These directories & files provide examples of Go code
implementing different buffers.  Each has its own test code

syncbuf:
	Using classical synchronization mechanisms
	bufi:
		Sequential buffer
	lbuf:
		Using two binary semaphores.  This code is prone to deadlock!
	cvbuf:
		Using condition variables
	
chanbuf:
	Using Go channels

	bufi:
		Sequential buffer
	cbuf:
		Bounded buffer using single channel.  Limited functionality
	abuf:
		Use channels as rendezvous
		Separate channels for blocking vs. nonblocking ops

srvbuf:
	Series of implementations where sequential buffer hidden behind server
	Very Go-like.  Here are the implementations:

	bufi:
		Sequential buffer
	bserver:
		First attempt.  Gets stuck when it encounters blocking operation
	sserver:
		Uses separate channels for reads vs. other requests
	dserver:
		Server manages queue of operations that have been deferred.