Update of /cvsroot/sbcl/sbcl/src/compiler/generic
In directory usw-pr-cvs1:/tmp/cvs-serv26524/src/compiler/generic
Modified Files:
Tag: backend_cleanup_1_branch
utils.lisp
Log Message:
0.7.7.20-backend-cleanup-1.10:
OAOO treatment for WITH-ADJUSTABLE-VECTOR
Index: utils.lisp
===================================================================
RCS file: /cvsroot/sbcl/sbcl/src/compiler/generic/utils.lisp,v
retrieving revision 1.6
retrieving revision 1.6.4.1
diff -u -d -r1.6 -r1.6.4.1
--- utils.lisp 12 Dec 2001 18:33:42 -0000 1.6
+++ utils.lisp 13 Sep 2002 15:54:35 -0000 1.6.4.1
@@ -1,4 +1,5 @@
-;;;; utility functions needed by the back end to generate code
+;;;; utility functions and macros needed by the back end to generate
+;;;; code
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
@@ -58,3 +59,19 @@
(- list-pointer-lowtag)
(* static-fun-index (pad-data-block fdefn-size))
(* fdefn-raw-addr-slot n-word-bytes))))
+
+;;; Various error-code generating helpers
+(defvar *adjustable-vectors* nil)
+
+(defmacro with-adjustable-vector ((var) &rest body)
+ `(let ((,var (or (pop *adjustable-vectors*)
+ (make-array 16
+ :element-type '(unsigned-byte 8)
+ :fill-pointer 0
+ :adjustable t))))
+ (declare (type (vector (unsigned-byte 8) 16) ,var))
+ (setf (fill-pointer ,var) 0)
+ (unwind-protect
+ (progn
+ ,@body)
+ (push ,var *adjustable-vectors*))))
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