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Code/Sandbox/Editor/Util/RefCountBase.h

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+/*
+* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+* its licensors.
+*
+* For complete copyright and license terms please see the LICENSE at the root of this
+* distribution (the "License"). All use of this software is governed by the License,
+* or, if provided, by the license below or the license accompanying this file. Do not
+* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+*/
+// Original file Copyright Crytek GMBH or its affiliates, used under license.
+
+// Description : Reference counted base object.
+
+
+#ifndef CRYINCLUDE_EDITOR_UTIL_REFCOUNTBASE_H
+#define CRYINCLUDE_EDITOR_UTIL_REFCOUNTBASE_H
+#pragma once
+
+#include <Include/EditorCoreAPI.h>
+
+//! Derive from this class to get reference counting in your class.
+class EDITOR_CORE_API CRefCountBase
+{
+public:
+    CRefCountBase() {}
+
+    //! Add a new reference to this object.
+    int AddRef()
+    {
+        m_nRefCount++;
+        return m_nRefCount;
+    }
+
+    //! Release reference to this object.
+    //! When the reference count reaches zero, the object is deleted.
+    int Release()
+    {
+        int refs = --m_nRefCount;
+        if (m_nRefCount == 0)
+        {
+            delete this;
+        }
+        else if (m_nRefCount < 0)
+        {
+            CryFatalError("Negative ref count");
+        }
+        return refs;
+    }
+
+protected:
+    virtual ~CRefCountBase() {}
+
+private:
+    int m_nRefCount = 0;
+};
+
+#endif // CRYINCLUDE_EDITOR_UTIL_REFCOUNTBASE_H