SPUG: Perl Question?
DeRykus, Charles E
charles.e.derykus at boeing.com
Wed May 11 18:23:33 PDT 2005
> For this whole thread I have to admit that I've been thinking people are wasting
> their time trying to figure ways around using a real mutex facility that's supported
> by the operating system. Surely the answer is that you should use the CPAN module
> that encapsulates this in some reasonably elegant way, right?
> Problem is that I can't find it. Is there such a beast? Seems like an obvious need.
> Candidates like Win32::Mutex fail for obvious reasons. IPC::Semaphore seems like it'd
> be the right tool for the job, but despite the name it doesn't appear to be portable
> ("SysV Semaphore IPC object class" pretty much takes it out of contention).
> What am I missing?
I wonder if flock with an external file would be reasonably portable..
(seems to work on Win32 and Solaris).
use Fcntl qw(:flock);
BEGIN { open MYLOCK, '>', 'mylock' and flock MYLOCK, LOCK_EX|LOCK_NB
or die "already running\n";
}
--
Charles DeRykus
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