wait-for-input-streams-returning-first streams &key wait-function wait-reason timeout => result
A list, each member of which is a socket-stream.
A function of no arguments.
A string.
A real number or nil
.
The function wait-for-input-streams-returning-first
behaves just like wait-for-input-streams except that it returns the first stream in the list streams that is ready for input.
LispWorks User Guide and Reference Manual - 20 Sep 2017