Zope + Python thread safety

[Aahz]

In article <mailman.440.1080288470.742.python-list at python.org>,
 <fowlertrainer at anonym.hu> wrote:
>
>In Delphi, or C, with threaded application I must acquire/release a
>lock, when I check/set/read any variable (except integer), like this
>(pseudo):
>
>lock=Lock
>func ReadVar():string;
> lock.Enter;
> try
>  Result:=GlobalVar;
> finally
>  lock.Leave;
>end;
>
>proc WriteVar(val:string);
> lock.Enter;
> try
>  GlobalVar:=val;
> finally
>  lock.Leave;
>end;

Python is wonderful: readable and usable pseudocode is almost exactly
the same as real Python code:

import threading
lock = threading.RLock()
def ReadVar():
    lock.acquire()
    Result = GlobalVar
    lock.release()
    return Result

Note that I'm doing this just to show you how similar it is -- this is
*NOT* how I'd recommend doing it (e.g. poor practice to use a global
variable like that).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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