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Added deadlock protection to try_suggested_sip_codec in chan_sip.c.

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Review: https://reviewboard.asterisk.org/r/287/


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@202007 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Matthew Nicholson
2009-06-19 21:08:02 +00:00
parent 7a64ad4242
commit 596e8b758c
1 changed files with 14 additions and 2 deletions
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channels/chan_sip.c
+14 -2
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@@ -5823,8 +5823,20 @@ static void try_suggested_sip_codec(struct sip_pvt *p)
int fmt;
const char *codec;
codec = pbx_builtin_getvar_helper(p->owner, "SIP_CODEC");
if (!codec)
while (p->owner && ast_channel_trylock(p->owner)) {
sip_pvt_unlock(p);
sched_yield();
sip_pvt_lock(p);
}
if (!p->owner)
return;
codec = ast_strdupa(S_OR(pbx_builtin_getvar_helper(p->owner, "SIP_CODEC"), ""));
ast_channel_unlock(p->owner);
if (ast_strlen_zero(codec))
return;
fmt = ast_getformatbyname(codec);