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
3 files changed
tree: d1c577639b14909959b0862c5fa767631174d195
  1. cmake/
  2. include/
  3. service_files/
  4. src/
  5. tests/
  6. .clang-format
  7. .clang-ignore
  8. .gitignore
  9. cmake-format.json
  10. CMakeLists.txt
  11. Jenkinsfile
  12. LICENSE
  13. MAINTAINERS
  14. README.md
README.md

dbus-sensors

dbus-sensors is a collection of sensor applications that provide the xyz.openbmc_project.Sensor collection of interfaces. They read sensor values from hwmon, d-bus, or direct driver access to provide readings. Some advance non-sensor features such as fan presence, pwm control, and automatic cpu detection (x86) are also supported.

key features

  • runtime re-configurable from d-bus (entity-manager or the like)

  • isolated: each sensor type is isolated into its own daemon, so a bug in one sensor is unlikely to affect another, and single sensor modifications are possible

  • async single-threaded: uses sdbusplus/asio bindings

  • multiple data inputs: hwmon, d-bus, direct driver access