mirror of
https://github.com/php/php-src.git
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269 lines
8.2 KiB
C
269 lines
8.2 KiB
C
#include "zend.h"
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#include "zend_globals.h"
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#include "zend_variables.h"
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#include "zend_API.h"
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#include "zend_objects_API.h"
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#define ZEND_DEBUG_OBJECTS 0
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ZEND_API void zend_objects_store_init(zend_objects_store *objects, zend_uint init_size)
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{
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objects->object_buckets = (zend_object_store_bucket *) emalloc(init_size * sizeof(zend_object_store_bucket));
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objects->top = 1; /* Skip 0 so that handles are true */
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objects->size = init_size;
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objects->free_list_head = -1;
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}
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ZEND_API void zend_objects_store_destroy(zend_objects_store *objects)
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{
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efree(objects->object_buckets);
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}
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ZEND_API void zend_objects_store_call_destructors(zend_objects_store *objects TSRMLS_DC)
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{
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zend_uint i = 1;
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for (i = 1; i < objects->top ; i++) {
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if (objects->object_buckets[i].valid) {
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struct _store_object *obj = &objects->object_buckets[i].bucket.obj;
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if (obj->dtor) {
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objects->object_buckets[i].destructor_called = 1;
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obj->dtor(obj->object, i TSRMLS_CC);
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}
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objects->object_buckets[i].valid = 0;
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}
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}
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}
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/* Store objects API */
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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)
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{
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zend_object_handle handle;
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struct _store_object *obj;
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if (EG(objects_store).free_list_head != -1) {
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handle = EG(objects_store).free_list_head;
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EG(objects_store).free_list_head = EG(objects_store).object_buckets[handle].bucket.free_list.next;
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} else {
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if (EG(objects_store).top == EG(objects_store).size) {
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EG(objects_store).size <<= 1;
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EG(objects_store).object_buckets = (zend_object_store_bucket *) erealloc(EG(objects_store).object_buckets, EG(objects_store).size * sizeof(zend_object_store_bucket));
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}
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handle = EG(objects_store).top++;
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}
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obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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EG(objects_store).object_buckets[handle].valid = 1;
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EG(objects_store).object_buckets[handle].destructor_called = 0;
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obj->refcount = 1;
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obj->object = object;
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obj->dtor = dtor;
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obj->clone = clone;
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#if ZEND_DEBUG_OBJECTS
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fprintf(stderr, "Allocated object id #%d\n", handle);
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#endif
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return handle;
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}
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ZEND_API void zend_objects_store_add_ref(zval *object TSRMLS_DC)
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{
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zend_object_handle handle = Z_OBJ_HANDLE_P(object);
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if (!EG(objects_store).object_buckets[handle].valid) {
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zend_error(E_ERROR, "Trying to add reference to invalid object");
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}
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EG(objects_store).object_buckets[handle].bucket.obj.refcount++;
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#if ZEND_DEBUG_OBJECTS
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fprintf(stderr, "Increased refcount of object id #%d\n", handle);
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#endif
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}
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ZEND_API void zend_objects_store_delete_obj(zval *zobject TSRMLS_DC)
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{
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zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
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struct _store_object *obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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if (!EG(objects_store).object_buckets[handle].valid) {
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zend_error(E_ERROR, "Trying to delete invalid object");
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}
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if (obj->dtor && !EG(objects_store).object_buckets[handle].destructor_called) {
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EG(objects_store).object_buckets[handle].destructor_called = 1;
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obj->dtor(obj->object, handle TSRMLS_CC);
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}
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EG(objects_store).object_buckets[handle].valid = 0;
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#if ZEND_DEBUG_OBJECTS
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fprintf(stderr, "Deleted object id #%d\n", handle);
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#endif
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}
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#define ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST() \
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EG(objects_store).object_buckets[handle].bucket.free_list.next = EG(objects_store).free_list_head; \
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EG(objects_store).free_list_head = handle; \
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EG(objects_store).object_buckets[handle].valid = 0;
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ZEND_API void zend_objects_store_del_ref(zval *zobject TSRMLS_DC)
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{
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zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
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struct _store_object *obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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if (--obj->refcount == 0) {
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if (EG(objects_store).object_buckets[handle].valid) {
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if (!EG(objects_store).object_buckets[handle].destructor_called) {
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EG(objects_store).object_buckets[handle].destructor_called = 1;
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if (obj->dtor) {
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obj->dtor(obj->object, handle TSRMLS_CC);
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}
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EG(objects_store).object_buckets[handle].valid = 0;
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if (obj->refcount == 0) {
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ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST();
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}
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}
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}
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#if ZEND_DEBUG_OBJECTS
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fprintf(stderr, "Deallocated object id #%d\n", handle);
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#endif
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}
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#if ZEND_DEBUG_OBJECTS
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else {
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fprintf(stderr, "Decreased refcount of object id #%d\n", handle);
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}
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#endif
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}
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ZEND_API zend_object_value zend_objects_store_clone_obj(zval *zobject TSRMLS_DC)
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{
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zend_object_value retval;
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void *new_object;
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struct _store_object *obj;
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zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
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if (!EG(objects_store).object_buckets[handle].valid) {
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zend_error(E_ERROR, "Trying to clone invalid object");
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}
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obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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if (obj->clone == NULL) {
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zend_error(E_ERROR, "Trying to clone uncloneable object");
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}
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obj->clone(&obj->object, &new_object TSRMLS_CC);
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retval.handle = zend_objects_store_put(new_object, obj->dtor, obj->clone TSRMLS_CC);
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retval.handlers = Z_OBJ_HT_P(zobject);
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return retval;
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}
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ZEND_API void *zend_object_store_get_object(zval *zobject TSRMLS_DC)
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{
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zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
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if (!EG(objects_store).object_buckets[handle].valid) {
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zend_error(E_ERROR, "Trying to access invalid object");
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return NULL;
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}
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return EG(objects_store).object_buckets[handle].bucket.obj.object;
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}
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/* Proxy objects workings */
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typedef struct _zend_proxy_object {
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zval *object;
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zval *property;
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} zend_proxy_object;
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static zend_object_handlers zend_object_proxy_handlers;
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ZEND_API void zend_objects_proxy_dtor(zend_proxy_object *object, zend_object_handle handle TSRMLS_DC)
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{
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zval_ptr_dtor(&object->object);
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zval_ptr_dtor(&object->property);
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efree(object);
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}
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ZEND_API void zend_objects_proxy_clone(zend_proxy_object *object, zend_proxy_object **object_clone TSRMLS_DC)
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{
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*object_clone = emalloc(sizeof(zend_proxy_object));
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(*object_clone)->object = object->object;
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(*object_clone)->property = object->property;
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zval_add_ref(&(*object_clone)->property);
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zval_add_ref(&(*object_clone)->object);
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}
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ZEND_API zval **zend_object_create_proxy(zval *object, zval *member TSRMLS_DC)
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{
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zend_proxy_object *pobj = emalloc(sizeof(zend_proxy_object));
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zval *retval, **pretval;
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pobj->object = object;
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pobj->property = member;
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zval_add_ref(&pobj->property);
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zval_add_ref(&pobj->object);
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MAKE_STD_ZVAL(retval);
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retval->type = IS_OBJECT;
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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);
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Z_OBJ_HT_P(retval) = &zend_object_proxy_handlers;
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pretval = emalloc(sizeof(zval *));
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*pretval = retval;
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return pretval;
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}
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ZEND_API void zend_object_proxy_set(zval **property, zval *value TSRMLS_DC)
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{
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zend_proxy_object *probj = zend_object_store_get_object(*property TSRMLS_CC);
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if (Z_OBJ_HT_P(probj->object) && Z_OBJ_HT_P(probj->object)->write_property) {
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Z_OBJ_HT_P(probj->object)->write_property(probj->object, probj->property, value TSRMLS_CC);
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} else {
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zend_error(E_WARNING, "Cannot write property of object - no write handler defined");
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}
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}
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ZEND_API zval* zend_object_proxy_get(zval *property TSRMLS_DC)
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{
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zend_proxy_object *probj = zend_object_store_get_object(property TSRMLS_CC);
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if (Z_OBJ_HT_P(probj->object) && Z_OBJ_HT_P(probj->object)->read_property) {
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return Z_OBJ_HT_P(probj->object)->read_property(probj->object, probj->property, BP_VAR_R TSRMLS_CC);
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} else {
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zend_error(E_WARNING, "Cannot read property of object - no read handler defined");
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}
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return NULL;
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}
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ZEND_API zend_object_handlers *zend_get_std_object_handlers()
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{
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return &std_object_handlers;
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}
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static zend_object_handlers zend_object_proxy_handlers = {
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ZEND_OBJECTS_STORE_HANDLERS,
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NULL, /* read_property */
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NULL, /* write_property */
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NULL, /* get_property_ptr */
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NULL, /* get_property_zval_ptr */
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zend_object_proxy_get, /* get */
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zend_object_proxy_set, /* set */
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NULL, /* has_property */
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NULL, /* unset_property */
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NULL, /* get_properties */
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NULL, /* get_method */
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NULL, /* call_method */
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NULL, /* get_constructor */
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NULL, /* get_class_entry */
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NULL, /* get_class_name */
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NULL /* compare_objects */
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};
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