* bits/atomic.h atomic*_t types
@ 2003-03-30 23:40 Roland McGrath
0 siblings, 0 replies; only message in thread
From: Roland McGrath @ 2003-03-30 23:40 UTC (permalink / raw)
To: Ulrich Drepper; +Cc: GNU libc hackers
AFAIK the atomic*_t types have not been used for anything yet. There are
no comments on the definitions (bad), so I am guessing what they are for.
Are they intended to be like int_fastNN_t, i.e. a type that is at least
that large and can be accessed atomically? (The existing uses of atomic.h
assume that int and word/pointer size are usable atomically rather than
using these types, which is probably safe.)
All the bits/atomic.h files have copied the verbatim definitions from the
original i386 file. All 4 sizes can be accessed with atomic instructions
on i386. But I believe that on almost all other machines, only one or two
sizes (32 and/or 64 bits) really work. So the definitions should be
changed for most machines, no?
Thanks,
Roland
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2003-03-30 23:33 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-03-30 23:40 bits/atomic.h atomic*_t types Roland McGrath
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).