(inst move ,n-dst ,n-src))))
(macrolet
- ((frob (op inst shift)
+ ((def (op inst shift)
`(defmacro ,op (object base &optional (offset 0) (lowtag 0))
`(inst ,',inst ,object ,base (- (ash ,offset ,,shift) ,lowtag)))))
- (frob loadw ld word-shift)
- (frob storew st word-shift))
+ (def loadw ld word-shift)
+ (def storew st word-shift))
(defmacro load-symbol (reg symbol)
`(inst add ,reg null-tn (static-symbol-offset ,symbol)))
Result-TN, and Temp-TN is a non-descriptor temp (which may be randomly used
by the body.) The body is placed inside the PSEUDO-ATOMIC, and presumably
initializes the object."
+ (unless body
+ (bug "empty &body in WITH-FIXED-ALLOCATION"))
(once-only ((result-tn result-tn) (temp-tn temp-tn)
(type-code type-code) (size size))
`(pseudo-atomic (:extra (pad-data-block ,size))
(storew ,temp-tn ,result-tn 0 other-pointer-lowtag)
,@body)))
+(defun align-csp (temp)
+ (let ((aligned (gen-label)))
+ ;; FIXME: why use a TEMP? Why not just ZERO-TN?
+ (inst andcc temp csp-tn lowtag-mask)
+ (if (member :sparc-v9 *backend-subfeatures*)
+ (inst b :eq aligned :pt)
+ (inst b :eq aligned))
+ (storew zero-tn csp-tn 0) ; sneaky use of delay slot
+ (inst add csp-tn csp-tn n-word-bytes)
+ (emit-label aligned)))
\f
;;;; Error Code
(eval-when (:compile-toplevel :load-toplevel :execute)
(inst andcc zero-tn alloc-tn 3)
;; The C code needs to process this correctly and fixup alloc-tn.
(inst t :ne pseudo-atomic-trap)))))
+
+
+(defmacro sb!sys::with-pinned-objects ((&rest objects) &body body)
+ "Arrange with the garbage collector that the pages occupied by
+OBJECTS will not be moved in memory for the duration of BODY.
+Useful for e.g. foreign calls where another thread may trigger
+garbage collection. This is currently implemented by disabling GC"
+ (declare (ignore objects)) ;should we eval these for side-effect?
+ `(without-gcing
+ ,@body))