*** empty log message ***

doc/ref/ChangeLog

@@ -1,3 +1,8 @@
+2004-01-03  Marius Vollmer  <mvo@zagadka.de>
+
+	* scheme-control.texi: Document the frames stuff and other random
+	changes.
+
 2004-01-04  Kevin Ryde  <user42@zip.com.au>
 
 	* srfi-modules.texi (SRFI-1 Filtering and Partitioning): For partition

libguile/ChangeLog

@@ -1,7 +1,28 @@
+2004-01-03  Marius Vollmer  <mvo@zagadka.de>
+
+	* dynwind.h, scm_dynwind.c (scm_t_frame_flags, scm_t_wind_flags,
+	scm_begin_frame, scm_end_frame, scm_on_unwind, scm_on_rewind):
+	New.
+	(scm_dowinds, scm_i_dowinds): scm_dowinds has been renamed to
+	scm_i_dowinds and extended to handle frames and to invoke a 'turn'
+	function when the outermost wind point has been reached.  The
+	latter is used to copy a continuation stack at the right time.
+	scm_dowinds remains available.
+	(SCM_GUARDSP, SCM_BEFORE_GUARD, SCM_AFTER_GUARD, SCM_GUARD_DATA,
+	tc16_guard, guards_print): Removed.
+	(scm_internal_dynamic_wind): Reimplemented using frames.
+
+	* continuations.c (copy_stack): New, do only the stack copying
+	part of copy_stack_and_call.
+	(copy_stack_and_call): Copy the stack after unwinding and before
+	rewinding.
+	(scm_dynthrow): Do not call scm_dowinds, this is now done by
+	copy_stack_and_call.
+	
 2004-01-04  Kevin Ryde  <user42@zip.com.au>
 
 	* numbers.c (scm_less_p): Don't convert frac to float for compares,
-	can give results due to rounding.
+	can give bad results due to rounding.
 	
 2003-12-26  Marius Vollmer  <mvo@zagadka.de>
 

test-suite/ChangeLog

@@ -1,3 +1,8 @@
+2004-01-03  Marius Vollmer  <mvo@zagadka.de>
+
+	* standalone/test-unwind.c: New test, for the frames stuff.
+	* standalone/Makefile.am: Compile and run it.
+
 2004-01-04  Kevin Ryde  <user42@zip.com.au>
 
 	* tests/exceptions.test (false-if-exception): Add tests.

test-suite/tests/continuations.test

@@ -0,0 +1,54 @@
+;;;;                                                          -*- scheme -*-
+;;;; continuations.test --- test suite for continutations
+;;;;
+;;;; Copyright (C) 2003 Free Software Foundation, Inc.
+;;;; 
+;;;; This program 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, 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 software; see the file COPYING.  If not, write to
+;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+;;;; Boston, MA 02111-1307 USA
+
+(define-module (test-suite test-continuations)
+  :use-module (test-suite lib))
+
+(define (block-reentry body)
+  (let ((active #f))
+    (dynamic-wind
+	(lambda () 
+	  (if active
+	      (throw 'no-reentry)))
+	(lambda ()
+	  (set! active #t)
+	  (body))
+	(lambda () #f))))
+
+(define (catch-tag body)
+  (catch #t
+	 body
+	 (lambda (tag . args) tag)))
+
+(define (check-cont)
+  (catch-tag 
+   (lambda ()
+     (block-reentry (lambda () (call/cc identity))))))
+
+(define (dont-crash-please)
+  (let ((k (check-cont)))
+    (if (procedure? k)
+	(k 12)
+	k)))
+
+(with-test-prefix "continuations"
+
+  (pass-if "throwing to a rewound catch context"
+    (eq? (dont-crash-please) 'no-reentry)))