April 1998
- Persistant storage.... My current idea. J C Lawrence
- Persistant storage.... My current idea. J C Lawrence
- Persistant storage.... My current idea. Chris Gray
- Persistant storage.... My current idea. J C Lawrence
- Persistant storage.... My current idea. J C Lawrence
- OT: This is a test of a system config change. coder@ibm.net
- MUD Development Digest Dr. Cat
- MUD Development Digest Justin McKinnerney
- MUD Development Digest Nathan F Yospe
- MUD Development Digest Justin McKinnerney
- MUD Development Digest J C Lawrence
- MUD Development Digest J C Lawrence
- MUD Development Digest Jon A. Lambert
- MUD Development Digest Chris Gray
- MUD Development Digest J C Lawrence
- MUD Development Digest J C Lawrence
- MUD Development Digest J C Lawrence
- MUD Development Digest Ben Greear
- MUD Development Digest Jon A. Lambert
- MUD Development Digest Chris Gray
- MUD Development Digest Ben Greear
- MUD Development Digest Dr. Cat
- MUD Development Digest Ben Greear
- MUD Development Digest Justin McKinnerney
- MUD Development Digest Dr. Cat
- MUD Development Digest Justin McKinnerney
- MUD Development Digest Dr. Cat
- MUD Development Digest J C Lawrence
- MUD Development Digest Matt Chatterley
- MUD Development Digest J C Lawrence
- GRUMPS maddog@best.com
- caved in: Algorithms for for storing free space. Ben Greear
- internet connections Chris Gray
- GRUPMS? Vadim Tkachenko
- [Fwd: MUD-Dev] Richard Woolcock
- [Fwd: MUD-Dev] Nathan F Yospe
- [Fwd: MUD-Dev] coder@ibm.net
- [Fwd: MUD-Dev] Katrina McClelan
- [Fwd: MUD-Dev] Richard Woolcock
- [Fwd: MUD-Dev] J C Lawrence
- [Fwd: MUD-Dev] Travis S. Casey
- [Fwd: MUD-Dev] maddog@best.com
- [Fwd: MUD-Dev] J C Lawrence
- [Fwd: MUD-Dev] J C Lawrence
- [Fwd: MUD-Dev] Jon A. Lambert
- [Fwd: MUD-Dev] Richard Woolcock
- Meta: who dat guy, wot dat web? coder@ibm.net
- Meta: who dat guy, wot dat web? Katrina McClelan
- Meta: who dat guy, wot dat web? s001gmu@nova.wright.edu
- Meta: who dat guy, wot dat web? J C Lawrence
- Meta: who dat guy, wot dat web? Jon A. Lambert
- Meta: who dat guy, wot dat web? J C Lawrence
- [META] Mailing lists Katrina McClelan
- [META] Mailing lists Travis S. Casey
- META: The web presence and wot it ain't gonna be J C Lawrence
- META: The web presence and wot it ain't gonna be Shawn Halpenny
- META: The web presence and wot it ain't gonna be J C Lawrence
- META: The web presence and wot it ain't gonna be J C Lawrence
- (fwd) code for teleport coder@ibm.net
- (fwd) code for teleport Ben Greear
- (fwd) code for teleport s001gmu@nova.wright.edu
- (fwd) code for teleport J C Lawrence
- META: Archive of Megami/Wout's list's traffic? Archive of the CC: list? J C Lawrence
- Resisting Charm or you're cute and nice, but not to die for. Jon A. Lambert
- Resisting Charm or you're cute and nice, but not to die for. s001gmu@nova.wright.edu
- Resisting Charm or you're cute and nice, but not to die for. Katrina McClelan
- Resisting Charm or you're cute and nice, but not to die for. J C Lawrence
- Genetic Algorithms Jon A. Lambert
- MUD Development Digest J C Lawrence
- MUD Development Digest Alex Oren
- MUD Development Digest Chris Gray
- MUD Development Digest Jon Leonard
- MUD Development Digest Jon A. Lambert
- Resisting Charm or you're cute and nice, but not Jon A. Lambert
- Unreal J C Lawrence
- META: The web archives are up for review (alpha 1) J C Lawrence
- META: Archive of Megami/Wout's list's traffic? Archive of Alex Oren
- RGMA Alex Oren
- META: That bloke Yaltec. Khan one
- META: That bloke Yaltec. J C Lawrence
- a fruitful exchange on classlessness in r.g.m.admin Cimri
- MAGE 2 MAGE v. 0.88 J C Lawrence
- META: membership (was a fruitful exchange on classlessness in r.g.m.admin) coder@ibm.net
- META: Archive of Megami/Wout's list's traffic? Archive of Wout Mertens
- (fwd) Development of new code base coder@ibm.net
- Seductions of Sim: Policy as a Simulation Jon A. Lambert
- Seductions of Sim: Policy as a Simulation J C Lawrence
- META: membership (was a fruitful exchange on clas Jon A. Lambert
- Resisting Charm or you're cute and nice, but not t Jon A. Lambert
- META: Web futures and the demise of MUD civilisation as we know it. coder@ibm.net
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! Caliban Tiresias Darklock
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! Richard Woolcock
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! Vadim Tkachenko
- There can be.. only ONE! Jon A. Lambert
- There can be.. only ONE! Vadim Tkachenko
- There can be.. only ONE! Jon A. Lambert
- There can be.. only ONE! Richard Woolcock
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! Ling
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! Matt Chatterley
- There can be.. only ONE! J C Lawrence
- There can be.. only ONE! J C Lawrence
- OT: Caballah [was Character development] Alex Oren
- OT: Caballah [was Character development] Caliban Tiresias Darklock
- OT: Caballah [was Character development] Vadim Tkachenko
- OT: Caballah [was Character development] Vadim Tkachenko
- OT: Caballah [was Character development] Marian Griffith
- OT: Caballah [was Character development] Jon A. Lambert
- Personality modelling Oliver Jowett
- Personality modelling J C Lawrence
- Personality modelling J C Lawrence
- META: membership Holly Sommer
- META: membership Cimri
- META: membership s001gmu@nova.wright.edu
- META: membership Katrina McClelan
- META: Other mailing lists Alex Oren
- META: Other mailing lists J C Lawrence
- META: Web site backgrounds and readability J C Lawrence
- META: Web site backgrounds and readability Cimri
- META: Web site backgrounds and readability Holly Sommer
- META: Web site backgrounds and readability plateau
- META: Web site backgrounds and readability Vadim Tkachenko
- META: Web site backgrounds and readability Caliban Tiresias Darklock
- META: Web site backgrounds and readability Vadim Tkachenko
- META: Web site backgrounds and readability Greg Munt
- META: Web site backgrounds and readability J C Lawrence
- META: Web site backgrounds and readability Caliban Tiresias Darklock
- META: Web site backgrounds and readability Matt Chatterley
- META: Web site backgrounds and readability Holly Sommer
- META: Web site backgrounds and readability Jon A. Lambert
- META: Web site backgrounds and readability Caliban Tiresias Darklock
- META: Web site backgrounds and readability Jon A. Lambert
- META: Web site backgrounds and readability J C Lawrence
- META: Archive message format J C Lawrence
- (fwd) equipment J C Lawrence
- 3D evaluation? J C Lawrence
- META: Archive searching now works... J C Lawrence
- META: Archive searching now works... Bruce Mitchener
- META: Archive searching now works... J C Lawrence
- Fw: [DESIGN] Combat system Richard Woolcock
- [Fwd: Grids and curvature of a sphere] Richard Woolcock
- [Fwd: Grids and curvature of a sphere] Caliban Tiresias Darklock
- [Fwd: Grids and curvature of a sphere] J C Lawrence
- [Fwd: Grids and curvature of a sphere] J C Lawrence
- SfD: AI and muds; several approaches Nathan F Yospe
- META: We have moved. J C Lawrence
- (fwd) Mudlib Design J C Lawrence
- (fwd) SERVER: New Code Base in VB Started J C Lawrence
- (fwd) SERVER: New Code Base in VB Started Jon A. Lambert
- Graphical MUD project (Sea Of Blood) J C Lawrence
- (fwd) Sea of Blood Graphical MUD J C Lawrence
- MAPPING: Creating a bitmaped graphic from map coordinates John Bertoglio
- MAPPING: Creating a bitmaped graphic from map coordinates Nathan F Yospe
- MAPPING: Creating a bitmaped graphic from map coordinates John Bertoglio
- MAPPING: Creating a bitmaped graphic from map coordinates s001gmu@nova.wright.edu
- MAPPING: Creating a bitmaped graphic from map coordinates Jon Leonard
- MAPPING: Creating a bitmaped graphic from map coordinates Caliban Tiresias Darklock
- MAPPING: Creating a bitmaped graphic from map coordinates J C Lawrence
- MAPPING: Creating a bitmaped graphic from map coordinates Vadim Tkachenko
- Gentle Reminder J C Lawrence
- Systems you use Ling
- Systems you use Caliban Tiresias Darklock
- Systems you use J C Lawrence
- Systems you use Adam Wiggins
- Systems you use Jon A. Lambert
- Systems you use Katrina McClelan
- Systems you use J C Lawrence
- Systems you use Katrina McClelan
- (fwd) CODE RELEASE: [client] Jcrossclient - java client to "crossfire" J C Lawrence
- Teamwork Ling
- Teamwork J C Lawrence
- MAPPING: Creating a bitmaped graphic from map Jon A. Lambert
- MAPPING: Creating a bitmaped graphic from map J C Lawrence
- MAPPING: Creating a bitmaped graphic from map Jon A. Lambert
- MAPPING: Creating a bitmaped graphic from map John Bertoglio
- MAPPING: Creating a bitmaped graphic from map Jon A. Lambert
- MAPPING: Creating a bitmaped graphic from map Caliban Tiresias Darklock
- MAPPING: Creating a bitmaped graphic from map Jon A. Lambert
- (fwd) AD: [custom graphical] whitestar Crossfire MUD J C Lawrence
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Dr. Cat
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Ben Greear
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Matt Chatterley
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Chris Gray
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Dr. Cat
- (fwd) AD: [custom graphical] whitestar Crossfire MUD J C Lawrence
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Jay Sax
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Dr. Cat
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Caliban Tiresias Darklock
- (fwd) AD: [custom graphical] whitestar Crossfire MUD J C Lawrence
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Matt Chatterley
- (fwd) AD: [custom graphical] whitestar Crossfire MUD Chris Gray
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) J C Lawrence
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) Adam Wiggins
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) J C Lawrence
- There can be.. only ONE! (fwd) J C Lawrence
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) J C Lawrence
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) J C Lawrence
- There can be.. only ONE! (fwd) Matt Chatterley
- There can be.. only ONE! (fwd) Jon A. Lambert
- There can be.. only ONE! (fwd) J C Lawrence
- There can be.. only ONE! (fwd) Matt Chatterley
- How to represent a 3d object... Ben Greear
- How to represent a 3d object... Oliver Jowett
- How to represent a 3d object... Ben Greear
- How to represent a 3d object... Justin McKinnerney
- How to represent a 3d object... J C Lawrence
- fwd Room descriptions, was Roleplaying John Bertoglio
- fwd Room descriptions, was Roleplaying Chris Gray
- fwd Room descriptions, was Roleplaying Ling
- fwd Room descriptions, was Roleplaying J C Lawrence
- Room descriptions, was Roleplaying Richard Woolcock
- Room descriptions, was Roleplaying John Bertoglio
- Java for Mud Client (Crossfire MUD topic) Justin McKinnerney
- Java for Mud Client (Crossfire MUD topic) Joel Dillon
- Java for Mud Client (Crossfire MUD topic) Justin McKinnerney
- Java for Mud Client (Crossfire MUD topic) Joel Dillon
- Java for Mud Client (Crossfire MUD topic) s001gmu@nova.wright.edu
- Java for Mud Client (Crossfire MUD topic) J C Lawrence
- Java for Mud Client (Crossfire MUD topic) J C Lawrence
- Java for Mud Client (Crossfire MUD topic) Ben Greear
- Java for Mud Client (Crossfire MUD topic) J C Lawrence
- META: mud-dev@null.net is now decommissioned. J C Lawrence
- META: mud-dev@null.net is now decommissioned. John Bertoglio
- META: mud-dev@null.net is now decommissioned. J C Lawrence
- Group mechanics/Leadership [was: Room descriptions] Shawn Halpenny
- Group mechanics/Leadership [was: Room descriptions] John Bertoglio
- (fwd) [DESIGN] Macro semi-language J C Lawrence
- (fwd) [DESIGN] Macro semi-language J C Lawrence
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) J C Lawrence
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) Dr. Cat
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) Marian Griffith
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) J C Lawrence
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) Chris Gray
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) Koster, Raph
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) Adam Wiggins
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) J C Lawrence
- OT: Birth announcement Koster, Raph
- OT: Birth announcement Nathan F Yospe
- OT: Birth announcement J C Lawrence
- OT: Birth announcement J C Lawrence
- OT: Birth announcement John Bertoglio
- OT: Birth announcement J C Lawrence
- OT: Birth announcement Jon A. Lambert
- OT: Birth announcement Koster, Raph
- (fwd) POLL: Games ruined by bad players (Playe Jon A. Lambert
- (fwd) POLL: Games ruined by bad players (Playe Dr. Cat
- (fwd) POLL: Games ruined by bad players (Playe J C Lawrence
- (fwd) POLL: Games ruined by bad players (Playe Dr. Cat
- (fwd) POLL: Games ruined by bad players (Playe J C Lawrence
- (fwd) POLL: Games ruined by bad players (Playe Richard Woolcock
- Some thoughts on languages and users - was: Macro semi Jon A. Lambert
- PK's: A solution? John Bertoglio
- PK's: A solution? Shawn Halpenny
- PK's: A solution? Michael Hohensee
- PK's: A solution? s001gmu@nova.wright.edu
- PK's: A solution? J C Lawrence
- PK's: A solution? Katrina McClelan
- PK's: A solution? John Bertoglio
- PK's: A solution? Holly Sommer
- PK's: A solution? J C Lawrence
- PK's: A solution? John Bertoglio
- META: Membership authentication J C Lawrence
- (fwd) MOB or player? Global Communications on Muds J C Lawrence
- (fwd) MOB or player? Global Communications on Muds John Bertoglio
- (fwd) Confusing? J C Lawrence
- (fwd) Confusing? Chris Gray
- (fwd) POLL: Games ruined by bad players (Player killers, tank rushers etc) J C Lawrence
- PK and my "Mobless MUD" idea Jay Sax
- PK and my "Mobless MUD" idea Caliban Tiresias Darklock
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea Chris Gray
- PK and my "Mobless MUD" idea Ling
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea Marian Griffith
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea Koster, Raph
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea Jon A. Lambert
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Koster, Raph
- PK and my "Mobless MUD" idea Marian Griffith
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea Marian Griffith
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Marian Griffith
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Alex Oren
- PK and my "Mobless MUD" idea Jon A. Lambert
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea Dr. Cat
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea s001gmu@nova.wright.edu
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea Marian Griffith
- PK and my "Mobless MUD" idea Koster, Raph
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Caliban Tiresias Darklock
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea Caliban Tiresias Darklock
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea John Bertoglio
- PK and my "Mobless MUD" idea J C Lawrence
- PK and my "Mobless MUD" idea Adam Wiggins
- PK and my "Mobless MUD" idea Marian Griffith
- PK and my "Mobless MUD" idea John Bertoglio
- META: Mail archives and MIME attachments J C Lawrence
- META: Mail archives and MIME attachments Jon A. Lambert
- Bio of John Bertoglio J C Lawrence
- Reuters: Cheaters Never Prosper J C Lawrence
- Correction s001gmu@nova.wright.edu
- Supporting articles found for UOL play style J C Lawrence
- Supporting articles found for UOL play style John Bertoglio
- Supporting articles found for UOL play style J C Lawrence
- Supporting articles found for UOL play style John Bertoglio
- Supporting articles found for UOL play style Koster, Raph
- Supporting articles found for UOL play style J C Lawrence
- Supporting articles found for UOL play style Koster, Raph
- Mud-Client, and specifically, COOLMud and SFWhite Jay Sax
- regulating player-created objects Dan Shiovitz
- regulating player-created objects Adam Wiggins
- regulating player-created objects Dan Shiovitz
- regulating player-created objects Adam Wiggins
- regulating player-created objects s001gmu@nova.wright.edu
- regulating player-created objects Brandon J. Rickman
- regulating player-created objects Marian Griffith
- regulating player-created objects Brandon J. Rickman
- regulating player-created objects Adam Wiggins
- regulating player-created objects Brandon J. Rickman
- regulating player-created objects Adam Wiggins
- regulating player-created objects Brandon J. Rickman
- regulating player-created objects Adam Wiggins
- regulating player-created objects Nathan F Yospe
- regulating player-created objects Nathan F Yospe
- regulating player-created objects Nathan F Yospe
- regulating player-created objects Dan Shiovitz
- regulating player-created objects Shawn Halpenny
- regulating player-created objects J C Lawrence
- regulating player-created objects J C Lawrence
- regulating player-created objects John Bertoglio
- atomic functions Felix A. Croes
- atomic functions Shawn Halpenny
- atomic functions Felix A. Croes
- atomic functions Shawn Halpenny
- atomic functions Jon A. Lambert
- atomic functions Felix A. Croes
- atomic functions Jon A. Lambert
- atomic functions Felix A. Croes
- atomic functions Jon A. Lambert
- atomic functions Felix A. Croes
- atomic functions Jon A. Lambert
- atomic functions Felix A. Croes
- atomic functions J C Lawrence
- atomic functions Felix A. Croes
- atomic functions J C Lawrence
- atomic functions J C Lawrence
- atomic functions Felix A. Croes
Shawn Halpenny <malachai@iname.com> wrote:
> On Fri, May 01, 1998 at 03:11:58PM +0200, Felix A. Croes wrote:
>[...]
> > To transplant the idea of atomic functions to your model, in which
> > functions are already implicitly atomic, make the following change:
> > rather than
> >
> > atomic foo()
> > {
> > /* code of foo */
> > }
> >
> > use
> >
> > foo()
> > {
> > /* code fragment 1 */
> >
> > atomic {
> > /* code fragment 2, executed atomically */
> > }
> >
> > /* code fragment 3 */
> > }
>
> So atomic fragments are akin to critical sections?
They are similar, though critical sections are handled differently in
my server. They are run with "infinite" resources -- that is, the event
will not run out of ticks or stack frames while in the critical section.
Obviously, the use of critical sections cannot be allowed to guest-
programmers on a mud, which is one of my reasons for considering to
add relatively harmless atomic functions/fragments.
>[...]
> If you are moving toward a lockless DB scheme, will you still require
> atomic fragments? If you have a 1-to-1 mapping between thread and event,
> do the atomic sections only come into play when multiple events are
> executing the same method? Currently, I've got each method executing in
> its own stack with local copies of all data.
At present, my server does not have atomic functions/fragments/sections
(I rather like "sections"!) at all. I mean to add multi-threading
similar to yours: events work on a local copy of data and upon
completion either commit the changes or fail, depending on whether
other events already committed changes to the same data meanwhile.
However, function calls occur within the current event and do not
start a new one, and runtime errors do not cause the current event to
fail.
My reasons for considering to add atomic sections as a feature are:
1) I find them desirable.
2) after going multi-threaded as outlined above, they will be trivial
to implement.
> Explicitly defining an atomic function would require more programmer
> work. In a free user programming environment, I don't want to require
> people to decide whether the function they just wrote to make their
> sword talk needs to be atomic or have atomic sections within it. For
> now, I'm opting to leave it up to the server to decide the atomicity of
> things (which it does by way of the event and DB models). An
> experienced programmer can probably outdo the server if given the
> capability to declare atomic blocks, but a newbie would be more
> inclined to either not declare them at all (in which case, I'd have to
> rely on a system like I've already got in mind) or declare them poorly
> and result in performance worse than the server would obtain doing it
> itself.
Critical code exists, and a programmer may decide to protect it.
To the programmer who makes that decision, atomic sections will be
a lot easier to use and comprehend than the various checks that
would have to be made to ensure that the code will be executed
either as a whole or not at all. Implementing atomic sections as
atomic functions is done to make this easy (no new code structure
to learn).
Being able to nest atomic sections is important to me.
The performance hit does not bother me. On a mud with programming
guests, there is no real protection against someone executing an
infinite loop. Rather, ensure that costly code is actually made
costly to use: double the amount of ticks spent while executing
atomic sections, and implement per-programmer tick quotas.
Can your solution of letting runtime errors cancel the current
event deal with the following case:
foo()
{
A();
if B() succeeds then
C();
else
D();
}
with the requirement that A() and C() together, or A() and D()
together must be executed atomically?
> > > I would consider each executing
> > > event method an atomic function as you've described them--all of the
> > > effects undone on failed C&C reset the world state for that event to
> > > the new current state. A runtime error in a function essentially
> > > amounts to a failed C&C, since the end result is the same: no changes
> > > persist. However, a failed function will cause the event method in
> > > which it was called to not be rescheduled and thus it will not attempt
> > > to C&C again. A C&C failure without a corresponding function error is
> > > perfectly acceptable and, in fact, required.
> >
> > In this model, atomic code fragments would still be useless, since
> > an error in an atomic fragment would cancel the entire event. To
> > make them meaningful, you would need a way to (optionally) catch
> > errors in an event. That way, individual bits of atomic code could
> > fail without the entire event failing.
>
> What happens if there is an error in an atomic fragment, and the rest of
> the event requires a result out of that fragment?
The event fails to obtain this result. It may either catch the error
and perform some alternative action, or complete (and eventually commit)
with an error. I do not consider this to be a problem. Rather, I
think that events which do not disappear when an error occurs facilitate
debugging. :)
>[...]
> One different thing about the system I'm describing is that
> events using an intersecting working set don't know that they will fail and
> be rescheduled until they all try and C&C. This is where atomic fragments
> could be beneficial since the working set modifications could take place
> inside them, waiting on other events as required. My approach: if an
> event succeeds C&C, other events with intersecting working sets are
> notified and immediately rescheduled, rather than waiting until they are
> try (and assuredly fail) C&C. (This has been on the list before, too).
>
> This way, I'm not redoing operations I've already performed and thrown out
> to the extent I would if the entire event went through its processing
> before finding out it couldn't commit changes.
I am not yet sure whether I want to do this, since finding out which
other still-running events have an intersecting working set may be a
costly operation, and locking would be needed to store the information
in a common spot.
Felix Croes
--
MUD-Dev: Advancing an unrealised future.
- atomic functions J C Lawrence
- atomic functions Felix A. Croes
- atomic functions J C Lawrence
- atomic functions Felix A. Croes
- atomic functions J C Lawrence
- atomic functions Chris Gray
- atomic functions J C Lawrence
- atomic functions Chris Gray
- atomic functions J C Lawrence
- atomic functions Jon A. Lambert
- atomic functions Chris Gray
- atomic functions J C Lawrence
- atomic functions Jon A. Lambert
- atomic functions Felix A. Croes
- atomic functions Joel Dillon
- atomic functions Jon A. Lambert
- atomic functions J C Lawrence
- atomic functions Jon A. Lambert
- atomic functions J C Lawrence
- atomic functions Chris Gray
- atomic functions Jon A. Lambert
- atomic functions Shawn Halpenny
- atomic functions Adam Wiggins
- atomic functions Adam Wiggins
- atomic functions Shawn Halpenny
- atomic functions J C Lawrence
- atomic functions Jon A. Lambert
- atomic functions Chris Gray
- atomic functions J C Lawrence
- atomic functions Felix A. Croes
- atomic functions Shawn Halpenny
- atomic functions Felix A. Croes
- atomic functions Jon A. Lambert
- atomic functions Shawn Halpenny
- atomic functions Jon A. Lambert
- atomic functions J C Lawrence
- Atomic functions Par Winzell
- Atomic Functions Ben
- Atomic functions Felix A. Croes
- (fwd) AD: [custom graphical] whitestar Dr. Cat
- (fwd) AD: [custom graphical] whitestar Caliban Tiresias Darklock
- (fwd) AD: [custom graphical] whitestar Dr. Cat
- (fwd) AD: [custom graphical] whitestar J C Lawrence
- DOOM Gets a Storyline? Holly Sommer
- DOOM Gets a Storyline? Koster, Raph
- META: Filtering suggestions J C Lawrence
- (fwd) AD: [custom graphical] whitestar s001gmu@nova.wright.edu
- (fwd) AD: [custom graphical] whitestar Dr. Cat
- (fwd) AD: [custom graphical] whitestar J C Lawrence
- UO in Wired, was OT: Birth announcement Koster, Raph