Thread safe debug logging

[bertmelis]

Debug logging isn't thread safe so logging from different tasks results in mangled output on Serial.
It doesn't bother me too much as it is only debug logging.

However, if there is anything I can do in my code to prevent this, I'm happy to know.

I'm using the log_x(__VA_ARGS__) statements from the Arduino core.

[bertmelis]

I've come up with this, don't know if it's the most elegant/straightforward/...

#define my_log_i(...) vPortEnterCritical();log_i(__VA_ARGS__);vPortExitCritical()
// the same for other logging levels

[bertmelis]

Update:

portMUX_TYPE loggingMutex;
vPortCPUInitializeMutex(&loggingMutex);
#define my_log_i(...) vPortEnterCritical(&loggingMutex);log_i(__VA_ARGS__);vPortExitCritical(&loggingMutex)

God knows why it worked last time.