blocxx
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00001 /******************************************************************************* 00002 * Copyright (C) 2005, Vintela, Inc. All rights reserved. 00003 * Copyright (C) 2006, Novell, Inc. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions are met: 00007 * 00008 * * Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * * Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * * Neither the name of 00014 * Vintela, Inc., 00015 * nor Novell, Inc., 00016 * nor the names of its contributors or employees may be used to 00017 * endorse or promote products derived from this software without 00018 * specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00021 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00024 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00025 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00026 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00027 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00028 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00029 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00030 * POSSIBILITY OF SUCH DAMAGE. 00031 *******************************************************************************/ 00032 00033 00038 // 00039 // Copyright (c) 2001, 2002 Peter Dimov 00040 // 00041 // Permission to copy, use, modify, sell and distribute this software 00042 // is granted provided this copyright notice appears in all copies. 00043 // This software is provided "as is" without express or implied 00044 // warranty, and with no claim as to its suitability for any purpose. 00045 // 00046 00047 #ifndef BLOCXX_INTRUSIVE_COUNTABLE_BASE_HPP_INCLUDE_GUARD_ 00048 #define BLOCXX_INTRUSIVE_COUNTABLE_BASE_HPP_INCLUDE_GUARD_ 00049 00050 #include "blocxx/BLOCXX_config.h" 00051 #include "blocxx/RefCount.hpp" 00052 00053 namespace BLOCXX_NAMESPACE 00054 { 00055 00062 class IntrusiveCountableBase; 00063 void IntrusiveReferenceAddRef(IntrusiveCountableBase * p); 00064 void IntrusiveReferenceRelease(IntrusiveCountableBase * p); 00065 00066 class BLOCXX_COMMON_API IntrusiveCountableBase 00067 { 00068 private: 00069 RefCount m_useCount; 00070 00071 protected: 00072 IntrusiveCountableBase() 00073 : m_useCount(0) 00074 { 00075 } 00076 00077 IntrusiveCountableBase(const IntrusiveCountableBase&) 00078 : m_useCount(0) 00079 { 00080 } 00081 00082 IntrusiveCountableBase& operator=(const IntrusiveCountableBase&) 00083 { 00084 // don't change m_useCount 00085 return *this; 00086 } 00087 00088 virtual ~IntrusiveCountableBase(); 00089 00090 public: 00091 inline friend void IntrusiveReferenceAddRef(IntrusiveCountableBase * p) 00092 { 00093 p->m_useCount.inc(); 00094 } 00095 00096 inline friend void IntrusiveReferenceRelease(IntrusiveCountableBase * p) 00097 { 00098 if (p->m_useCount.decAndTest()) 00099 delete p; 00100 } 00101 }; 00102 00103 } // end namespace BLOCXX_NAMESPACE 00104 00105 #endif 00106