Is it freeRTOS safe ?

[rahuldeo2047]

As reallocs might fill up whole memory with fragments.
I want to use it for ESP8266 +IPD or similar string incomings.
Arduino String captures no string.

[mdjarv]

I don't know but feel free to test/review the code and look for any potential issues or improvements. I have not had any memory issues with this myself but I have also not used it extensively