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Messages - Rovingeye

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Anything else we might add? /

March 18, 2004, 12:35:46 PM

When I talked about performance, I didn't mean the time taken in the call, just that I want to have a single machine running a number of servers for different things, smtp, chat ... and using the current net-select means I am wasting cycles polling the sockets rather than the OS handling things.

Anything else we might add? / Lock server

March 18, 2004, 05:57:21 AM

my first network code was to build a simple socket based lock server, after lots of playing with the file locking stuff I found when I hammerd on it hard it didn't lock properly.

My lock server is a simple newlisp process that handles incoming connections, and a very simple protocol of 'l' for give me a lock, and 'u' for release my lock. The server returns a '1' when you are given a lock, and '0' when its unlocked. I even handled connection being droped with a lock would release the lock to another waiting process. I tired a number of alternative, but it always seemd the lock process was consuming too much cpu resources, either by using the timeout in the select, or a simple sleep. If I increased the timeout/sleep too far the process became unresponsive. (anyone wants the code, let me know)

I would like to experiment with p2p, and clustering, but I'm worried about performance with the current net-select system.

Care should be taken with passing experssions across the network, this is the obvious way to go, but is a very big security risk, unless there is a method in place to check their authenticity.

newLISP in the real world / Too Fast :)

February 26, 2004, 08:28:44 AM

Well I tried it, I think its a little too fast, I had to do it again just to make sure it had done it right the first time.

Very cool

Thanks Again.

Darren

newLISP in the real world / Version 7.5.4 is out

February 25, 2004, 09:32:23 PM

I see the new version is out, I have something to look forward to now when I go into work :)

Thanks

newLISP in the real world / Thank you

February 23, 2004, 01:54:19 PM

Thanks a lot for the very quick response, the code for the scale was some stuff I was playing with at work, and I wanted to wait until I had tried it until I replied.

Well I tried it and it works wonderfully. I have even tweaked things a little, so I can pass back a control id into newlisp so I know which slider was played with :)

The XML performance improvments I look forward too, and will let you know how I get on.

I'm still thinking about the sxml tree access/manipulation. Having written my own library, I have gotten used to a way of doing things that doesn't exactly seem to map to newlisp, but then perhaps I should just take my C/C++ head off :)

newLISP in the real world /

February 19, 2004, 07:38:25 PM

I looked back at the newLisp-tk manuals, and followed the example, but I still seem to get the same problem, everything works fine, upto the point I drag the control, then I get the error I supplied. To me it looks like TK is supplying the value of the control as a parameter, but newlist doesn't expect this.

I will try next week to get the ok to send you some files, the latest one I was playing with was around 650k, newlisp seemed to be taking seconds to read this file instead of msec. I was using your solution to convert the file into an SXML and saving that, once converted the files is much faster to load.

I had some other problems about editing XML trees in memory, but I think after re-reading the manual I could write some helpers that should help ease the pain, and keep the performance, I'll let you know how I get on.

I have been playing around with the blog code, with an eye to using it to build a website. although with my experience gained from playing with the XML I am tempted to switch the file format to SXML.

newLISP in the real world / TK and "scale"(slider) interaction with newlisp

February 19, 2004, 02:46:57 PM

Just like to say I am new to lisp, but seem to have settled with newlisp as a very clean, concise language that is allowing me to get all kinds of work done.

I have one problem, I am new to both lisp, newlisp, and TK, so there is a chance its a silly mistake on my part. On win32 I create a scale control, but when I link it with a -command to newlisp I get:

wrong # args: should be "Newlisp command"

wrong # args: should be "Newlisp command"

while executing

"Newlisp {(set-value)} 0"

(command executed by scale)

I assume (and by playing with the slider) I have found the 0 is the current value of the slide.

Thanks

Darren

P.S.

My only other problem is the xml-parser is way to slow :) I cheat, and convert my xml into s-expression for debugging code. But I would be laughed at if anyone here saw how slow the reader was.