[SR-Users] About setflag()'s parameter
Daniel-Constantin Mierla
miconda at gmail.com
Tue Jul 6 10:05:35 CEST 2010
Hello,
here is a wiki page with some flag bitmask vector examples that might help:
http://www.kamailio.org/dokuwiki/doku.php/tutorials:openser-flag-operations
The cfg file examples are for older kamailio versions.
Cheers,
Daniel
On 7/6/10 4:02 AM, Alex Balashov wrote:
> On 07/05/2010 09:59 PM, zhou tianjun wrote:
>
>> I'm in doubt of the means of setflag()'s parameter. I have looked for
>> it everywhere including internet and the ser source code, but no any
>> docs explained it in detail. can anybody tell me about it ?
>
> It sets bits in a 32-bit integer (it may be 64-bit on 64-bit
> platforms, of this I am not sure) that is bound to a transaction, so
> those "flags" may be accessed in requests and replies associated with
> a given transaction, or, further down in the execution flow of same
> message handler.
>
> It is precisely equivalent to the way bit vectors are used in
> general-purpose programming languages, e.g.
>
> int flags = 0;
>
> flags |= (1 << 4); /* Set bit 4 */
>
> if(flags & (1 << 4)) {
> printf("Bit 4 is set!\n");
> } else {
> printf("Bit 4 is not set!\n");
> }
>
> /* If bit 4 is set, unset it */
>
> if(flags & (1 << 4))
> flags &= ~(1 << 4);
>
>
--
Daniel-Constantin Mierla
http://www.asipto.com/
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