try();
 168                                         GC_REFCOUNT(object)--;
 169                                 }
 170                         }
 171 
 172                         if (GC_REFCOUNT(object) == 0) {
 173                                 uint32_t handle = object->handle;
 174                                 void *ptr;
 175 
 176                                 EG(objects_store).object_buckets[handle] = SET_OBJ_INVALID(object);
 177                                 if (!(GC_FLAGS(object) & IS_OBJ_FREE_CALLED)) {
 178                                         GC_FLAGS(object) |= IS_OBJ_FREE_CALLED;
 179                                         if (object->handlers->free_obj) {
 180                                                 zend_try {
 181                                                         GC_REFCOUNT(object)++;
 182                                                         object->handlers->free_obj(object);
 183                                                         GC_REFCOUNT(object)--;
 184                                                 } zend_catch {
 185                                                         failure = 1;
 186                                                 } zend_end_try();
 187                                         }
 188                                 }
 189                                 ptr = ((char*)object) - object->handlers->offset;
 190                                 GC_REMOVE_FROM_BUFFER(object);
 191                                 efree(ptr);
 192                                 ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle);
 193                         }
 194 
 195                         if (failure) {
 196                                 zend_bailout();
 197                         }
 198                 } else {
 199                         GC_REFCOUNT(object)--;
 200                 }
 201         }
 202 }
 203 /* }}} */
 204 
 205 /* zend_object_store_set_object:
 206  * It is ONLY valid to call this function from within the constructor of an
 207  * overloaded object.  Its purpose is to set the object pointer for the object
 208  * when you can't possibly know its value until you have parsed the arguments
 209  * from the constructor function.  You MUST NOT use this function for any other
 210  * weird games, or call it at any other time after the object is constructed.
 211  * */
 212 ZEND_API void zend_object_store_set_object(zval *zobject, zend_object *object)
 213 {
 214         EG(objects_store).object_buckets[Z_OBJ_HANDLE_P(zobject)] = object;
 215 }
 216 
 217 /* Called when the ctor was terminated by an exception */
 218 ZEND_API void zend_object_store_ctor_failed(zend_object *obj)
 219 {
 220         GC_FLAGS(obj) |= IS_OBJ_DESTRUCTOR_CALLED;
 221 }
 222 
 223 ZEND_API zend_object_handlers *zend_get_std_object_handlers(void)
 224 {
 225         return &std_object_handlers;
 226 }
 227 
 228 /*
 229  * Local variables:
 230  * tab-width: 4
 231  * c-basic-offset: 4
 232  * indent-tabs-mode: t
 233  * End:
 234  */
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root/Zend/zend_objects_API.c

DEFINITIONS
