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-rw-r--r--libguile/stackchk.h8
1 files changed, 3 insertions, 5 deletions
diff --git a/libguile/stackchk.h b/libguile/stackchk.h
index ed149067b..68dec762f 100644
--- a/libguile/stackchk.h
+++ b/libguile/stackchk.h
@@ -3,7 +3,7 @@
#ifndef SCM_STACKCHK_H
#define SCM_STACKCHK_H
-/* Copyright (C) 1995,1996,1998,2000, 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1998,2000, 2003, 2006, 2008, 2009, 2010 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@@ -37,12 +37,10 @@
#if defined BUILDING_LIBGUILE && defined STACK_CHECKING
# if SCM_STACK_GROWS_UP
# define SCM_STACK_OVERFLOW_P(s)\
- (SCM_STACK_PTR (s) \
- > (SCM_I_CURRENT_THREAD->base + SCM_STACK_LIMIT))
+ ((SCM_STACK_PTR (s) - SCM_I_CURRENT_THREAD->base) > SCM_STACK_LIMIT)
# else
# define SCM_STACK_OVERFLOW_P(s)\
- (SCM_STACK_PTR (s) \
- < (SCM_I_CURRENT_THREAD->base - SCM_STACK_LIMIT))
+ ((SCM_I_CURRENT_THREAD->base - SCM_STACK_PTR (s)) > SCM_STACK_LIMIT)
# endif
# define SCM_CHECK_STACK\
{\