1 files changed, 67 insertions, 0 deletions
diff --git a/src/shared/Base.cpp b/src/shared/Base.cpp
new file mode 100644
index 00000000000..9929cd41fdf
--- /dev/null
+++ b/src/shared/Base.cpp
@@ -0,0 +1,67 @@
+/*
+    Base class interface
+    Copyright (C) 1998,1999 by Andrew Zabolotny
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "Base.h"
+
+Base::~Base ()
+{
+}
+
+/**
+ * Decrement object's reference count; as soon as the last reference
+ * to the object is removed, it is destroyed.
+ */
+
+void Base::DecRef ()
+{
+    if (!--RefCount)
+        delete this;
+}
+
+/**
+ * Object initialization. The initial reference count is set to one;
+ * this means if you call DecRef() immediately after creating the object,
+ * it will be destroyed.
+ */
+Base::Base ()
+{
+    RefCount = 1;
+}
+
+/**
+ * Increment reference count.
+ * Every time when you copy a pointer to a object and store it for
+ * later use you MUST call IncRef() on it; this will allow to keep
+ * objects as long as they are referenced by some entity.
+ */
+void Base::IncRef ()
+{
+    ++RefCount;
+
+}
+
+/**
+ * Query number of references to this object.
+ * I would rather prefer to have the reference counter strictly private,
+ * but sometimes, mostly for debugging, such a function can help.
+ */
+int Base::GetRefCount ()
+{
+    return RefCount;
+}