X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=macros.lisp;h=46894ba5e6fc82e3fc728c8cf2ea5688617e8e85;hp=044f1f6b16de173bbb3d5855c43dbb7ed7d65e87;hb=8513c6f273613b0ceb2b48c07da6a0b1803c32a5;hpb=4c379c22b88b4433ed56fd8665e1265442b10ee2

diff --git a/macros.lisp b/macros.lisp
index 044f1f6..46894ba 100644
--- a/macros.lisp
+++ b/macros.lisp
@@ -7,7 +7,7 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: macros.lisp,v 1.5 2003/08/06 11:37:23 kevin Exp $
+;;;; $Id$
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
@@ -187,3 +187,49 @@
       ,@(when docp
 	      `((setf (documentation ',var 'variable) ,doc)))
       (define-symbol-macro ,var ,backing-var))))
+
+(defmacro def-cached-vector (name element-type)
+  (let ((get-name (concat-symbol "get-" name "-vector"))
+	(release-name (concat-symbol "release-" name "-vector"))
+	(table-name (concat-symbol "*cached-" name "-table*"))
+	(lock-name (concat-symbol "*cached-" name "-lock*")))
+    `(eval-when (:compile-toplevel :load-toplevel :execute)
+       (defvar ,table-name (make-hash-table :test 'equal))
+       (defvar ,lock-name (kmrcl::make-lock ,name))
+	 
+	 (defun ,get-name (size)
+	   (kmrcl::with-lock-held (,lock-name)
+	     (let ((buffers (gethash (cons size ,element-type) ,table-name)))
+	       (if buffers
+		   (let ((buffer (pop buffers)))
+		     (setf (gethash (cons size ,element-type) ,table-name) buffers)
+		     buffer)
+		 (make-array size :element-type ,element-type)))))
+	 
+	 (defun ,release-name (buffer)
+	   (kmrcl::with-lock-held (,lock-name)
+	     (let ((buffers (gethash (cons (array-total-size buffer)
+					   ,element-type)
+				     ,table-name)))
+	       (setf (gethash (cons (array-total-size buffer)
+				    ,element-type) ,table-name)
+		 (cons buffer buffers))))))))
+
+(defmacro def-cached-instance (name)
+  (let* ((new-name (concat-symbol "new-" name "-instance"))
+	 (release-name (concat-symbol "release-" name "-instance"))
+	 (cache-name (concat-symbol "*cached-" name "-instance-table*"))
+	 (lock-name (concat-symbol "*cached-" name "-instance-lock*")))
+    `(eval-when (:compile-toplevel :load-toplevel :execute)
+       (defvar ,cache-name nil)
+       (defvar ,lock-name (kmrcl::make-lock ',name))
+	 
+	 (defun ,new-name ()
+	   (kmrcl::with-lock-held (,lock-name)
+	     (if ,cache-name
+		 (pop ,cache-name)
+		 (make-instance ',name))))
+	 
+	 (defun ,release-name (instance)
+	   (kmrcl::with-lock-held (,lock-name)
+	     (push instance ,cache-name))))))