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pcntl_alarm() doesn't work with apache_worker (multithreaded)

php.internals

Nico Sabbi

19 years ago

Hi,
$subject says everything: when php runs under a multithreaded apache
pcntl_alarm() doesn't work: the alarm is never delivered.

My version of php is 5.2.3, but also all versions I tried of 5.1 work
the same.

Nico

Richard Lynch

19 years ago

On Mon, July 30, 2007 5:25 am, Nico Sabbi wrote:

> $subject says everything: when php runs under a multithreaded apache
> pcntl_alarm() doesn't work: the alarm is never delivered.
>
> My version of php is 5.2.3, but also all versions I tried of 5.1 work
> the same.

http://us2.php.net/manual/en/ref.pcntl.php
"Process Control should not be enabled within a web server environment
and unexpected results may happen if any Process Control functions are
used within a web server environment."

Don't do that.
:-)

It *MIGHT* happen to work in a non-multi-threaded web environment, but
I wouldn't count on it as it's pretty clearly documented not to.

YMMV

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Antony Dovgal

19 years ago

On 30.07.2007 14:25, Nico Sabbi wrote:

> Hi,
> $subject says everything: when php runs under a multithreaded apache
> pcntl_alarm() doesn't work: the alarm is never delivered.

That's pretty much expected since your web-server is multithreaded, while
"alarm() arranges for a SIGALRM signal to be delivered to the **process** in seconds seconds."
(c) man alarm

> My version of php is 5.2.3, but also all versions I tried of 5.1 work
> the same.
>
>     Nico
>

--
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Antony Dovgal