X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=src%2Faggregates.lisp;h=f02f2033e29dfbd460927cca138eb844d7877302;hb=5d4295830e68c889ba2df9d9f88e896a70f20d7a;hp=c6624074dd2a07baeaa46bbad95da468bd32ef89;hpb=b8e666e0f483efdec2f13eb5e1cdd0b06f700191;p=uffi.git

diff --git a/src/aggregates.lisp b/src/aggregates.lisp
index c662407..f02f203 100644
--- a/src/aggregates.lisp
+++ b/src/aggregates.lisp
@@ -226,18 +226,30 @@ of the enum-name name, separator-string, and field-name"
       (declare (fixnum i))
       (setf (aref a i) (uffi:deref-array s '(:array :unsigned-byte) i)))))
 
+#+sbcl
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (sb-ext:without-package-locks
+      (defvar *system-copy-fn* (if (fboundp (intern "COPY-FROM-SYSTEM-AREA" "SB-KERNEL"))
+				   (intern "COPY-FROM-SYSTEM-AREA" "SB-KERNEL")
+				   (intern "COPY-UB8-FROM-SYSTEM-AREA" "SB-KERNEL")))
+    (defconstant +system-copy-offset+ (if (fboundp (intern "COPY-FROM-SYSTEM-AREA" "SB-KERNEL"))
+					  (* sb-vm:vector-data-offset sb-vm:n-word-bits)
+					  0))
+    (defconstant +system-copy-multiplier+ (if (fboundp (intern "COPY-FROM-SYSTEM-AREA" "SB-KERNEL"))
+					      sb-vm:n-byte-bits
+					      1))))
+  
+
 #+sbcl
 (defun convert-from-foreign-usb8 (s len)
   (let ((sap (sb-alien:alien-sap s)))
     (declare (type sb-sys:system-area-pointer sap))
     (locally
-	(declare (optimize (speed 3) (safety 0)))
-      (let ((result (make-array len :element-type '(unsigned-byte 8))))
-	(sb-kernel:copy-from-system-area sap 0
-					 result (* sb-vm:vector-data-offset
-						   sb-vm:n-word-bits)
-					 (* len sb-vm:n-byte-bits))
-	result))))
+     (declare (optimize (speed 3) (safety 0)))
+     (let ((result (make-array len :element-type '(unsigned-byte 8))))
+       (funcall *system-copy-fn* sap 0 result +system-copy-offset+
+		(* len +system-copy-multiplier+))
+       result))))
 
 #+cmu
 (defun convert-from-foreign-usb8 (s len)