can not be used in concurrent situation

[carl-don-it]

the buffer should use some lock or cas to support concurrency

[jjenkov]

Hi - If the buffer introduces a lock of some kind - it will be hurtful to all uses in single-threaded designs - as these will get an uncessary lock overhead.

As a solution I suggest wrapping the non-concurrent buffer inside a concurrent buffer, and guard reads and writes to the buffer with lock calls.