0.8.3.23

[sbcl.git] / src / compiler / hppa / macros.lisp

diff --git a/src/compiler/hppa/macros.lisp b/src/compiler/hppa/macros.lisp
index d66bdae..d0bebfc 100644 (file)
--- a/src/compiler/hppa/macros.lisp
+++ b/src/compiler/hppa/macros.lisp
@@ -1,3 +1,13 @@
+;;;; various useful macros for generating HPPA code
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
 (in-package "SB!VM")
 
 \f
@@ -77,10 +87,7 @@
 \f
 ;;;; Stack TN's
 
-;;; Load-Stack-TN, Store-Stack-TN  --  Interface
-;;;
-;;;    Move a stack TN to a register and vice-versa.
-;;;
+;;; Move a stack TN to a register and vice-versa.
 (defmacro load-stack-tn (reg stack)
   `(let ((reg ,reg)
         (stack ,stack))
@@ -88,7 +95,6 @@
        (sc-case stack
         ((control-stack)
          (loadw reg cfp-tn offset))))))
-
 (defmacro store-stack-tn (stack reg)
   `(let ((stack ,stack)
         (reg ,reg))
@@ -97,9 +103,6 @@
         ((control-stack)
          (storew reg cfp-tn offset))))))
 
-
-;;; MAYBE-LOAD-STACK-TN  --  Interface
-;;;
 (defmacro maybe-load-stack-tn (reg reg-or-stack)
   "Move the TN Reg-Or-Stack into Reg if it isn't already there."
   (once-only ((n-reg reg)
@@ -133,22 +136,6 @@
 
 \f
 ;;;; Error Code
-
-(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*))))
-
 (eval-when (compile load eval)
   (defun emit-error-break (vop kind code values)
     (let ((vector (gensym)))
@@ -197,8 +184,7 @@
   Emit code for a continuable error with the specified Error-Code and
   context Values.  If the error is continued, execution resumes after
   the GENERATE-CERROR-CODE form."
-  (let ((continue (gensym "CONTINUE-LABEL-"))
-       (error (gensym "ERROR-LABEL-")))
+  (with-unique-names (continue error)
     `(let ((,continue (gen-label)))
        (emit-label ,continue)
        (assemble (*elsewhere*)
@@ -206,21 +192,18 @@
           (emit-label ,error)
           (cerror-call ,vop ,continue ,error-code ,@values)
           ,error)))))
-
-
 \f
-;;; PSEUDO-ATOMIC -- Handy macro for making sequences look atomic.
-;;;
+;;;; PSEUDO-ATOMIC
+
+;;; handy macro for making sequences look atomic
 (defmacro pseudo-atomic ((&key (extra 0)) &rest forms)
   (let ((n-extra (gensym)))
     `(let ((,n-extra ,extra))
        (inst addi 4 alloc-tn alloc-tn)
        ,@forms
        (inst addit (- ,n-extra 4) alloc-tn alloc-tn :od))))
-
-
 \f
-;;;; Indexed references:
+;;;; indexed references
 
 (deftype load/store-index (scale lowtag min-offset
                                 &optional (max-offset min-offset))
@@ -381,3 +364,12 @@
                 object)
           (move value result))))))
 
+
+(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))