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| -rw-r--r-- | sly/lru-cache.scm | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/sly/lru-cache.scm b/sly/lru-cache.scm deleted file mode 100644 index 1a960a3..0000000 --- a/sly/lru-cache.scm +++ /dev/null @@ -1,54 +0,0 @@ -;;; Sly -;;; Copyright (C) 2014 David Thompson <dthompson2@worcester.edu> -;;; -;;; This program is free software: you can redistribute it and/or -;;; modify it under the terms of the GNU General Public License as -;;; published by the Free Software Foundation, either version 3 of the -;;; License, or (at your option) any later version. -;;; -;;; This program is distributed in the hope that it will be useful, -;;; but WITHOUT ANY WARRANTY; without even the implied warranty of -;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -;;; General Public License for more details. -;;; -;;; You should have received a copy of the GNU General Public License -;;; along with this program. If not, see -;;; <http://www.gnu.org/licenses/>. - -;;; Commentary: -;; -;; Least recently used cache implementation. -;; -;;; Code: - -(define-module (sly lru-cache) - #:use-module (srfi srfi-1) - #:use-module (srfi srfi-9)) - -(define (memoize/lru proc max-size) - (let ((cache (make-hash-table)) - (keys '()) - (size 0)) - (lambda args - (let ((results (hash-ref cache args))) - (if results - (apply values results) - (let ((results (call-with-values (lambda () - (apply proc args)) - list))) - (hash-set! cache args results) - (set! size (1+ size)) - (apply values results))))))) - -(define (memoize proc) - "Return a memoizing version of PROC." - (let ((cache (make-hash-table))) - (lambda args - (let ((results (hash-ref cache args))) - (if results - (apply values results) - (let ((results (call-with-values (lambda () - (apply proc args)) - list))) - (hash-set! cache args results) - (apply values results))))))) |