--- gforth/tasker.fs	1996/03/31 20:16:04	1.1
+++ gforth/tasker.fs	1997/09/13 12:04:59	1.6
@@ -1,5 +1,23 @@
 \ Multitasker                                          19aug94py
 
+\ Copyright (C) 1995-1997 Free Software Foundation, Inc.
+
+\ This file is part of Gforth.
+
+\ Gforth is free software; you can redistribute it and/or
+\ modify it under the terms of the GNU General Public License
+\ as published by the Free Software Foundation; either version 2
+\ of the License, or (at your option) any later version.
+
+\ This program is distributed in the hope that it will be useful,
+\ but WITHOUT ANY WARRANTY; without even the implied warranty of
+\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+\ GNU General Public License for more details.
+
+\ You should have received a copy of the GNU General Public License
+\ along with this program; if not, write to the Free Software
+\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
 Create sleepers  sleepers A, sleepers A, 0 ,
 
 \ LINK-TASK links task1 into the task chain of task2
@@ -23,17 +41,18 @@ Create sleepers  sleepers A, sleepers A,
   lp! fp! rp! prev-task @ sleep ;
 
 \ USER' computes the task offset
-: user' ( 'user' -- n )
-  ' >body @ state @ IF  postpone Literal  THEN ; immediate
+:noname    ' >body @ ;
+:noname    ' >body @ postpone literal ; 
+interpret/compile: user' ( 'user' -- n )
 
 \ NEWTASK creates a new, sleeping task
 : NewTask ( n -- Task )  dup 2* 2* udp @ + dup
   allocate throw  + >r
   r@ over - udp @ - next-task over udp @ move
-  r> over user' r0 + ! dup >r
-  dup r@ user' l0   + ! over -
-  dup r@ user' f0   + ! over -
-  dup r@ user' s0   + ! over -
+  r> over user' rp0 + ! dup >r
+  dup r@ user' lp0   + ! over -
+  dup r@ user' fp0   + ! over -
+  dup r@ user' sp0   + ! over -
   dup r@ user' normal-dp + dup >r !
    r> r@ user' dpp  + ! + $10 +
       r@ user' >tib + !
@@ -45,17 +64,20 @@ Create sleepers  sleepers A, sleepers A,
 
 : (pass) ( x1 .. xn n task -- )  rdrop
   [ ' kill-task >body ] ALiteral r>
-  rot >r r@ user' r0 + @ 2 cells - dup >r 2!
+  rot >r r@ user' rp0 + @ 2 cells - dup >r 2!
   r>              swap 1+
-  r@ user' f0 + @ swap 1+
-  r@ user' l0 + @ swap 1+
-  cells r@ user' s0 + @ tuck swap - dup r@ user' save-task + !
+  r@ user' fp0 + @ swap 1+
+  r@ user' lp0 + @ swap 1+
+  cells r@ user' sp0 + @ tuck swap - dup r@ user' save-task + !
   ?DO  I !  cell  +LOOP  r> wake ;
 
 : activate ( task -- )  0 swap (pass) ;
 : pass ( x1 .. xn n task -- )  (pass) ;
 
-: task-key   BEGIN  pause key?  UNTIL  (key) ;
+: single-tasking? ( -- flag )
+    next-task dup @ = ;
+
+: task-key   BEGIN  pause key? single-tasking? or  UNTIL  (key) ;
 : task-emit  (emit) pause ;
 : task-type  (type) pause ;