[sr-dev] how to define an infinite while loop?

[Ovidiu Sas]

Actually, the modparam doesn't work.  And I got these errors with the
following simple config:

#!KAMAILIO

mpath="/usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/"
loadmodule "xlog.so"
loadmodule "pv.so"
modparam("pv", "varset", "true=i:1")


route{
        xlog("L_INFO","$true\n");
}

ERROR: <core> [pvapi.c:501]: error searching pvar "true"
ERROR: <core> [pvapi.c:705]: wrong char [e/101] in [$true ] at [4 (0)]
ERROR: xlog [xlog.c:305]: wrong format[$true ]!
ERROR: <core> [route.c:1026]: fixing failed (code=-1) at
cfg:/etc/kamailio/kamailio.cfg:10


I haven't used the varset before, so maybe I'm doing something wrong here ...


On Wed, Apr 7, 2010 at 1:01 PM, Ovidiu Sas <osas at voipembedded.com> wrote:
> Yes, it was in 1.5 and it was really handy.
> The modparam("pv", "varset", "true=i:1") seems to do the trick.  It is
> an extra line in the config but seems to be fine.
>
> Thanks,
> Ovidiu
>
> On Wed, Apr 7, 2010 at 12:25 PM, Daniel-Constantin Mierla
> <miconda at gmail.com> wrote:
>>
>>
>> On 4/7/10 6:14 PM, Ovidiu Sas wrote:
>>
>> How about defining a new PV: '$true'.
>> If we have a constant word in the while loop, then yes, it might be a
>> missconfiguration and it is good to have the warning.
>> Having a '$true' PV will mean that we want an infinite loop and
>> there's no need to print the warning.
>> The '$true' will make the config more easy to read as opposed to
>> defining a variable just for the purpose of creating an infinite loop.
>>
>>
>> never used the while (true) loop, was it in 1.5? If yes, we can wrap the
>> warning log in #!KAMAILIO compat mode.
>>
>> An optimization to Andrei's suggestion is to init the true var at startup,
>> to avoid assignment every cfg execution:
>>
>> modparam("pv", "varset", "true=i:1")
>>
>> Cheers,
>> Daniel
>>
>> Thanks,
>> Ovidiu
>>
>> On Fri, Apr 2, 2010 at 4:53 AM, Andrei Pelinescu-Onciul
>> <andrei at iptel.org> wrote:
>>
>>
>> On Apr 01, 2010 at 22:23, Ovidiu Sas <osas at voipembedded.com> wrote:
>>
>>
>> If I define an infinite loop like this:
>> while( true ) {
>>     ...
>> }
>> the following warning is reported:
>> WARNING: <core> [cfg.y:3307]: warning in config file
>> /etc/kamailio/kamailio.cfg, line 4, column 9-12: constant value in
>> while(...)
>> The config file used for testing:
>> #!KAMAILIO
>>
>> route{
>>         while( true ) {
>>                 exit;
>>         }
>>         exit;
>> }
>>
>>
>> How can I define a simple infinite loop without getting a warning in the
>> logs.
>>
>> I don't want to define a variable just for the while loop and test it.
>> $var(true) = 1;
>> while ($var(true)) {
>>     ...
>> }
>>
>> Is there a specific PV like '$null' or a specific keyword?
>>
>>
>> No, you have to live with the warning.
>> In most cases infinite loops are a bug and hence we better have the
>> warning (this is a sip router and not a general programing language).
>>
>> Andrei
>>
>>
>>
>> _______________________________________________
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>> sr-dev at lists.sip-router.org
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>>
>>
>> --
>> Daniel-Constantin Mierla * http://www.asipto.com/ *
>> http://twitter.com/miconda *
>> http://www.linkedin.com/in/danielconstantinmierla
>