Mrozek, Michal 6ffcd51847 Fix race in events scenarios. ...

- It could happen that 2 threads try to update the same event within tree
- First thread starts to submit command, it releases cmdToSubmit
- Second thread doesn't see the command and follows
- Second thread thinks that it submitted the command so it follows to
subsequent steps which are child events notification
- We end up with corrupted enqueue sequence as child may submit prior to
parent.
- With this change each submit step is synchronized basing on task count
- When second thread enters submit command without task count being set
it wait for first thread to properly set it.

Change-Id: Ic2ddaea17f9af8cab6781320edae2c268dd0b189
Signed-off-by: Mrozek, Michal <michal.mrozek@intel.com>

2019-07-09 14:45:07 +02:00

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