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|
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2003 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#include "zend_API.h"
#include "zend_objects_API.h"
#define ZEND_DEBUG_OBJECTS 0
ZEND_API void zend_objects_store_init(zend_objects_store *objects, zend_uint init_size)
{
objects->object_buckets = (zend_object_store_bucket *) emalloc(init_size * sizeof(zend_object_store_bucket));
objects->top = 1; /* Skip 0 so that handles are true */
objects->size = init_size;
objects->free_list_head = -1;
}
ZEND_API void zend_objects_store_destroy(zend_objects_store *objects)
{
efree(objects->object_buckets);
}
ZEND_API void zend_objects_store_call_destructors(zend_objects_store *objects TSRMLS_DC)
{
zend_uint i = 1;
for (i = 1; i < objects->top ; i++) {
if (objects->object_buckets[i].valid) {
struct _store_object *obj = &objects->object_buckets[i].bucket.obj;
if (obj->dtor && !objects->object_buckets[i].destructor_called) {
objects->object_buckets[i].destructor_called = 1;
obj->dtor(obj->object, i TSRMLS_CC);
}
objects->object_buckets[i].valid = 0;
}
}
}
/* Store objects API */
ZEND_API zend_object_handle zend_objects_store_put(void *object, zend_objects_store_dtor_t dtor, zend_objects_store_clone_t clone TSRMLS_DC)
{
zend_object_handle handle;
struct _store_object *obj;
if (EG(objects_store).free_list_head != -1) {
handle = EG(objects_store).free_list_head;
EG(objects_store).free_list_head = EG(objects_store).object_buckets[handle].bucket.free_list.next;
} else {
if (EG(objects_store).top == EG(objects_store).size) {
EG(objects_store).size <<= 1;
EG(objects_store).object_buckets = (zend_object_store_bucket *) erealloc(EG(objects_store).object_buckets, EG(objects_store).size * sizeof(zend_object_store_bucket));
}
handle = EG(objects_store).top++;
}
obj = &EG(objects_store).object_buckets[handle].bucket.obj;
EG(objects_store).object_buckets[handle].valid = 1;
EG(objects_store).object_buckets[handle].destructor_called = 0;
obj->refcount = 1;
obj->object = object;
obj->dtor = dtor;
obj->clone = clone;
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Allocated object id #%d\n", handle);
#endif
return handle;
}
ZEND_API void zend_objects_store_add_ref(zval *object TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(object);
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to add reference to invalid object");
}
EG(objects_store).object_buckets[handle].bucket.obj.refcount++;
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Increased refcount of object id #%d\n", handle);
#endif
}
ZEND_API void zend_objects_store_delete_obj(zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
struct _store_object *obj = &EG(objects_store).object_buckets[handle].bucket.obj;
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to delete invalid object");
}
if (obj->dtor && !EG(objects_store).object_buckets[handle].destructor_called) {
EG(objects_store).object_buckets[handle].destructor_called = 1;
obj->dtor(obj->object, handle TSRMLS_CC);
}
EG(objects_store).object_buckets[handle].valid = 0;
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Deleted object id #%d\n", handle);
#endif
}
#define ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST() \
EG(objects_store).object_buckets[handle].bucket.free_list.next = EG(objects_store).free_list_head; \
EG(objects_store).free_list_head = handle; \
EG(objects_store).object_buckets[handle].valid = 0;
ZEND_API void zend_objects_store_del_ref(zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
struct _store_object *obj = &EG(objects_store).object_buckets[handle].bucket.obj;
if (--obj->refcount == 0) {
if (EG(objects_store).object_buckets[handle].valid) {
if (!EG(objects_store).object_buckets[handle].destructor_called) {
EG(objects_store).object_buckets[handle].destructor_called = 1;
if (obj->dtor) {
obj->dtor(obj->object, handle TSRMLS_CC);
}
EG(objects_store).object_buckets[handle].valid = 0;
if (obj->refcount == 0) {
ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST();
}
}
}
#if ZEND_DEBUG_OBJECTS
fprintf(stderr, "Deallocated object id #%d\n", handle);
#endif
}
#if ZEND_DEBUG_OBJECTS
else {
fprintf(stderr, "Decreased refcount of object id #%d\n", handle);
}
#endif
}
ZEND_API zend_object_value zend_objects_store_clone_obj(zval *zobject TSRMLS_DC)
{
zend_object_value retval;
void *new_object;
struct _store_object *obj;
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_CORE_ERROR, "Trying to clone invalid object of class %s", Z_OBJCE_P(zobject)->name);
}
obj = &EG(objects_store).object_buckets[handle].bucket.obj;
if (obj->clone == NULL) {
zend_error(E_CORE_ERROR, "Trying to clone uncloneable object of class %s", Z_OBJCE_P(zobject)->name);
}
obj->clone(obj->object, &new_object TSRMLS_CC);
retval.handle = zend_objects_store_put(new_object, obj->dtor, obj->clone TSRMLS_CC);
retval.handlers = Z_OBJ_HT_P(zobject);
return retval;
}
ZEND_API void *zend_object_store_get_object(zval *zobject TSRMLS_DC)
{
zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
if (!EG(objects_store).object_buckets[handle].valid) {
zend_error(E_ERROR, "Trying to access invalid object");
return NULL;
}
return EG(objects_store).object_buckets[handle].bucket.obj.object;
}
/* Proxy objects workings */
typedef struct _zend_proxy_object {
zval *object;
zval *property;
} zend_proxy_object;
static zend_object_handlers zend_object_proxy_handlers;
ZEND_API void zend_objects_proxy_dtor(zend_proxy_object *object, zend_object_handle handle TSRMLS_DC)
{
zval_ptr_dtor(&object->object);
zval_ptr_dtor(&object->property);
efree(object);
}
ZEND_API void zend_objects_proxy_clone(zend_proxy_object *object, zend_proxy_object **object_clone TSRMLS_DC)
{
*object_clone = emalloc(sizeof(zend_proxy_object));
(*object_clone)->object = object->object;
(*object_clone)->property = object->property;
zval_add_ref(&(*object_clone)->property);
zval_add_ref(&(*object_clone)->object);
}
ZEND_API zval **zend_object_create_proxy(zval *object, zval *member TSRMLS_DC)
{
zend_proxy_object *pobj = emalloc(sizeof(zend_proxy_object));
zval *retval, **pretval;
pobj->object = object;
pobj->property = member;
zval_add_ref(&pobj->property);
zval_add_ref(&pobj->object);
MAKE_STD_ZVAL(retval);
retval->type = IS_OBJECT;
Z_OBJ_HANDLE_P(retval) = zend_objects_store_put(pobj, (zend_objects_store_dtor_t)zend_objects_proxy_dtor, (zend_objects_store_clone_t)zend_objects_proxy_clone TSRMLS_CC);
Z_OBJ_HT_P(retval) = &zend_object_proxy_handlers;
pretval = emalloc(sizeof(zval *));
*pretval = retval;
return pretval;
}
ZEND_API void zend_object_proxy_set(zval **property, zval *value TSRMLS_DC)
{
zend_proxy_object *probj = zend_object_store_get_object(*property TSRMLS_CC);
if (Z_OBJ_HT_P(probj->object) && Z_OBJ_HT_P(probj->object)->write_property) {
Z_OBJ_HT_P(probj->object)->write_property(probj->object, probj->property, value TSRMLS_CC);
} else {
zend_error(E_WARNING, "Cannot write property of object - no write handler defined");
}
}
ZEND_API zval* zend_object_proxy_get(zval *property TSRMLS_DC)
{
zend_proxy_object *probj = zend_object_store_get_object(property TSRMLS_CC);
if (Z_OBJ_HT_P(probj->object) && Z_OBJ_HT_P(probj->object)->read_property) {
return Z_OBJ_HT_P(probj->object)->read_property(probj->object, probj->property, 0 TSRMLS_CC);
} else {
zend_error(E_WARNING, "Cannot read property of object - no read handler defined");
}
return NULL;
}
ZEND_API zend_object_handlers *zend_get_std_object_handlers()
{
return &std_object_handlers;
}
static zend_object_handlers zend_object_proxy_handlers = {
ZEND_OBJECTS_STORE_HANDLERS,
NULL, /* read_property */
NULL, /* write_property */
NULL, /* read dimension */
NULL, /* write_dimension */
NULL, /* get_property_ptr */
NULL, /* get_property_zval_ptr */
zend_object_proxy_get, /* get */
zend_object_proxy_set, /* set */
NULL, /* has_property */
NULL, /* unset_property */
NULL, /* get_properties */
NULL, /* get_method */
NULL, /* call_method */
NULL, /* get_constructor */
NULL, /* get_class_entry */
NULL, /* get_class_name */
NULL /* compare_objects */
};
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
|
