Python Query: Related to locking a resource in a multithreaded environment

tarun tarundevnani at gmail.com
Tue Aug 19 08:25:18 CEST 2008


I think I need something called global interpreter lock which is accessible
to all the threads. But I am not sure how to implement this.


On Tue, Aug 19, 2008 at 11:28 AM, tarun <tarundevnani at gmail.com> wrote:

>  Hello All,
>
> I've a configuration.ini file. This particular can be accessed by several
> threads of my application. Each thread can read/write configuration
> parameters from/to the configuration.ini file. I am using threading (Rlock)
> to lock the resource (configuration.ini file) while accessing it from any
> thread. I use the file available at
> http://www.voidspace.org.uk/python/configobj.html for read/write.
>
> I did the following in one of my files:
>
> import threading
> class Synchronization:
>   def __init__(self):
>     self.mutex = threading.RLock()
>
> Now this I can create instances of the class Synchronization and use
> acquire/release to work on the shared resource. But every thread would need
> to import this class and hence each thread would create a separate instance
> of the class. This means several lock variables. But I think we need a
> global lock flag that is accessible across all the threads.
>
> How do i do this?
>
> Please let me know ASAP.
>
> Thanks In Advance,
> Tarun
>
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