1 files changed, 59 insertions, 0 deletions
diff --git a/include/canvas/debug.hxx b/include/canvas/debug.hxx
new file mode 100644
index 000000000000..9fc5ad31711f
--- /dev/null
+++ b/include/canvas/debug.hxx
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_CANVAS_DEBUG_HXX
+#define INCLUDED_CANVAS_DEBUG_HXX
+
+// shared_ptr debugging
+// --------------------
+
+#ifdef BOOST_SP_ENABLE_DEBUG_HOOKS
+
+# include <sal/config.h>
+# include <boost/shared_ptr.hpp>
+
+::std::size_t find_unreachable_objects( bool );
+
+# if OSL_DEBUG_LEVEL > 2
+#  include <osl/diagnose.h>
+#  define SHARED_PTR_LEFTOVERS(a) OSL_TRACE("%s\n%s: Unreachable objects still use %d bytes\n", \
+                                            BOOST_CURRENT_FUNCTION, a, \
+                                            find_unreachable_objects(true) )
+# else
+/** This macro shows how much memory is still used by shared_ptrs
+
+    Use this macro at places in the code where normally all shared_ptr
+    objects should have been deleted. You'll get the number of bytes
+    still contained in those objects, which quite possibly are prevented
+    from deletion by circular references.
+ */
+#  define SHARED_PTR_LEFTOVERS(a) OSL_TRACE("%s\n%s: Unreachable objects still use %d bytes\n", \
+                                            BOOST_CURRENT_FUNCTION, a, \
+                                            find_unreachable_objects(false) )
+# endif
+
+#else
+
+# define SHARED_PTR_LEFTOVERS(a) ((void)0)
+
+#endif
+
+#endif // ! defined(INCLUDED_CANVAS_DEBUG_HXX)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */