--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/core/breakpoint.h	Thu Aug 02 13:59:08 2007 +0100
@@ -0,0 +1,76 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2006,2007 INESC Porto, INRIA
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Gustavo Carneiro <gjc@inescporto.pt>
+ * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
+ */
+#ifndef BREAKPOINT_H
+#define BREAKPOINT_H
+
+namespace ns3 {
+
+/* Hacker macro to place breakpoints for selected machines.
+ * Actual use is strongly discouraged of course ;)
+ * Copied from GLib 2.12.9.
+ * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
+ * file for a list of people on the GLib Team.  See the ChangeLog
+ * files for a list of changes.  These files are distributed with
+ * GLib at ftp://ftp.gtk.org/pub/gtk/. 
+ */
+
+/**
+ * \ingroup debugging
+ *
+ * Inserts a breakpoint instruction (or equivalent system call) into
+ * the code for selected machines.  When an NS_ASSERT cannot verify its condition, 
+ * this macro is used. Falls back to calling
+ * AssertBreakpoint() for architectures where breakpoint assembly
+ * instructions are not supported.
+ */
+#if (defined (__i386__) || defined (__amd64__) || defined (__x86_64__)) && defined (__GNUC__) && __GNUC__ >= 2
+#  define NS_BREAKPOINT() \
+   do{ __asm__ __volatile__ ("int $03"); }while(false)
+#elif defined (_MSC_VER) && defined (_M_IX86)
+#  define NS_BREAKPOINT() \
+   do{ __asm int 3h }while(false)
+#elif defined (__alpha__) && !defined(__osf__) && defined (__GNUC__) && __GNUC__ >= 2
+#  define NS_BREAKPOINT() \
+   do{ __asm__ __volatile__ ("bpt"); }while(false)
+#else	/* !__i386__ && !__alpha__ */
+#  define NS_BREAKPOINT()    ns3::BreakpointFallback ()
+#endif
+
+/**
+ * \brief fallback breakpoint function
+ *
+ * This function is used by the NS_BREAKPOINT() macro as a fallback
+ * for when breakpoint assembly instructions are not available.  It
+ * attempts to halt program execution either by a raising SIGTRAP, on
+ * unix systems, or by dereferencing a null pointer.
+ * 
+ * Normally you should not call this function directly.
+ */
+void BreakpointFallback (void);
+
+
+}//namespace ns3
+
+
+#endif /* BREAKPOINT_H */