mirror of
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413 lines
13 KiB
C
413 lines
13 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2013 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#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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memset(&objects->object_buckets[0], 0, sizeof(zend_object_store_bucket));
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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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objects->object_buckets = NULL;
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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 (!objects->object_buckets[i].destructor_called) {
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objects->object_buckets[i].destructor_called = 1;
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if (obj->dtor && obj->object) {
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obj->refcount++;
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obj->dtor(obj->object, i TSRMLS_CC);
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obj = &objects->object_buckets[i].bucket.obj;
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obj->refcount--;
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}
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}
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}
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}
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}
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ZEND_API void zend_objects_store_mark_destructed(zend_objects_store *objects TSRMLS_DC)
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{
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zend_uint i;
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if (!objects->object_buckets) {
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return;
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}
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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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objects->object_buckets[i].destructor_called = 1;
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}
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}
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}
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ZEND_API void zend_objects_store_free_object_storage(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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GC_REMOVE_ZOBJ_FROM_BUFFER(obj);
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objects->object_buckets[i].valid = 0;
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if (obj->free_storage) {
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obj->free_storage(obj->object TSRMLS_CC);
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}
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/* Not adding to free list as we are shutting down anyway */
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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_free_object_storage_t free_storage, 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].destructor_called = 0;
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EG(objects_store).object_buckets[handle].valid = 1;
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obj->refcount = 1;
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GC_OBJ_INIT(obj);
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obj->object = object;
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obj->dtor = dtor?dtor:(zend_objects_store_dtor_t)zend_objects_destroy_object;
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obj->free_storage = free_storage;
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obj->clone = clone;
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obj->handlers = NULL;
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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 zend_uint zend_objects_store_get_refcount(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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return EG(objects_store).object_buckets[handle].bucket.obj.refcount;
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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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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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/*
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* Add a reference to an objects store entry given the object handle.
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*/
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ZEND_API void zend_objects_store_add_ref_by_handle(zend_object_handle handle TSRMLS_DC)
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{
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EG(objects_store).object_buckets[handle].bucket.obj.refcount++;
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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;
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handle = Z_OBJ_HANDLE_P(zobject);
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Z_ADDREF_P(zobject);
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zend_objects_store_del_ref_by_handle_ex(handle, Z_OBJ_HT_P(zobject) TSRMLS_CC);
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Z_DELREF_P(zobject);
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GC_ZOBJ_CHECK_POSSIBLE_ROOT(zobject);
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}
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/*
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* Delete a reference to an objects store entry given the object handle.
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*/
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ZEND_API void zend_objects_store_del_ref_by_handle_ex(zend_object_handle handle, const zend_object_handlers *handlers TSRMLS_DC) /* {{{ */
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{
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struct _store_object *obj;
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int failure = 0;
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if (!EG(objects_store).object_buckets) {
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return;
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}
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obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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/* Make sure we hold a reference count during the destructor call
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otherwise, when the destructor ends the storage might be freed
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when the refcount reaches 0 a second time
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*/
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if (EG(objects_store).object_buckets[handle].valid) {
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if (obj->refcount == 1) {
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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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if (handlers && !obj->handlers) {
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obj->handlers = handlers;
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}
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zend_try {
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obj->dtor(obj->object, handle TSRMLS_CC);
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} zend_catch {
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failure = 1;
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} zend_end_try();
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}
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}
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/* re-read the object from the object store as the store might have been reallocated in the dtor */
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obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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if (obj->refcount == 1) {
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GC_REMOVE_ZOBJ_FROM_BUFFER(obj);
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if (obj->free_storage) {
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zend_try {
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obj->free_storage(obj->object TSRMLS_CC);
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} zend_catch {
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failure = 1;
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} zend_end_try();
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}
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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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obj->refcount--;
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#if ZEND_DEBUG_OBJECTS
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if (obj->refcount == 0) {
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fprintf(stderr, "Deallocated object id #%d\n", handle);
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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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if (failure) {
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zend_bailout();
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}
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}
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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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obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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if (obj->clone == NULL) {
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zend_error(E_CORE_ERROR, "Trying to clone uncloneable object of class %s", Z_OBJCE_P(zobject)->name);
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}
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obj->clone(obj->object, &new_object TSRMLS_CC);
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obj = &EG(objects_store).object_buckets[handle].bucket.obj;
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retval.handle = zend_objects_store_put(new_object, obj->dtor, obj->free_storage, obj->clone TSRMLS_CC);
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retval.handlers = Z_OBJ_HT_P(zobject);
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EG(objects_store).object_buckets[handle].bucket.obj.handlers = retval.handlers;
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return retval;
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}
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ZEND_API void *zend_object_store_get_object(const 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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return EG(objects_store).object_buckets[handle].bucket.obj.object;
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}
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/*
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* Retrieve an entry from the objects store given the object handle.
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*/
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ZEND_API void *zend_object_store_get_object_by_handle(zend_object_handle handle TSRMLS_DC)
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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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/* zend_object_store_set_object:
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* It is ONLY valid to call this function from within the constructor of an
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* overloaded object. Its purpose is to set the object pointer for the object
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* when you can't possibly know its value until you have parsed the arguments
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* from the constructor function. You MUST NOT use this function for any other
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* weird games, or call it at any other time after the object is constructed.
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* */
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ZEND_API void zend_object_store_set_object(zval *zobject, void *object TSRMLS_DC)
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{
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zend_object_handle handle = Z_OBJ_HANDLE_P(zobject);
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EG(objects_store).object_buckets[handle].bucket.obj.object = object;
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}
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/* Called when the ctor was terminated by an exception */
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ZEND_API void zend_object_store_ctor_failed(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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zend_object_store_bucket *obj_bucket = &EG(objects_store).object_buckets[handle];
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obj_bucket->bucket.obj.handlers = Z_OBJ_HT_P(zobject);;
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obj_bucket->destructor_called = 1;
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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_free_storage(zend_proxy_object *object 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;
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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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Z_TYPE_P(retval) = IS_OBJECT;
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Z_OBJ_HANDLE_P(retval) = zend_objects_store_put(pobj, NULL, (zend_objects_free_object_storage_t) zend_objects_proxy_free_storage, (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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return retval;
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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(void)
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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, /* read dimension */
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NULL, /* write_dimension */
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NULL, /* get_property_ptr_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, /* has_dimension */
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NULL, /* unset_dimension */
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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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NULL, /* cast_object */
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NULL, /* count_elements */
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};
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*/
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