Re: Shared memory, mutex functionality and spawning threads. Is it possible using PHP?
| From: | Per Jessen | Date: | Tue, 02 Sep 2008 05:49:29 +0000 |
| Subject: | Re: Shared memory, mutex functionality and spawning threads. Is it possible using PHP? | ||
| References: | 1 2 3 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-279246@lists.php.net to get a copy of this message | ||
Kent Larsson wrote:
> In absence of shared memory and threads. What I really must have is
> some kind of mutex functionality. I will be manipulating files on disk
> and I don't want two instances to be able to touch the disk at the
> same time.
Touch the disk or touch the file? I assume you meant the latter, i.e.
you don't want two instances to operate on the same file concurrently.
> Is there something I could use for mutual exclusion? If
> there aren't any dedicated methods, are there 100% reliable
> workarounds?
Look up file locking. In fact, this was the topic of a very recent
thread.
/Per Jessen, Zürich