Just to be clear, I was *not* advocating the use of files as a
semaphore. I'm just saying its one of your alternatives. Sometimes you
just gotta do what you gotta do (for example from a bourne shell
program). Not that I'm trying to get anyone to use this method (I
wouldn't) but unless you're flailing on the lock those milliseconds
you're talking about are nominal and the average program could probably
care less.
- Matt
John Summerfield wrote:
>
> > This is a multi-part message in MIME format.
> > --------------2FC454B1D9AB31B600F414F0
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> > Yes a "semaphore" is very portable (at least within Unix environments).
> > You can also use "flock()" on a file. Another trick is just to create
> > and destroy a file as a sort of gate condition.
>
> Creating & deleting files are extremely slow ways of synchronisation.
> Measure times in tens, maybe hundreds, of milliseconds.
>
> --
> Cheers
> John Summerfield
> http://os2.ami.com.au/os2/ for OS/2 support.
> Configuration, networking, combined IBM ftpsites index.
>
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