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Date: Mon, 03 Aug 2015 13:10:35 +0000
Message-ID: <CACQesk4CKDgjmwG4-nRERTwt8N=OCo265wORgBM6B1aLsKLTmQ@mail.gmail.com>
To: Alexander Lisachenko <lisachenko.it@gmail.com>, Nicolas Grekas <nicolas.grekas+php@gmail.com>
Cc: Rowan Collins <rowan.collins@gmail.com>, 
	"internals@lists.php.net" <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=089e011839b2f782d5051c67e515
Subject: Re: [PHP-DEV] Exposing object handles to userland
From: colder@php.net (Etienne Kneuss)

--089e011839b2f782d5051c67e515
Content-Type: text/plain; charset=UTF-8

On Mon, Aug 3, 2015 at 2:26 PM Alexander Lisachenko <lisachenko.it@gmail.com>
wrote:

> Hello, internals!
>
> I like the idea to assign a custom identifier to the object, but why this
> should be only in the core? Java has a method 'hashCode' which can be used
> to return an unique identifier for specific object.


Java's hashcode is not unique,it is not meant to be: two live objects can
have the same hash.
Having a hashCode method that returns 0 for all objects is a valid (albeit
stupid) implementation.

As for PHP, It seems like what people actually want is a unique identifier
for objects (for the lifetime of the request), but they compromise and use
the handle instead as it is available without userland counter.

Best,

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