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-/*
- * Copyright (c) 2004, Nate Nielsen
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * Redistributions in binary form must reproduce the
- * above copyright notice, this list of conditions and
- * the following disclaimer in the documentation and/or
- * other materials provided with the distribution.
- * * The names of contributors to this software may not be
- * used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
- * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- *
- * CONTRIBUTORS
- * Nate Nielsen <nielsen@memberwebs.com>
- *
- */
-
-#ifndef __REFERENCE_H__
-#define __REFERENCE_H__
-
-/*
- * Reference
- *
- * A basic reference counting pointer
- */
-template<typename C>
-class Reference
-{
-public:
- Reference()
- { m_ptr = NULL; }
-
- Reference(C* ptr)
- {
- m_ptr = ptr;
- addref();
- }
-
- Reference(C* ptr, bool addref)
- {
- m_ptr = ptr;
- if(addref)
- addref();
- }
-
- ~Reference()
- { release(); }
-
- Reference(const Reference& orig)
- {
- m_ptr = orig.m_ptr;
- addref();
- }
-
- Reference& operator=(const C* ptr)
- {
- C* old = m_ptr;
- m_ptr = (C*)ptr;
- addref();
- if(old)
- old->release();
- return *this;
- }
-
- Reference& operator=(const Reference& orig)
- { return operator=(orig.m_ptr); }
-
- void attach(C* ptr)
- {
- release();
- m_ptr = ptr;
- }
-
- C* detach()
- {
- C* ptr = m_ptr;
- m_ptr = NULL;
- return ptr;
- }
-
- operator C*() const
- { return m_ptr; }
-
- C* operator->() const
- { return m_ptr; }
-
-#if 0
- operator bool() const
- {
- return m_ptr != NULL;
- }
-#endif
-
- void release()
- {
- if(m_ptr)
- m_ptr->release();
- m_ptr = NULL;
- }
-
- void addref()
- {
- if(m_ptr)
- m_ptr->addRef();
- }
-
-private:
- C* m_ptr;
-};
-
-/*
- * Instance
- *
- * A basic reference counted object.
- */
-class Instance
-{
-public:
- Instance()
- { m_x = 0; }
- virtual ~Instance()
- { }
- void addRef()
- { m_x++; }
- void release()
- {
- if((--m_x) <= 0)
- delete this;
- }
-
-private:
- // The reference count
- int m_x;
-};
-
-#endif //__REFERENCE_H__