Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
| From | Alexander Terekhov <terekhov@web.de> |
|---|---|
| Newsgroups | comp.std.c, comp.lang.c |
| Subject | Re: The threading specs in the standard: a new catastrophe |
| Date | 2011-07-21 11:56 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <4E27F7D9.7DE4607D@web.de> (permalink) |
| References | (10 earlier) <ivqhl6$h50$1@dont-email.me> <4E21471A.8090703@loria.fr> <87wrfgban1.fsf@catnip.gol.com> <4E248E98.5271CFD2@web.de> <4E25260B.4050507@loria.fr> |
Cross-posted to 2 groups.
Jens Gustedt wrote:
>
> Hello,
>
> Am 07/18/2011 09:50 PM, schrieb Alexander Terekhov:
> > Miles Bader wrote:
> >> The work is already being done, for c++0x atomic support, no?
> >
> > AFAIK, to the extent of
> >
> > http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html
>
> This is already a start, but not the same as implementing the _Atomic
> keyword in C1x, I guess. This goes more in direction of implementing
> the atomic macro/functions by the help of builtins.
>
> You'd have to synthesize the correct arithmetic operations for all
> primitive types for which the compiler is supposed to support _Atomic.
I think that _Atomic keyword sucks miserably. I also don't like
C++0x atomics.
I think that atomic loads and stores ought to support the following
'modes':
Whether load/store is competing (default) or not. Competing load
means that there might be concurrent store (to the same object).
Competing store means that there might be concurrent load or
store. Non-competing load/store can be performed non-atomically.
Whether competing load/store needs remote write atomicity (default
is no remote write atomicity). A remote-write-atomicity-yes load
triggers undefined behaivior in the case of concurrent remote-
write-atomicity-no store.
Whether load/store has specified reordering constraint (default
is no constraint specified) in terms of the following reordering
modes:
Whether preceding loads (in program order) can be reordered
across it (can by default).
Whether preceding stores (in program order) can be reordered
across it (can by default).
Whether subsequent loads (in program order) can be reordered
across it (can by default). For load, the set of constrained
subsequent loads can be limited to only dependant loads (aka
'consume' mode).
Whether subsequent stores (in program order) can be reordered
across it (can by default). For load, there is an implicit
reordering constraint regarding dependent stores (no need to
specify it).
A fence/barrier operation can be used to specify reordering
constraint using basically the same modes.
regards,
alexander.
Back to comp.std.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-07 12:33 +0200
Re: The threading specs in the standard: a new catastrophe Juha Niskanen <juniskan@paju.oulu.fi.nospam> - 2011-07-07 12:46 +0000
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-07 17:26 +0200
Re: The threading specs in the standard: a new catastrophe Todd Carnes <toddcarnes@gmail.com> - 2011-07-07 13:12 +0000
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-07 17:11 +0200
Re: The threading specs in the standard: a new catastrophe lawrence.jones@siemens.com - 2011-07-08 09:23 -0400
Re: The threading specs in the standard: a new catastrophe Todd Carnes <toddcarnes@gmail.com> - 2011-07-08 15:20 +0000
Re: The threading specs in the standard: a new catastrophe "christian.bau" <christian.bau@cbau.wanadoo.co.uk> - 2011-07-07 07:36 -0700
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-07 17:09 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-07 18:00 +0200
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-07 18:20 +0200
Re: The threading specs in the standard: a new catastrophe Wojtek Lerch <wojtek_l@yahoo.ca> - 2011-07-07 12:31 -0400
Re: The threading specs in the standard: a new catastrophe Malcolm McLean <malcolm.mclean5@btinternet.com> - 2011-07-07 09:40 -0700
Re: The threading specs in the standard: a new catastrophe Wojtek Lerch <wojtek_l@yahoo.ca> - 2011-07-07 14:42 -0400
Re: The threading specs in the standard: a new catastrophe Chad <cdalten@gmail.com> - 2011-07-07 12:03 -0700
Re: The threading specs in the standard: a new catastrophe Angel <angel+news@spamcop.net> - 2011-07-07 19:27 +0000
Re: The threading specs in the standard: a new catastrophe Ian Collins <ian-news@hotmail.com> - 2011-07-08 09:14 +1200
Re: The threading specs in the standard: a new catastrophe Wojtek Lerch <wojtek_l@yahoo.ca> - 2011-07-07 23:58 -0400
Re: The threading specs in the standard: a new catastrophe Ian Collins <ian-news@hotmail.com> - 2011-07-08 16:24 +1200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-08 12:14 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-10 00:02 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-10 14:47 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-11 21:05 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-11 22:50 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-11 23:56 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-12 07:50 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-16 01:14 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-16 10:08 +0200
Re: The threading specs in the standard: a new catastrophe Miles Bader <miles@gnu.org> - 2011-07-18 11:11 +0900
Re: The threading specs in the standard: a new catastrophe Alexander Terekhov <terekhov@web.de> - 2011-07-18 21:50 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-19 08:36 +0200
Re: The threading specs in the standard: a new catastrophe Alexander Terekhov <terekhov@web.de> - 2011-07-21 11:56 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-22 20:31 +0200
Re: The threading specs in the standard: a new catastrophe Alexander Terekhov <terekhov@web.de> - 2011-07-22 21:36 +0200
Re: The threading specs in the standard: a new catastrophe Jens Gustedt <Jens.Gustedt@loria.fr> - 2011-07-23 10:50 +0200
Re: The threading specs in the standard: a new catastrophe Alexander Terekhov <terekhov@web.de> - 2011-07-23 20:29 +0200
Re: The threading specs in the standard... Alexander Terekhov <terekhov@web.de> - 2011-08-03 15:50 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-07 23:07 +0200
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-07 23:32 +0200
Re: The threading specs in the standard: a new catastrophe jameskuyper <jameskuyper@gmail.com> - 2011-07-07 15:25 -0700
Re: The threading specs in the standard: a new catastrophe sfuerst <svfuerst@gmail.com> - 2011-07-07 16:12 -0700
Re: The threading specs in the standard: a new catastrophe James Kuyper <jameskuyper@verizon.net> - 2011-07-07 22:41 -0400
Re: The threading specs in the standard: a new catastrophe "Chris M. Thomasson" <cristom@charter.net> - 2011-07-08 12:47 -0700
Re: The threading specs in the standard: a new catastrophe sfuerst <svfuerst@gmail.com> - 2011-07-08 13:11 -0700
Re: The threading specs in the standard: a new catastrophe "Chris M. Thomasson" <cristom@charter.net> - 2011-07-08 16:56 -0700
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-09 23:55 +0200
Re: The threading specs in the standard: a new catastrophe sfuerst <svfuerst@gmail.com> - 2011-07-09 18:40 -0700
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-08 01:16 +0200
some sane words, for sure "Greg A. Woods" <woods@robohack.org> - 2011-07-07 18:33 -0700
Re: The threading specs in the standard: a new catastrophe jameskuyper <jameskuyper@gmail.com> - 2011-07-08 08:34 -0700
Re: The threading specs in the standard: a new catastrophe sfuerst <svfuerst@gmail.com> - 2011-07-08 10:47 -0700
Re: The threading specs in the standard: a new catastrophe James Kuyper <jameskuyper@verizon.net> - 2011-07-09 06:57 -0400
Re: The threading specs in the standard: a new catastrophe Alexander Terekhov <terekhov@web.de> - 2011-07-09 13:59 +0200
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-09 14:45 +0200
Re: The threading specs in the standard: a new catastrophe "Chris M. Thomasson" <cristom@charter.net> - 2011-07-10 15:47 -0700
Re: The threading specs in the standard: a new catastrophe Alexander Terekhov <terekhov@web.de> - 2011-07-11 13:38 +0200
Re: The threading specs in the standard: a new catastrophe Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2011-07-11 16:12 +0300
Re: The threading specs in the standard: a new catastrophe "MikeP" <mp011011@some.org> - 2011-07-07 23:32 -0500
Re: The threading specs in the standard: a new catastrophe lawrence.jones@siemens.com - 2011-07-08 10:09 -0400
Re: The threading specs in the standard: a new catastrophe Shao Miller <sha0.miller@gmail.com> - 2011-07-08 10:31 -0400
Re: The threading specs in the standard: a new catastrophe Tim Rentsch <txr@alumni.caltech.edu> - 2011-07-07 14:32 -0700
Re: The threading specs in the standard: a new catastrophe Shao Miller <sha0.miller@gmail.com> - 2011-07-08 00:38 -0400
Re: The threading specs in the standard: a new catastrophe Ian Collins <ian-news@hotmail.com> - 2011-07-08 17:10 +1200
Re: The threading specs in the standard: a new catastrophe James Kuyper <jameskuyper@verizon.net> - 2011-07-08 07:46 -0400
Re: The threading specs in the standard: a new catastrophe Ian Collins <ian-news@hotmail.com> - 2011-07-08 23:52 +1200
Re: The threading specs in the standard: a new catastrophe James Kuyper <jameskuyper@verizon.net> - 2011-07-08 08:23 -0400
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-08 14:54 +0200
Re: The threading specs in the standard: a new catastrophe Ian Collins <ian-news@hotmail.com> - 2011-07-09 08:26 +1200
Re: The threading specs in the standard: a new catastrophe Seebs <usenet-nospam@seebs.net> - 2011-07-08 14:47 +0000
Re: The threading specs in the standard: a new catastrophe Juha Niskanen <juniskan@paju.oulu.fi.nospam> - 2011-07-08 07:52 +0000
Re: The threading specs in the standard: a new catastrophe jacob navia <jacob@spamsink.net> - 2011-07-09 14:23 +0200
Re: The threading specs in the standard: a new catastrophe Marcin Grzegorczyk <mgrzegor@poczta.onet.pl> - 2011-07-10 00:59 +0200
Re: The threading specs in the standard: a new catastrophe Keith Thompson <kst-u@mib.org> - 2011-07-09 19:05 -0700
csiph-web