X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=macros.lisp;h=5b7286590fa0e18647629f14171e3ffdb3c99a5c;hp=835c6d91bcac3cffabaf49d425fe1a623a02c1d6;hb=e1c2b781af8e10e078ab95920ce0208eb9f5e6bf;hpb=f6555d4ded6e1612ef1042fdbfd8df3c8eb5df18

diff --git a/macros.lisp b/macros.lisp
index 835c6d9..5b72865 100644
--- a/macros.lisp
+++ b/macros.lisp
@@ -187,3 +187,31 @@
       ,@(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))))))))
+