mirror of
https://github.com/php/php-src.git
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233 lines
7.0 KiB
C
233 lines
7.0 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2018 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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| Dmitry Stogov <dmitry@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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ZEND_API void zend_objects_store_init(zend_objects_store *objects, uint32_t init_size)
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{
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objects->object_buckets = (zend_object **) emalloc(init_size * sizeof(zend_object*));
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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*));
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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)
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{
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if (objects->top > 1) {
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uint32_t i;
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for (i = 1; i < objects->top; i++) {
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zend_object *obj = objects->object_buckets[i];
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if (IS_OBJ_VALID(obj)) {
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if (!(GC_FLAGS(obj) & IS_OBJ_DESTRUCTOR_CALLED)) {
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GC_FLAGS(obj) |= IS_OBJ_DESTRUCTOR_CALLED;
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GC_REFCOUNT(obj)++;
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obj->handlers->dtor_obj(obj);
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GC_REFCOUNT(obj)--;
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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)
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{
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if (objects->object_buckets && objects->top > 1) {
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zend_object **obj_ptr = objects->object_buckets + 1;
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zend_object **end = objects->object_buckets + objects->top;
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do {
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zend_object *obj = *obj_ptr;
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if (IS_OBJ_VALID(obj)) {
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GC_FLAGS(obj) |= IS_OBJ_DESTRUCTOR_CALLED;
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}
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obj_ptr++;
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} while (obj_ptr != end);
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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)
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{
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zend_object **obj_ptr, **end, *obj;
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if (objects->top <= 1) {
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return;
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}
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/* Free object contents, but don't free objects themselves, so they show up as leaks */
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end = objects->object_buckets + 1;
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obj_ptr = objects->object_buckets + objects->top;
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do {
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obj_ptr--;
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obj = *obj_ptr;
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if (IS_OBJ_VALID(obj)) {
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if (!(GC_FLAGS(obj) & IS_OBJ_FREE_CALLED)) {
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GC_FLAGS(obj) |= IS_OBJ_FREE_CALLED;
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if (obj->handlers->free_obj) {
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GC_REFCOUNT(obj)++;
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obj->handlers->free_obj(obj);
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GC_REFCOUNT(obj)--;
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}
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}
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}
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} while (obj_ptr != end);
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}
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/* Store objects API */
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ZEND_API void zend_objects_store_put(zend_object *object)
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{
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int handle;
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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 = GET_OBJ_BUCKET_NUMBER(EG(objects_store).object_buckets[handle]);
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} else {
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if (EG(objects_store).top == EG(objects_store).size) {
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uint32_t new_size = 2 * EG(objects_store).size;
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EG(objects_store).object_buckets = (zend_object **) erealloc(EG(objects_store).object_buckets, new_size * sizeof(zend_object*));
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/* Assign size after realloc, in case it fails */
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EG(objects_store).size = new_size;
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}
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handle = EG(objects_store).top++;
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}
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object->handle = handle;
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EG(objects_store).object_buckets[handle] = object;
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}
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#define ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle) \
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SET_OBJ_BUCKET_NUMBER(EG(objects_store).object_buckets[handle], EG(objects_store).free_list_head); \
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EG(objects_store).free_list_head = handle;
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ZEND_API void zend_objects_store_free(zend_object *object) /* {{{ */
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{
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uint32_t handle = object->handle;
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void *ptr = ((char*)object) - object->handlers->offset;
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GC_REMOVE_FROM_BUFFER(object);
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efree(ptr);
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ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle);
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}
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/* }}} */
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ZEND_API void zend_objects_store_del(zend_object *object) /* {{{ */
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{
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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 &&
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IS_OBJ_VALID(EG(objects_store).object_buckets[object->handle])) {
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if (GC_REFCOUNT(object) == 0) {
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int failure = 0;
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if (!(GC_FLAGS(object) & IS_OBJ_DESTRUCTOR_CALLED)) {
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GC_FLAGS(object) |= IS_OBJ_DESTRUCTOR_CALLED;
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if (object->handlers->dtor_obj) {
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GC_REFCOUNT(object)++;
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zend_try {
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object->handlers->dtor_obj(object);
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} zend_catch {
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failure = 1;
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} zend_end_try();
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GC_REFCOUNT(object)--;
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}
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}
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if (GC_REFCOUNT(object) == 0) {
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uint32_t handle = object->handle;
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void *ptr;
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EG(objects_store).object_buckets[handle] = SET_OBJ_INVALID(object);
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if (!(GC_FLAGS(object) & IS_OBJ_FREE_CALLED)) {
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GC_FLAGS(object) |= IS_OBJ_FREE_CALLED;
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if (object->handlers->free_obj) {
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zend_try {
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GC_REFCOUNT(object)++;
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object->handlers->free_obj(object);
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GC_REFCOUNT(object)--;
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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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ptr = ((char*)object) - object->handlers->offset;
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GC_REMOVE_FROM_BUFFER(object);
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efree(ptr);
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ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle);
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}
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if (failure) {
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zend_bailout();
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}
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} else {
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GC_REFCOUNT(object)--;
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}
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}
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}
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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, zend_object *object)
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{
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EG(objects_store).object_buckets[Z_OBJ_HANDLE_P(zobject)] = 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(zend_object *obj)
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{
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GC_FLAGS(obj) |= IS_OBJ_DESTRUCTOR_CALLED;
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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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/*
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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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