[Twisted-Python] mutex in twisted?
mailing_lists at evotex.ch
Tue Mar 11 09:15:47 EDT 2008
Phil Mayers wrote:
> Gabriel Rossetti wrote:
>> Gabriel Rossetti wrote:
>>> Is there some sort of mutex/semaphore code that can be used in
>>> twisted? I need to run an external subprocess from twisted when I
>>> get some data from a client and I'd like to make sure that while one
>>> client's data spawned the process to run, some other client will not
>>> do the same at the same time, thus my need for a mutex. Maybe there
>>> is another way to do this in a more twisted sort of way (pun not
>>> intended)? If so I'd love to hear how!
>>> Twisted-Python mailing list
>>> Twisted-Python at twistedmatrix.com
>> Oh, I forgot to say, I use this for the process :
>> subprocess.call(["festival", "--tts", filename])
> You can't do that. The python "subprocess" module is blocking, and yuo
> will block the reactor and stop Twisted running.
>> I'm not sure if it is useful for anyone, but I just saw that Twisted
>> has some sort of process code too, though it looks a bit complicated
>> for my needs.
> You need to use it.
> You can use:
> ...if you want to just run a simple command
Ok, yes, that is all I need to do, run a simple command.
> As for mutex - since Twisted isn't multithreaded, you can just use a
> flag variable.
Ok, cool, thanks a lot for your help,
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