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List: asterisk-dev
Subject: Re: [asterisk-dev] ast_read and frames of type AST_FRAME_NULL?
From: Klaus Darilion <klaus.mailinglists () pernau ! at>
Date: 2010-06-25 8:35:16
Message-ID: 4C246A44.3030006 () pernau ! at
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I think this thread can be interesting for you:
http://www.mail-archive.com/asterisk-dev@lists.digium.com/msg37785.html
regards
Klaus
Am 24.06.2010 17:15, schrieb Bryan Field-Elliot:
> OK here's a follow-on question:
>
> I've altered my code, such that if ast_waitfor returns 0, it loops around and \
> basically issues another ast_waitfor.
> My ms waitfor time is now 200. Simplified code below:
>
> int empty_counter = 0;
> for (;;) {
> r = ast_waitfor(chan, 200);
> if (r == 0) {
> empty_counter++;
> continue;
> }
> frame = ast_read(chan);
> // ... do some work
> // how long did we wait?
> ast_verb(4, "waitfor returned empty %d times\n", empty_counter);
> }
>
> I'm finding that the empty_counter is climbing into the tens and sometimes hundreds \
> of thousands. This shouldn't be possible if it's waiting 200ms each time. So my \
> follow-on question is -- is there some state that channels might get in, such that \
> ast_waitfor will return immediately rathe than waiting the number of milliseconds \
> specified in its second parameter?
>
>
>
>
> On Jun 22, 2010, at 11:17 PM, Russell Bryant wrote:
>
>
> ----- Original Message -----
> > I think Russell means you're only supposed to call ast_read() if r>
> > 0, not if r == 0. Other places in the code (like app_waitforring.c and
> > app_meetme.c) seem to follow this convention.
>
> Correct.
>
> --
> Russell Bryant
> Digium, Inc. | Engineering Manager, Open Source Software
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> jabber: rbryant@digium.com -=- skype: russell-bryant
> www.digium.com -=- www.asterisk.org -=- blogs.asterisk.org
>
--
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