(setf (aref a i) (uffi:deref-array s '(:array :unsigned-byte) i)))))
#+sbcl
-(let ((copy-fn (if (fboundp (intern "COPY-FROM-SYSTEM-AREA" "SB-KERNEL"))
- (intern "COPY-FROM-SYSTEM-AREA" "SB-KERNEL")
- (intern "COPY-UB8-FROM-SYSTEM" "SB-KERNEL"))))
- (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))))
- (funcall copy-fn sap 0
- result (* sb-vm:vector-data-offset
- sb-vm:n-word-bits)
- (* len sb-vm:n-byte-bits))
- result)))))
+(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))))
+ (funcall *system-copy-fn* sap 0 result +system-copy-offset+
+ (* len +system-copy-multiplier+))
+ result))))
#+cmu
(defun convert-from-foreign-usb8 (s len)