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twisted - locking threads when deferToThread is used

I'm writing an application which will be periodically testing servers.
I will have a global list of these servers(domain names) and need to do
few tasks.
1) DNS checks - I will use asynchronous twisted-names for it
- in case there is a difference comparing to the list it should update
the list(then also in DB)
2) ICMP pings - should be also possible to do it asynchronously
3) Blocking function which will be pinging with SIP requests
- here I will use function deferToThread to make it non-blocking.

1) How do I lock each thread when writing to a global list in twisted?
2) How will I put together all three results mentioned above in the
global list
- is it by using function callLater ?
3) Could you help me with a rough skeleton of this application, please?

Thank you,
Aug 8 '07 #1
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