X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=macros.lisp;h=d0ba63c629d8e698cc011c6072ce82c20e7d604d;hp=044f1f6b16de173bbb3d5855c43dbb7ed7d65e87;hb=68c8a7d41640b4b26c0e088c752fb53703f3c548;hpb=4c379c22b88b4433ed56fd8665e1265442b10ee2

diff --git a/macros.lisp b/macros.lisp
index 044f1f6..d0ba63c 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
 ;;;;
@@ -147,6 +147,15 @@
      ,@body))
 
 
+(defmacro time-seconds (&body body)
+  (let ((t1 (gensym)))
+    `(let ((,t1 (get-internal-real-time)))
+       (values
+	(progn ,@body)
+	(coerce (/ (- (get-internal-real-time) ,t1)
+		   internal-time-units-per-second)
+		'double-float)))))
+  
 (defmacro time-iterations (n &body body)
   (let ((i (gensym))
 	(count (gensym)))
@@ -187,3 +196,84 @@
       ,@(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))))))
+
+(defmacro with-ignore-errors (&rest forms)
+  `(progn
+     ,@(mapcar
+	(lambda (x) (list 'ignore-errors x))
+	forms)))
+
+(defmacro ppmx (form)
+  "Pretty prints the macro expansion of FORM."
+  `(let* ((exp1 (macroexpand-1 ',form))
+	  (exp (macroexpand exp1))
+	  (*print-circle* nil))
+     (cond ((equal exp exp1)
+	    (format t "~&Macro expansion:")
+	    (pprint exp))
+	   (t (format t "~&First step of expansion:")
+	      (pprint exp1)
+	      (format t "~%~%Final expansion:")
+	      (pprint exp)))
+     (format t "~%~%")
+     (values)))
+
+(defmacro defconstant* (sym value &optional doc)
+  "Ensure VALUE is evaluated only once."
+   `(defconstant ,sym (if (boundp ',sym)
+			  (symbol-value ',sym)
+			  ,value)
+     ,@(when doc (list doc))))
+
+(defmacro defvar-unbound (sym &optional (doc ""))
+    "defvar with a documentation string."
+    `(progn
+      (defvar ,sym)
+      (setf (documentation ',sym 'variable) ,doc)))
+