10.md

类与对像2(自定义object存储)

1，创建一个扩展

./ext_skel --extname=objects2

2，代码

//定义一个结构用于存储object
typedef struct _hello_object {
	zend_object obj;

	char *name;
	int name_len;
	long age;
} hello_object;

//object操作回调函数
struct _zend_object_handlers {
	/* general object functions */
	zend_object_add_ref_t					add_ref;
	zend_object_del_ref_t					del_ref;
	zend_object_clone_obj_t					clone_obj;
	/* individual object functions */
	zend_object_read_property_t				read_property;
	zend_object_write_property_t			write_property;
	zend_object_read_dimension_t			read_dimension;
	zend_object_write_dimension_t			write_dimension;
	zend_object_get_property_ptr_ptr_t		get_property_ptr_ptr;
	zend_object_get_t						get;
	zend_object_set_t						set;
	zend_object_has_property_t				has_property;
	zend_object_unset_property_t			unset_property;
	zend_object_has_dimension_t				has_dimension;
	zend_object_unset_dimension_t			unset_dimension;
	zend_object_get_properties_t			get_properties;
	zend_object_get_method_t				get_method;
	zend_object_call_method_t				call_method;
	zend_object_get_constructor_t			get_constructor;
	zend_object_get_class_entry_t			get_class_entry;
	zend_object_get_class_name_t			get_class_name;
	zend_object_compare_t					compare_objects;
	zend_object_cast_t						cast_object;
	zend_object_count_elements_t			count_elements;
	zend_object_get_debug_info_t			get_debug_info;
	zend_object_get_closure_t				get_closure;
	zend_object_get_gc_t					get_gc;
};

创建一个object的流程

1，定义class和object handlers(回调方法)

static zend_class_entry *hello_ce;
static zend_object_handlers hello_handlers;

2，定义存储object的结构
typedef struct _hello_object {
	zend_object obj;

	char *name;
	int name_len;
	long age;
} hello_object;

3，在PHP_MINIT_FUNCTION中初始化class
static PHP_MINIT_FUNCTION(objects2){
	zend_class_entry ce;
	INIT_CLASS_ENTRY(ce, "Hello", hello_methods)

	hello_ce = zend_register_internal_class(&ce TSRMLS_CC);
	hello_ce->create_object = hello_ctor;//创建object的回调方法

	memcpy(&hello_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
	// hello_handlers->clone_obj = hello_clone;
 	return SUCCESS;
}

4，实现创建object的回调方法
static zend_object_value hello_ctor(zend_class_entry *ce TSRMLS_DC) {
	hello_object *objval = emalloc(sizeof(hello_object));
	memset(objval, 0, sizeof(hello_object));

	zend_object_value retval;
	zend_object_std_init(&(objval->obj), ce TSRMLS_CC);

	retval.handle = zend_objects_store_put(objval , 
                                        NULL, 
                                        (zend_objects_free_object_storage_t)hello_dtor, //翻译object的回调方法
                                        NULL TSRMLS_CC);
	retval.handlers = &hello_handlers;
	return retval;
}

5，实现销毁object的回调方法
static void hello_dtor(hello_object *objval TSRMLS_CC) {
	if (objval->name) {
    	efree(objval->name);
	}
	zend_object_std_dtor(&(objval->obj) TSRMLS_CC);
	efree(objval);
}

6，调用存储object的结构

#define HELLO_FETCH_OBJECT(zobj) (hello_object *)zend_object_store_get_object((zobj) TSRMLS_CC)
static PHP_METHOD(Hello, __construct) {
	hello_object *objval = HELLO_FETCH_OBJECT(getThis());
	char *name;
	int name_len;
	long age;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sl", &name, &name_len, &age) == FAILURE) {
    	return;
	}

	objval->name = estrndup(name, name_len);
	objval->name_len = name_len;
	objval->age = age;
}



//获取object指针
hello_object *obj = (hello_object *)zend_object_store_get_object(getThis() TSRMLS_CC)