Re: PHP3 and 64-bit land
| From: | Zeev Suraski | Date: | Sat, 27 Feb 1999 16:50:13 +0000 |
| Subject: | Re: PHP3 and 64-bit land | ||
| References: | 1 | Groups: | php.dev |
| Request: | Send a blank email to php-dev+get-4335@lists.php.net to get a copy of this message | ||
On Sat, 27 Feb 1999 sas@schell.de wrote:
> Well, I don't intend to change that specific part. It appears to me that
> index_ptr is just recycled.
As a general approach, PHP usually uses void pointers to store any
enumerated type (long, pointer, int, etc). There's one exception I can
think of, which is the hash, that uses unsigned integers to store the
numeric offsets.
Resources use hash tables to store themselves, and they usually use the
numeric indices. I think it's extremely safe to use 32-bit integers as
unique identifiers for 64-bit pointers, by simply casting them. You'd
have to be extremely unlucky to bump into a problem because of this data
loss. Your chances of winning the lottery are much much bigger.
Of course, you mustn't *store* pointers in integers, but that's something
different.
Zeev
--
-----------------------------------------------------
Zeev Suraski <zeev@zend.com>
For a PGP public key, finger bourbon@netvision.net.il
--
PHP Development Mailing List http://www.php.net/
To unsubscribe send an empty message to php-dev-unsubscribe@lists.php.net
For help: php-dev-help@lists.php.net