tree d1c577639b14909959b0862c5fa767631174d195
parent 6b1247a16d52be853c18015e7163d60abce5c00a
author Yong Li <yong.b.li@linux.intel.com> 1585143323 +0800
committer Yong Li <yong.b.li@intel.com> 1585273011 +0000

Check if the object is still valid in the timeout callback function

There is a chance that the service will crash
if the sensor threshold is changed.
The root cause is that the timer cancel() API cannot cancel
the already expired callback handlers.
When the callback handler is executed after objects destroyed,
all variables are invalid. Change the object to shared_ptr,
and use a weak_ptr to check if the object is destroyed

Tested:
Change the threshold, to check if there is any service crash log.

Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
Change-Id: I03044e1071285c8dafa78f47e45b14e63aad66fe