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Groups > comp.lang.php > #7527

Re: php daemon

From Christoph Becker <cmbecker69@gmx.de>
Newsgroups comp.lang.php
Subject Re: php daemon
Date 2012-11-11 23:17 +0100
Organization Aioe.org NNTP Server
Message-ID <k7p84u$p0f$1@speranza.aioe.org> (permalink)
References (1 earlier) <k7osrj$ipv$2@dont-email.me> <k7p0ch$urc$1@speranza.aioe.org> <k7p27m$kte$1@dont-email.me> <k7p4t3$ap2$1@speranza.aioe.org> <k7p5oh$bco$1@dont-email.me>

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Jerry Stuckle wrote:
> Notice the documentation says the zval CAN be freed - not the zval WILL
> be freed.  Two entirely different statements.

ACK.  I had noted that; therefore I wrote that the manual isn't very
clear in this (IMO important) regard.  "can" does neither imply nor
exclude, that it "will" be done.

I've made the following test:

$a = uniqid(); // force dynamic memory allocation
echo memory_get_usage(), "\n";
$a = 'foo'; // don't unset($a), as this will change the "symbol table"
echo memory_get_usage(), "\n";
gc_collect_cycles(); // force garbage collection
echo memory_get_usage(), "\n";

The result with my PHP 5.4.7 on Windows XP:

121344
121304
121304

So either the zval holding the result of uniqid() is already freed, when
$a is set to 'foo', or gc_collect_cycles() doesn't actually trigger the
garbage collector in this case.

-- 
Christoph M. Becker

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Thread

php daemon "sl@exabyte" <sb5309@hotmail.com> - 2012-11-12 01:18 +0800
  Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 14:04 -0500
    Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-11 21:05 +0100
      Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 15:35 -0500
        Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-11 22:22 +0100
          Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 16:36 -0500
            Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-11 23:17 +0100
              Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-11 18:11 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-12 14:35 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-12 08:38 -0500
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-13 07:44 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-14 21:19 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-14 16:33 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-14 23:13 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-15 07:41 -0500
                Re: php daemon Christoph Becker <cmbecker69@gmx.de> - 2012-11-15 16:55 +0100
    Re: php daemon "sl@exabyte" <sb5309@hotmail.com> - 2012-11-12 23:45 +0800
      Re: php daemon The Natural Philosopher <tnp@invalid.invalid> - 2012-11-12 16:08 +0000
  Re: php daemon Goran <goran@nospam.com> - 2012-11-13 08:57 +0100
    Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-13 07:47 -0500
      Re: php daemon Goran <goran@nospam.com> - 2012-11-13 14:54 +0100
        Re: php daemon The Natural Philosopher <tnp@invalid.invalid> - 2012-11-13 14:13 +0000
        Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-13 12:23 -0500
          Re: php daemon Goran <goran@nospam.com> - 2012-11-14 08:43 +0100
            Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-14 05:51 -0500
              Re: php daemon Goran <goran@nospam.com> - 2012-11-15 14:08 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-15 08:46 -0500
                Re: php daemon Goran <goran@nospam.com> - 2012-11-15 16:09 +0100
                Re: php daemon Jerry Stuckle <jstucklex@attglobal.net> - 2012-11-15 11:25 -0500
                Re: php daemon Tim Streater <timstreater@greenbee.net> - 2012-11-15 16:20 +0000

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