Hey, I’d like to store settings for an embedded product running FreeRTOS. I’ve spent the last 2 hours searching, but all solutions seemed to be a bit too large. LevelDB seemed to be the most compact so far: https://github.com/google/leveldb however there was no FreeRTOS port available I could find. Also seen https://github.com/iondbproject/iondb which looked ok (failing on the string key requirement), but still no FreeRTOS port Is there anything else I missed? All I need is: – key-value storage – a few tens of entries – memory and code size is critical – persistence on either FreeRTOS FAT32, or raw flash, or some other filesystem (feel free to suggest others) – easy cross compilation – the key is preferably a string (as one solution for a generic storage, which can survive updates with code changes, some values might become obsolete and new created) It will basically be used to store a few settings. Any help is greatly appreciated. Thanks, Peter

My first thought was, “That sounds like you want a C++ map” My second thought was, “Can you just wrap a C++ map with a C api and use that?” but you probably have reason that you’re not already doing that (maybe no C++ compiler, dynamic memory allocation issues, etc.) Found this link that might be useful: https://stackoverflow.com/questions/647054/porting-stdmap-to-c Not that if you need re-entrancy / mutual exclusion (use from multiple threads), etc. you’re probably going to have to add that in yourself. Good luck!