Gambit-list Avril 2007

gambit-list@iro.umontreal.ca

23 participants
47 discussions

Big number Bug?
by dillo gimp 25 Avr '07

25 Avr '07

hi There might be a bug in big number handling, the same code runs fine under mzscheme and petite, but crashes with gambit : *** ERROR IN ##ratnum.* -- Divide by zero (quotient 0 0) I don't even use "quotient" in my code.

2 1

how to use srfi-1?
by dillo gimp 25 Avr '07

25 Avr '07

hi how to use srfi-1? I usually do : (require (lib "list.ss" "srfi" "1")) what do I have to do when using gsc?

2 1

got error from defining a vector?
by dillo gimp 24 Avr '07

24 Avr '07

(define b #(4 0 -8 -5)) /usr/4.0b22/bin/gsc accumu.sc *** ERROR IN "/lfs/scheme/accumu.sc"@946.11 -- Ill-formed expression

3 2

Available module system?
by Huang Jianshi 23 Avr '07

23 Avr '07

Hi, I'm new to Gambit. Could anyone tell me if there's an available module system in Gambit? Cheers, Jianshi Huang

2 4

IO and threads question
by Francois Magnan 23 Avr '07

23 Avr '07

Hi, I have a strange problem with input/output and threads using GambitC-4b22 (WinXP/MINGW). I tried to isolate it. It can be basically reproduced by running the following code in the interpreter: (define (main) (let ((t (make-thread (lambda () (display "\n\n\n hello world!\n\n\n") (force-output))))) (thread-start! t))) (main) Which does the expected thing: display the "hello world" message in the console. If I compile the above program to an executable it doesn't display the message anymore. In my real context, I am using a mutex and many threads are writing a trace to the console. In the compiled version I get no traces... What am I missing? Thank you, Francois Magnan

2 2

Re: [gambit-list] Missing table-delete!/remove!
by TJ 23 Avr '07

23 Avr '07

On 4/23/07, Christian Jaeger <christian(a)pflanze.mine.nu> wrote: > I'm missing a function for removing items from hash tables. Use table-set! without the third argument (the "value" argument). TJ

2 1

Missing table-delete!/remove!
by Christian Jaeger 23 Avr '07

23 Avr '07

Hello I'm missing a function for removing items from hash tables. (SRFI-69 calls it hash-table-delete!, but that SRFI has a different interface at least for table-ref regarding missing values anyways.) Christian.

1 0

Number crunching
by Huang Jianshi 23 Avr '07

23 Avr '07

Hi, I'm new to Gambit. I read the benchmark and Gambit performs on the top of the list. I want to ask if there is any tutorial/manual/ examples on showing how to write efficient code on number crunching task, especially matrix operations and floating point operations. Best, Jianshi Huang

4 4

Trying to build termite with beta 22
by Bradley Lucier 20 Avr '07

20 Avr '07

There have been some attempts to build termite with gambc-4.0b22, and I had tried it earlier without success, so I thought I'd report my attempt more clearly so somebody might be able to help (hi, Guillaume!). Basically, I think the definition of ##make-macro-descr in _eval.scm has changed, so the use of it in termite should be updated. If I'm right, perhaps someone can tell me why I get [brad:~/programs/termite/examples] lucier% gsi cell.scm *** ERROR IN "cell.scm"@21.24 -- Datum or EOF expected after I install gsi+termite. cons.scm at least finishes: [brad:~/programs/termite/examples] lucier% gsi cons.scm #<kons #2> 1 2 (1 . 2) (123 . 2) done Shat start[123].sh are supposed to do is anybody's guess ;-). Brad I used the darcs command at toute.ca to download termite. To debug, I changed termite.scm as follows: [brad:~/programs/termite] lucier% rcsdiff termite.scm =================================================================== RCS file: RCS/termite.scm,v retrieving revision 1.1 diff -r1.1 termite.scm 43c43 < (compile-time-load "termite/match-support.scm") --- > (compile-time-load "match-support.scm") 70a71 > #| 82a84,85 > |# > I put the the time-related stuff in termite-time.scm: (c-declare "#include <time.h>") (define formatted-current-time (c-lambda () char-string "time_t t; struct tm* tm; char str[64]; time(&t); tm = localtime(&t); strftime(str, 64, \"20%y-%m-%d %H:%M:%S\", tm); ___result = str;")) So now I can compile and load termite-time separately and I load termite.scm into the interpreter, and I immediately get: ^C[brad:~/programs/termite] lucier% gsi Gambit Version 4.0 beta 22 > (load "termite-time") "/Users/lucier/programs/termite/termite-time.o1" > (load "termite.scm") *** ERROR IN "match.scm"@6.1 -- Wrong number of arguments passed to procedure (##make-macro-descr -4 '#<procedure #2> #f) 1> Looking at the definition of ##make-macro-descr in _eval.scm, perhaps you need: --- termite.scm 2007/04/19 01:57:02 1.1 +++ termite.scm 2007/04/19 02:11:02 @@ -30,6 +30,7 @@ ##interaction-cte ',(car pattern) (##make-macro-descr + #f ',(form-size (cdr pattern)) ,src #f)))))

3 4

Termite SMP shortcuts?
by Phil Dawes 20 Avr '07

20 Avr '07

Hi All, I was just wondering, given the shared-nothing nature of the termite process model are there any shortcuts that could be taken to get termite running SMP? (as apposed to developing a fully fledged SMP gambit). E.g. maybe running multiple runtimes in the same process but each with separate managed heaps so that the GC doesn't have to worry too much about locking? (as usual, I'm way out of my depth here!) Cheers, Phil

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Gambit-list Avril 2007