use new accessors, throw -> ERROR:

basis/concurrency/messaging/messaging.factor

@@ -4,7 +4,7 @@
 ! Concurrency library for Factor, based on Erlang/Termite style
 ! concurrency.
 USING: kernel threads concurrency.mailboxes continuations
-namespaces assocs random ;
+namespaces assocs random accessors ;
 IN: concurrency.messaging
 
 GENERIC: send ( message thread -- )
@@ -45,11 +45,11 @@ TUPLE: synchronous data sender tag ;
 TUPLE: reply data tag ;
 
 : <reply> ( data synchronous -- reply )
-    synchronous-tag \ reply boa ;
+    tag>> \ reply boa ;
 
 : synchronous-reply? ( response synchronous -- ? )
     over reply?
-    [ >r reply-tag r> synchronous-tag = ]
+    [ >r tag>> r> tag>> = ]
     [ 2drop f ] if ;
 
 : send-synchronous ( message thread -- reply )
@@ -58,15 +58,15 @@ TUPLE: reply data tag ;
     ] [
         >r <synchronous> dup r> send
         [ synchronous-reply? ] curry receive-if
-        reply-data
+        data>>
     ] if ;
 
 : reply-synchronous ( message synchronous -- )
-    [ <reply> ] keep synchronous-sender send ;
+    [ <reply> ] keep sender>> send ;
 
 : handle-synchronous ( quot -- )
     receive [
-        synchronous-data swap call
+        data>> swap call
     ] keep reply-synchronous ; inline
 
 <PRIVATE

basis/concurrency/semaphores/semaphores.factor

@@ -1,29 +1,34 @@
 ! Copyright (C) 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: dlists kernel threads math concurrency.conditions
-continuations ;
+continuations accessors summary ;
 IN: concurrency.semaphores
 
 TUPLE: semaphore count threads ;
 
+ERROR: negative-count-semaphore ;
+
+M: negative-count-semaphore summary
+    drop "Cannot have semaphore with negative count" ;
+
 : <semaphore> ( n -- semaphore )
-    dup 0 < [ "Cannot have semaphore with negative count" throw ] when
+    dup 0 < [ negative-count-semaphore ] when
     <dlist> semaphore boa ;
 
 : wait-to-acquire ( semaphore timeout -- )
-    >r semaphore-threads r> "semaphore" wait ;
+    [ threads>> ] dip "semaphore" wait ;
 
 : acquire-timeout ( semaphore timeout -- )
-    over semaphore-count zero?
+    over count>> zero?
     [ dupd wait-to-acquire ] [ drop ] if
-    dup semaphore-count 1- swap set-semaphore-count ;
+    [ 1- ] change-count drop ;
 
 : acquire ( semaphore -- )
     f acquire-timeout ;
 
 : release ( semaphore -- )
-    dup semaphore-count 1+ over set-semaphore-count
-    semaphore-threads notify-1 ;
+    [ 1+ ] change-count
+    threads>> notify-1 ;
 
 : with-semaphore-timeout ( semaphore timeout quot -- )
     pick rot acquire-timeout swap