thread safe functions
Is there somewhere a list of guile functions that are (/are not) thread safe ? I ask since this morning I was after a strange bug because I was using the format module in two different thread, then learnt that these functions are not reentrant. I'm also interrested in the thread-safeness of gc-stats function. And in general I think this info would be good to have for every functions.
Data Dictionary and Configuration Files with Guile Scheme
Hi,
I'm trying to create a data dictionary [1] to generate code from it. But
since I'm a scheme newbie I was wondering if this is the best method:
{{{
(define-syntax table
(syntax-rules ()
((table name ...)
(list 'table name ...
(define-syntax column
(syntax-rules ()
((column name ...)
(list 'column name ...
(define-syntax type
(syntax-rules ()
((type symbol)
(cons 'type symbol
(define-syntax constraint
(syntax-rules ()
((constraint symbol)
(cons 'constraint symbol
(define-syntax length
(syntax-rules ()
((length value)
(cons 'length value
(define *projects-table*
(table "projects"
(column "id"
(type 'integer) (constraint 'primary-key))
(column "title"
(type 'string) (length 32) (constraint 'not-null
}}}
This way I can write s-exp as in the example *projects-table* an after a
load I will have the data structure ready to work with it.
{{{
scheme@(guile-user)> (load "dd.scm")
scheme@(guile-user)> *projects-table*
(table "projects" (column "id" (type . integer) (constraint .
primary-key)) (column "title" (type . string) (length . 32)
(constraint . not-null)))
}}}
I think this could be a good way to define configuration files too.
What do you think?
Exists better alternatives with Guile?
This mail should go to another list? :-)
Regards,
--
Romel R. Sandoval-Palomo
[1]http://database-programmer.blogspot.com/2008/06/using-data-dictionary.html
Re: Data Dictionary and Configuration Files with Guile Scheme
I would use records instead of lists. I think you can also make the
input much simpler, for instance it might look like this:
(define-table projects
(integer id primary-key)
(string name non-null #:length 32))
On Thu, Aug 5, 2010 at 12:15 PM, Romel Sandoval wrote:
> Hi,
>
> I'm trying to create a data dictionary [1] to generate code from it. But
> since I'm a scheme newbie I was wondering if this is the best method:
>
> {{{
> (define-syntax table
> (syntax-rules ()
> ((table name ...)
> (list 'table name ...
>
> (define-syntax column
> (syntax-rules ()
> ((column name ...)
> (list 'column name ...
>
> (define-syntax type
> (syntax-rules ()
> ((type symbol)
> (cons 'type symbol
>
> (define-syntax constraint
> (syntax-rules ()
> ((constraint symbol)
> (cons 'constraint symbol
>
> (define-syntax length
> (syntax-rules ()
> ((length value)
> (cons 'length value
>
> (define *projects-table*
> (table "projects"
> (column "id"
> (type 'integer) (constraint 'primary-key))
> (column "title"
> (type 'string) (length 32) (constraint 'not-null
> }}}
>
> This way I can write s-exp as in the example *projects-table* an after a
> load I will have the data structure ready to work with it.
>
> {{{
> scheme@(guile-user)> (load "dd.scm")
> scheme@(guile-user)> *projects-table*
> (table "projects" (column "id" (type . integer) (constraint .
> primary-key)) (column "title" (type . string) (length . 32)
> (constraint . not-null)))
> }}}
>
> I think this could be a good way to define configuration files too.
>
> What do you think?
> Exists better alternatives with Guile?
> This mail should go to another list? :-)
>
> Regards,
>
> --
> Romel R. Sandoval-Palomo
>
> [1]http://database-programmer.blogspot.com/2008/06/using-data-dictionary.html
>
>
>
>
>
