async-io-state-old-length

async-io-state-old-length Function

Summary

Returns the old length of an async-io-state.

Package

comm

Signature

async-io-state-old-length async-io-state => old-length

Arguments

async-io-state⇩

An async-io-state.

Values

old-length⇩

An integer.

Description

The function async-io-state-old-length is used to get the old length of async-io-state. old-length is an integer specifying the length of the old part in the buffer, that is the part that was seen in the previous invocation of the callback in async-io-state-read-with-checking.