Hey:
On Mon, Feb 2, 2015 at 2:51 PM, François Laupretre <[email protected]> wrote:
>> De : Xinchen Hui [mailto:[email protected]]
>> we used to use lval of zval as a handle to access resource type..
>>
>> but now, we introduced a new type IS_RESOURCE, which make the
>> handle(id) sort of redundant .
>
> Wrong. The IS_RESOURCE type has nothing to do with PHP 7. Only zend_resource
> is new. And handle is not redundant.
of course it's a typo. I meant zend_resource
>
>> further more, the common usage when handling resource is like:
>>
>> if (zend_parse_parameters(ZEND_NUM_ARGS(), "rl", &result,
>> &offset) == FAILURE) {
>> return;
>> }
>> ZEND_FETCH_RESOURCE(mysql_result, MYSQL_RES *, result, -1, "MySQL
>> result", le_result);
>>
>> as you can see, we use "r" to receive a IS_RESOURCE type, that
>> means, check the type in ZEND_FETCH_RESOURCE is overhead..
>
> There's no overhead here. Zend_parse_parameters checks that received arg is
> IS_RESOURCE. Fetch then checks that received resource is one of the accepted
> resource types. Sorry to say that, but are you sure you understand the
> difference between zval types and resource types ?
..... do you really read the FETCH_RESOURCE?
ZEND_API void *zend_fetch_resource(zval *passed_id, int default_id,
const char *resource_type_name, int *found_resource_type, int
num_resource_types, ...)
{
int actual_resource_type;
// void *resource;
va_list resource_types;
int i;
zend_resource *res;
const char *space;
const char *class_name;
if (default_id==-1) { /* use id */
if (!passed_id) {
if (resource_type_name) {
class_name = get_active_class_name(&space);
zend_error(E_WARNING, "%s%s%s(): no %s resource
supplied", class_name, space, get_active_function_name(),
resource_type_name);
}
return NULL;
} else if (Z_TYPE_P(passed_id) != IS_RESOURCE) { // < === what are this?
if (resource_type_name) {
class_name = get_active_class_name(&space);
zend_error(E_WARNING, "%s%s%s(): supplied argument is
not a valid %s resource", class_name, space,
get_active_function_name(), resource_type_name);
}
return NULL;
}
>
>> ZEND_API void *zend_fetch_resource(zval *passed_id, int default_id,
>> const char *resource_type_name, int *found_resource_type, int
>> num_resource_types, ...)
>>
>> we use va_args to passing resource type, that means, the rescue
>> type arguments can not be passed by register but by stack.. which is a
>> little low effiicient .
>
> What do you mean with 'rescue' type ?
expected resource_type
>
> Fetch is supposed to check for a variable number of possible resource types.
> It could probably be restricted to 2 possible types as, generally, it is the
> maximum (one for non-persistent, one for persistent). But I am not sure the
> overhead of passing arg on the stack justifies a change. Remember that id is
> searched in an array, which takes probably much more time that
> pushing/popping one or two arguments.
>
>> so, I'd like propose a zend_resource handling API cleanup..
>>
>> 1. DROP ZEND_REGISTER_RESOURCE/FETCH_RESOURCE.
>>
>> 2. add :
>>
>> ZEND_API void *zend_fetch_resource(zend_resource *res, const
>> char *resource_type_name, int resource_type);
>> ZEND_API void *zend_fetch_resource2(zend_resource *res, const char
>> *resource_type_name, int *found_type, int resource_type, int
>> resource_type2);
>> ZEND_API void *zend_fetch_resource_ex(zval *res, const char
>> *resource_type_name, int resource_type);
>> ZEND_API void *zend_fetch_resource2_ex(zval *res, const char
>> *resource_type_name, int *found_type, int resource_type, int
>> resource_type2);
>
> If you drop ZEND_REGISTER_RESOURCE, how do you register new resources ? Or do
> you mean you don't register them any more ? But registering them is mandatory
> if we want them to be freed when request ends.
>
>> furthermore, I'd like to discuss remove the handle in zend_resource struct..
>>
>> it may breaks some usage (use resource as long/double/string)
>>
>> case IS_RESOURCE: {
>> char buf[sizeof("Resource id #") + MAX_LENGTH_OF_LONG];
>> int len;
>>
>> len = snprintf(buf, sizeof(buf), "Resource id #"
>>ZEND_LONG_FMT, (zend_long)Z_RES_HANDLE_P(op));
>> return zend_string_init(buf, len, 0);
>> }
>
> OK. You want to remove resource registration. But resources don't work this
> way (see http://devzone.zend.com/446/extension-writing-part-iii-resources/).
> If you remove the handle, you remove the whole zend_list API.
>
> The zend_resource struct is not a structure you may fill with random data.
> Using the handle to store long/double/string is not a legitimate usage.
....I think you don't understand what I am talking about. sorry
thanks
>
> Regards
>
> François
>
>
>
>
--
Xinchen Hui
@Laruence
http://www.laruence.com/
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