[Asterisk-code-review] res pjsip contact: Lock expiration/addition of contacts (asterisk[13])

[George Joseph]

Hello Richard Mudgett, Anonymous Coward #1000019,

I'd like you to reexamine a change.  Please visit

    https://gerrit.asterisk.org/2525

to look at the new patch set (#4).

Change subject: res_pjsip contact:  Lock expiration/addition of contacts
......................................................................

res_pjsip contact:  Lock expiration/addition of contacts

Contact expiration can occur in several places:  res_pjsip_registrar,
res_pjsip_registrar_expire, and automatically when anyone calls
ast_sip_location_retrieve_aor_contact.  At the same time, res_pjsip_registrar
may also be attempting to renew or add a contact.  Since none of this was locked
it was possible for one thread to be renewing a contact and another thread to
expire it immediately because it was working off of stale data.  This was the
casue of intermittent registration/inbound/nominal/multiple_contacts test
failures.

Now, the new named lock functionality is used to lock the aor during contact
expire and add operations and res_pjsip_registrar_expire now checks the
expiration with the lock held before deleting the contact.

ASTERISK-25885 #close
Reported-by: Josh Colp

Change-Id: I83d413c46a47796f3ab052ca3b349f21cca47059
---
M include/asterisk/res_pjsip.h
M res/res_pjsip/location.c
M res/res_pjsip_registrar.c
M res/res_pjsip_registrar_expire.c
4 files changed, 143 insertions(+), 17 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/25/2525/4
-- 
To view, visit https://gerrit.asterisk.org/2525
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I83d413c46a47796f3ab052ca3b349f21cca47059
Gerrit-PatchSet: 4
Gerrit-Project: asterisk
Gerrit-Branch: 13
Gerrit-Owner: George Joseph <george.joseph at fairview5.com>
Gerrit-Reviewer: Anonymous Coward #1000019
Gerrit-Reviewer: Richard Mudgett <rmudgett at digium.com>