Alexei Gradinari 820879415f pjsip: Fix deadlock with suspend taskprocessor on masquerade ...

If both channels which should be masqueraded
are in the same serializer:
1st channel will be locked waiting condition 'complete'
2nd channel will be locked waiting condition 'suspended'

On heavy load system a chance that both channels will be in
the same serializer 'pjsip/distibutor' is very high.

To reproduce compile res_pjsip/pjsip_distributor.c with
DISTRIBUTOR_POOL_SIZE=1

Steps to reproduce:
1. Party A calls Party B (bridged call 'AB')
2. Party B places Party A on hold
3. Party B calls Voicemail app (non-bridged call 'BV')
4. Party B attended transfers Party A to voicemail using REFER.
5. When asterisk masquerades calls 'AB' and 'BV',
   a deadlock is happened.

This patch adds a suspension indicator to the taskprocessor.
When a session suspends/unsuspends the serializer
it sets the indicator to the appropriate state.
The session checks the suspension indicator before
suspend the serializer.

ASTERISK-26145 #close

Change-Id: Iaaebee60013a58c942ba47b1b4930a63e686663b

2016-08-10 15:14:38 -05:00

..

asterisk

pjsip: Fix deadlock with suspend taskprocessor on masquerade

2016-08-10 15:14:38 -05:00

solaris-compat

fix the provided unsetenv for solaris to return an int like it's supposed to

2006-03-29 04:14:12 +00:00

asterisk.h

Produce friendly error when AST_MODULE_SELF_SYM is not defined.

2016-08-08 20:05:34 -05:00

jitterbuf.h

incorporates r159808 from branches/1.4:

2008-11-29 17:57:39 +00:00