| FDO API Reference | Feature Data Objects |
00001 #ifndef _IDISPOSABLE_H_ 00002 #define _IDISPOSABLE_H_ 00003 // 00004 00005 // 00006 // Copyright (C) 2004-2006 Autodesk, Inc. 00007 // 00008 // This library is free software; you can redistribute it and/or 00009 // modify it under the terms of version 2.1 of the GNU Lesser 00010 // General Public License as published by the Free Software Foundation. 00011 // 00012 // This library is distributed in the hope that it will be useful, 00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 // Lesser General Public License for more details. 00016 // 00017 // You should have received a copy of the GNU Lesser General Public 00018 // License along with this library; if not, write to the Free Software 00019 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00020 // 00021 00022 #ifdef _WIN32 00023 #pragma once 00024 #endif 00025 00026 /// \brief 00027 /// FdoIDisposable is the base interface for all classes that implement this 00028 /// standard interface for reference counting and object destruction. 00029 class FdoIDisposable 00030 { 00031 protected: 00032 /// \brief 00033 /// Create an instance of the IDisposable object 00034 /// 00035 /// \return 00036 /// Returns nothing 00037 /// 00038 FDO_API_COMMON FdoIDisposable() : m_refCount(1) {}; 00039 00040 /// \brief 00041 /// Default destructor for this class. 00042 /// 00043 /// \return 00044 /// Returns nothing 00045 /// 00046 FDO_API_COMMON virtual ~FdoIDisposable() {}; 00047 00048 /// \brief 00049 /// Dispose this object. 00050 /// 00051 /// \return 00052 /// Returns nothing 00053 /// 00054 FDO_API_COMMON virtual void Dispose() = 0; 00055 00056 public: 00057 /// \brief 00058 /// Increase the reference count. 00059 /// 00060 /// \return 00061 /// Returns the new reference count (value for debugging use only). 00062 /// 00063 FDO_API_COMMON FdoInt32 AddRef() { return ++m_refCount; } 00064 00065 /// \brief 00066 /// Decrease the reference count. 00067 /// 00068 /// \return 00069 /// Returns the new reference count (value for debugging use only). 00070 /// 00071 FDO_API_COMMON FdoInt32 Release() { if (0 != --m_refCount ) return m_refCount; Dispose(); return 0; } 00072 00073 /// \brief 00074 /// Retrieves the reference count. 00075 /// 00076 /// \return 00077 /// Returns the existing reference count value. 00078 /// 00079 FDO_API_COMMON FdoInt32 GetRefCount() { return m_refCount; } 00080 00081 private: 00082 FdoInt32 m_refCount; 00083 }; 00084 00085 #define FDO_SAFE_RELEASE(x) {if (x) (x)->Release(); (x) = NULL;} 00086 #define FDO_SAFE_ADDREF(x) ((x != NULL) ? (x)->AddRef(), (x) : (NULL)) 00087 #endif 00088 00089
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