How to prevent from race conditions to share data between many process and thread in python

[Gabriel Genellina]

En Tue, 06 Feb 2007 08:49:51 -0300, Diez B. Roggisch <deets at nospam.web.de>  
escribió:

> mars wrote:
>
>> On 2月6日, 下午6时14分, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
>>> mars wrote:
>>> > I use TurboGears to do some web service. TurboGears use cherrypy.  
>>> When
>>> > web browser access this site, the cherrypy will call my python
>>> > program. So my program looks like a lib. When web browser access the
>>> > site, the http server will fock a process or gerenate a thread. I  
>>> need
>>> > share some data or operate some files. How can I prevent from race
>>> > conditions. Is there any way can I lock this.
>>> > Thank you in advance!
>>>
>>> There are the Lock and RLock objects available in the module threading.
>>
>> Can this also lock mutil-process?
>
> No.

You have to use the syncronization tools provided by your OS in that case;  
maybe using a locked file (fcntl).

-- 
Gabriel Genellina