1 ;;; Gacela, a GNU Guile extension for fast games development
2 ;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
4 ;;; This program is free software: you can redistribute it and/or modify
5 ;;; it under the terms of the GNU General Public License as published by
6 ;;; the Free Software Foundation, either version 3 of the License, or
7 ;;; (at your option) any later version.
9 ;;; This program is distributed in the hope that it will be useful,
10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ;;; GNU General Public License for more details.
14 ;;; You should have received a copy of the GNU General Public License
15 ;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
18 (define-module (gacela utils)
19 #:use-module (ice-9 session)
20 #:export (use-cache-with
24 ;;; Cache for procedures
25 (define (use-cache-with proc)
26 (let ((cache (make-weak-value-hash-table)))
29 (res (hash-ref cache key)))
32 (set! res (apply proc param))
33 (hash-set! cache key res)
37 ;;; Retrive header definition of a procedure
38 (define (procedure-header proc)
39 (let* ((args (procedure-arguments proc))
40 (name (procedure-name proc))
41 (required (cdar args)))
42 (cons name required)))