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

[Ovidiu Sas]

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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>
>
> --
> Daniel-Constantin Mierla * http://www.asipto.com/ *
> http://twitter.com/miconda *
> http://www.linkedin.com/in/danielconstantinmierla