[OpenSIPS-Users] $var scope clarification

[Bogdan-Andrei Iancu]

right

Brett Nemeroff wrote:
> I suppose since a child process only handles one message at a time,
> that there is no danger of race conditions using vars, just the
> possibility (likelyhood) of uninitialized data laying around..
>
> Am I on track there? :)
>
> Thanks,
> Brett
>
>
>
> On Tue, Apr 13, 2010 at 11:42 AM, Bogdan-Andrei Iancu
> <bogdan at voice-system.ro> wrote:
>   
>> Hi Brett,
>>
>> I see you missed the last webinar on script variables ;).
>>
>> So, the $var() are script variables - you should not rely on any kind of
>> persistence for them. They are intended to be used in script only (in
>> route + all its subroutes).
>> You should use them for script ops (like iterations, building strings, etc)
>>
>> This vars are not share at all and, as they are attached to processes,
>> it is highly recommended to reset they value before using them in script.
>>
>> Regards,
>> Bogdan
>>
>> Brett Nemeroff wrote:
>>     
>>> Hello All,
>>> I've always been hesitant to use $var type variables over avps since
>>> they have a scope that spans the whole process.. Most of my need for
>>> variables is transactional. I'm just concerned about race conditions.
>>> Am I misunderstanding their scope? ie: $var(customer) is going to
>>> change from transaction to transaction and having that shared across
>>> an entire process wouldn't be good..
>>>
>>>
>>> Thanks for your insight.. :)
>>> -Brett
>>>
>>> _______________________________________________
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>>> Users at lists.opensips.org
>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>
>>>
>>>       
>> --
>> Bogdan-Andrei Iancu
>> www.voice-system.ro
>>
>>
>> _______________________________________________
>> Users mailing list
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>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
>>     
>
> _______________________________________________
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>
>   


-- 
Bogdan-Andrei Iancu
www.voice-system.ro