X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fcas.lisp;h=63ff0d96cbf7015801bf20fa9f9dfd223e3c1bc9;hb=d720bc359f03734ccb9baf66cb45dc01d623f369;hp=17e41124c04163f2c8002c0b67ae99adc63d238b;hpb=d0d44ccf079f6ecaadea0616c85d733181634001;p=sbcl.git

diff --git a/src/code/cas.lisp b/src/code/cas.lisp
index 17e4112..63ff0d9 100644
--- a/src/code/cas.lisp
+++ b/src/code/cas.lisp
@@ -8,7 +8,9 @@
 ;;;; DEFCAS, and #'(CAS ...) functions -- making things mostly isomorphic with
 ;;;; SETF.
 
-(defglobal **cas-expanders** (make-hash-table :test #'eq :synchronized t))
+(defglobal **cas-expanders** (make-hash-table :test #'eq
+                                              #-sb-xc-host #-sb-xc-host
+                                              :synchronized t))
 
 (define-function-name-syntax cas (list)
   (destructuring-bind (cas symbol) list
@@ -205,7 +207,8 @@ EXPERIMENTAL: Interface subject to change."
 Two values are considered to match if they are EQ. Returns the previous value
 of PLACE: if the returned value is EQ to OLD, the swap was carried out.
 
-PLACE must be an accessor form whose CAR is one of the following:
+PLACE must be an CAS-able place. Built-in CAS-able places are accessor forms
+whose CAR is one of the following:
 
  CAR, CDR, FIRST, REST, SVREF, SYMBOL-PLIST, SYMBOL-VALUE, SVREF, SLOT-VALUE
  SB-MOP:STANDARD-INSTANCE-ACCESS, SB-MOP:FUNCALLABLE-STANDARD-INSTANCE-ACCESS,
@@ -216,13 +219,15 @@ other then FIXNUM or T.
 
 In case of SLOT-VALUE, if the slot is unbound, SLOT-UNBOUND is called unless
 OLD is EQ to SB-PCL:+SLOT-UNBOUND+ in which case SB-PCL:+SLOT-UNBOUND+ is
-returned and NEW is assigned to the slot.
-
-Additionally, the results are unspecified if there is an applicable method on
-either SB-MOP:SLOT-VALUE-USING-CLASS, (SETF SB-MOP:SLOT-VALUE-USING-CLASS), or
+returned and NEW is assigned to the slot. Additionally, the results are
+unspecified if there is an applicable method on either
+SB-MOP:SLOT-VALUE-USING-CLASS, (SETF SB-MOP:SLOT-VALUE-USING-CLASS), or
 SB-MOP:SLOT-BOUNDP-USING-CLASS.
 
-EXPERIMENTAL: Interface subject to change."
+Additionally, the PLACE can be a anything for which a CAS-expansion has been
+specified using DEFCAS, DEFINE-CAS-EXPANDER, or for which a CAS-function has
+been defined. (See SB-EXT:CAS for more information.)
+"
   `(cas ,place ,old ,new))
 
 ;;; Out-of-line definitions for various primitive cas functions.