Add semaphore xMqttMutex to protect mqtt->publish() and mqtt->loop() from conflicts with other concurrent threads #2024
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Description:
Protecting
mqtt->publish()
fixed the problem with corruption of MQTT discovery config messages #2012Protecting
mqtt->loop()
seems like good practice since that could potentially conflict with another thread runningmqtt->publish
Note I left
mqtt->connect
unprotected since I think that is unlikely to lead to data corruption or race conditions.Similarly, I left
mqtt->begin
,mqtt->disconnect
,mqtt->stop
,mqtt->subscribe
andmqtt->will
unprotected since they occur either during setup or just prior to esp restart so I think again corruption and race conditions are unlikely.Checklist: