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➜ SMAUG
➜ SMAUG coding
➜ Dynamically-Called Functions?
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Dynamically-Called Functions?
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| Posted by
| Orange
United Kingdom (25 posts) Bio
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| Date
| Reply #15 on Wed 01 Jan 2003 12:44 PM (UTC) |
| Message
| | Certainly. You can start debugging and find out which function call is returning NULL. If that's beyond you at the moment then function pointers probably are too. | | Top |
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| Posted by
| Kris
USA (198 posts) Bio
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| Date
| Reply #16 on Wed 01 Jan 2003 07:22 PM (UTC) |
| Message
| log_string is a void function; it's supposed to return NULL. As for the dlopen and such, I have no idea what those are, let alone how to debug them.
It is essential that I get this dynamic function call thing to work. Although I have no experience with that, I can figure it out with a little help hehe. I just want it to work! =)
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| Posted by
| Nick Gammon
Australia (23,173 posts) Bio
Forum Administrator |
| Date
| Reply #17 on Thu 02 Jan 2003 07:50 AM (UTC) |
| Message
| | Do you want to be able to call arbitrary functions, or from a known list? Do they need to share all the address space of the main server? Maybe you can spawn off another process and pipe things to it. |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
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| Posted by
| Kris
USA (198 posts) Bio
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| Date
| Reply #18 on Thu 02 Jan 2003 09:52 AM (UTC) |
| Message
| Ok remember that Secondary Command Processor idea I was spinning around? Ya know, a seperate process; stripped-down version of the mud that shares a bit of memory with the primary mud server. I made a post about it back in October I think.
Two things would have to exist for that to really work (I would distribute it as a snippet if it proved viable). First of all would be the shared memory. That's something I'm still researching, but it looks like it can be done under windows. The second would be the ability to call functions in the other process (i.e. call "send_to_char" from the secondary command processor). In order to do that, the process can send a string to the other process via the shared structure, which would then be used to call the function name equal to that string.
So yah, to make it fully flexible and useful, it would have to be dynamic (or 'arbitrary' as you put it). I.e. I would have to be able to call any function that exists on the other mud, without having to maintain an extensive (and cumbersome) list.
Where should I go from here in order to get the dynamic function thingie to work?
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| Posted by
| Meerclar
USA (733 posts) Bio
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| Date
| Reply #19 on Thu 02 Jan 2003 05:40 PM (UTC) |
| Message
| | What you describe sounds looks like it would require pretty well writing a fullscale mud from scratch simply to handle the function calls from your original world. The *cough* easy *cough* way would be to convert everything to a database and have the sub process handle calls thru the database but even that is going obscenely difficult to accomplish. I rather suspect any speed you gain in doing this will be neglegable under all but the most extreme of circumstances unless yer trying to run your mud on a 486/33SX with 8MB of RAM. Any computer with a pentium processor or better and a decent amount of RAM(128 minimal) should be able to handle the demands of a mud pretty well seamlessly. |
Meerclar - Lord of Cats
Coder, Builder, and Tormenter of Mortals
Stormbringer: Rebirth
storm-bringer.org:4500
www.storm-bringer.org | | Top |
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| Posted by
| Kris
USA (198 posts) Bio
|
| Date
| Reply #20 on Thu 02 Jan 2003 10:07 PM (UTC) |
| Message
| I'm not doing this for speed. One benefit, for example, is the ability to add/change code in the mud without having to shut it down. I'd just have to have the secondary command processor go offline for a few seconds while it recompiles.
It won't require the creation of a new codebase either. I'll add a function that does all the handling/communication with the SCP, which will be called in game_loop of comm.c. That should be easy enough to work through.
Again, the only thing standing in my way is this dynamic function thing! I need to get past this brick wall before I can do anything else.
How can I get this dynamic function call stuff to work under cygwin????
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| Posted by
| Meerclar
USA (733 posts) Bio
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| Date
| Reply #21 on Thu 02 Jan 2003 10:33 PM (UTC) |
| Message
| | You said at one point you have the ability to copyover, why do you need to shutdown to update code? As for making such a project work under Cygwyn, everything I can find seems to indicate it won't work under Cygwin. MSVC should be able to handle it but Cygwin doesnt seem to have the capability to handle the necessary call functions to communicate between the seperate processes. |
Meerclar - Lord of Cats
Coder, Builder, and Tormenter of Mortals
Stormbringer: Rebirth
storm-bringer.org:4500
www.storm-bringer.org | | Top |
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| Posted by
| Nick Gammon
Australia (23,173 posts) Bio
Forum Administrator |
| Date
| Reply #22 on Thu 02 Jan 2003 11:15 PM (UTC) |
| Message
| | Again I think you could do this sort-of by piping requests to a separate process, the separate process could be restarted. Sounds a big job, and I don't have Cygwin with me right now to try ideas out. |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
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| Posted by
| Kris
USA (198 posts) Bio
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| Date
| Reply #23 on Fri 03 Jan 2003 03:15 AM (UTC) |
| Message
| Hmm I'll look around some more about the cygwin function thing. It sounds like a basic enough thing, and I'm sure somebody has to have done it before.
| | Top |
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| Posted by
| Kris
USA (198 posts) Bio
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| Date
| Reply #24 on Fri 03 Jan 2003 04:52 AM (UTC) |
| Message
| Man I'm having trouble just finding an appropriate search pattern.... Skimming through google, I managed to figure out how to do it in about 3 other programming languages, but not C....
Asked over IMC, but the only people who spoke up were Samson and Orion, neither of whom had a clue.
So my frusterating search continues.... I know there HAS to be a way to accomplish this somehow....
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| Posted by
| Samson
USA (683 posts) Bio
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| Date
| Reply #25 on Mon 20 Jan 2003 02:35 AM (UTC) Amended on Mon 20 Jan 2003 02:51 AM (UTC) by Samson
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| Message
| Ever the spin doctor there eh Kris? No, we aren't clueless. It has more to do with the fact that, well, we just don't like you. There. It's been said. Now with that out of the way.... yes, it can be done. You simply weren't willing to do the minimal amount of research needed to uncover your solution. I'm not going to tell you here since you've decided to try and run your smear campaigns again.
To everyone else, apologies for having to vent on him here. I'm sure if you all knew just how much of a pain he's made of himself on IMC over every last little thing, code related or otherwise, you'd understand. | | Top |
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