This is a collection of library functions I used in multiple go projects. It didn't have a good home so, I collectively put it here.

• Threadsafe fixed-size circular queue
• Random UUIDv4 generator
• mmap(2) reader to read and process very large files in chunks
• Channel backed, fixed-size buffer pool. Unlike sync.Pool, this has a fixed size (set at construction time) and never changes. As a result, when the pool runs out of memory, the caller is blocked until another go-routine frees a buffer.
• Interactive password prompter.