From: utzoo!decvax!cca!dan@BBN-UNIX@sri-unix
Newsgroups: net.unix-wizards
Title: Re: kernel: clist code question
Article-I.D.: sri-unix.1557
Posted: Thu May 27 16:06:21 1982
Received: Sat May 29 06:38:16 1982

From: Dan Franklin 
Date: 26 Apr 1982 11:19:54 EDT (Monday)
Some of the V7 UNIX prim.c routines, in particular ndqb and ndflush,
apparently implement a different kind of clist in which c_cf and c_cl,
rather than pointing to a list of cblocks, point to a single contiguous
block of storage not obtained from cfreelist. In this mode, c_cc is negative.
I don't know why none of the other prim.c routines appear to handle this
case--in particular getc and q_to_b. But most of the routines appear to
have been changed to at least treat such a clist as though it were empty.
It really has the look of something partially implemented, and I don't
know of any kernel code that uses it; does anyone else?