Be careful with spin locks. We used to have one in the ZeroTier core. We pulled it due to a crazy insane bug where it would hang on single core machines and another one where it would run away on CPU usage on massively multicore machines. These bugs had the same cause. Think about it.
Don't use spin locks unless you have profiled and have a clear understanding of the contention factors involved. Also be sure to test on single core and massively multicore.
Also look at whether you can use atomics. Atomics are better than lock guarded things in almost every way. The only time locks beat atomics is when you are updating a bunch of things in which case it may be faster to lock once than to update 10 atomic variables.
Message passing can also win sometimes over concurrent access even if it involves more copying. Profile and think.
Don't use spin locks unless you have profiled and have a clear understanding of the contention factors involved. Also be sure to test on single core and massively multicore.
Also look at whether you can use atomics. Atomics are better than lock guarded things in almost every way. The only time locks beat atomics is when you are updating a bunch of things in which case it may be faster to lock once than to update 10 atomic variables.
Message passing can also win sometimes over concurrent access even if it involves more copying. Profile and think.