Crazy Eddies GUI System: CEGUIRefCounted.h Source File

Crazy Eddies GUI System 0.7.6

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CEGUIRefCounted.h

    00001 /************************************************************************
    00002     filename:   CEGUIRefCounted.h
    00003     created:    Wed Mar 1 2006
    00004     author:     Paul D Turner <paul@cegui.org.uk>
    00005 *************************************************************************/
    00006 /***************************************************************************
    00007  *   Copyright (C) 2004 - 2006 Paul D Turner & The CEGUI Development Team
    00008  *
    00009  *   Permission is hereby granted, free of charge, to any person obtaining
    00010  *   a copy of this software and associated documentation files (the
    00011  *   "Software"), to deal in the Software without restriction, including
    00012  *   without limitation the rights to use, copy, modify, merge, publish,
    00013  *   distribute, sublicense, and/or sell copies of the Software, and to
    00014  *   permit persons to whom the Software is furnished to do so, subject to
    00015  *   the following conditions:
    00016  *
    00017  *   The above copyright notice and this permission notice shall be
    00018  *   included in all copies or substantial portions of the Software.
    00019  *
    00020  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    00021  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    00022  *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    00023  *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
    00024  *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
    00025  *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
    00026  *   OTHER DEALINGS IN THE SOFTWARE.
    00027  ***************************************************************************/
    00028 #ifndef _CEGUIRefCounted_h_
    00029 #define _CEGUIRefCounted_h_
    00030
    00031 // Start of CEGUI namespace section
    00032 namespace CEGUI
    00033 {
    00039 template<typename T>
    00040 class RefCounted
    00041 {
    00042 public:
    00047     RefCounted() :
    00048         d_object(0),
    00049         d_count(0)
    00050     {
    00051     }
    00052
    00057     RefCounted(T* ob) :
    00058         d_object(ob),
    00059         d_count((ob != 0) ? new unsigned int(1) : 0)
    00060     {
    00061     }
    00062
    00067     RefCounted(const RefCounted<T>& other) :
    00068         d_object(other.d_object),
    00069         d_count(other.d_count)
    00070     {
    00071         if (d_count)
    00072             addRef();
    00073     }
    00074
    00080     ~RefCounted()
    00081     {
    00082         if (d_object)
    00083             release();
    00084     }
    00085
    00092     RefCounted<T>& operator=(const RefCounted<T>& other)
    00093     {
    00094         if (*this != other)
    00095         {
    00096             if (d_object)
    00097                 release();
    00098
    00099             d_object = other.d_object;
    00100             d_count = d_object ? other.d_count : 0;
    00101
    00102             if (d_count)
    00103                 addRef();
    00104         }
    00105
    00106         return *this;
    00107     }
    00108
    00114     bool operator==(const RefCounted<T>& other) const
    00115     {
    00116         return d_object == other.d_object;
    00117     }
    00118
    00124     bool operator!=(const RefCounted<T>& other) const
    00125     {
    00126         return d_object != other.d_object;
    00127     }
    00128
    00134     const T& operator*() const
    00135     {
    00136         return *d_object;
    00137     }
    00138
    00139     T& operator*()
    00140     {
    00141         return *d_object;
    00142     }
    00143
    00148     const T* operator->() const
    00149     {
    00150         return d_object;
    00151     }
    00152
    00153     T* operator->()
    00154     {
    00155         return d_object;
    00156     }
    00157
    00162     bool isValid() const
    00163     {
    00164         return d_object != 0;
    00165     }
    00166
    00167 private:
    00172     void addRef()
    00173     {
    00174         ++*d_count;
    00175     }
    00176
    00182     void release()
    00183     {
    00184         if (!--*d_count)
    00185         {
    00186             delete d_object;
    00187             delete d_count;
    00188             d_object = 0;
    00189             d_count = 0;
    00190         }
    00191     }
    00192
    00193     T* d_object;
    00194     unsigned int* d_count;
    00195 };
    00196
    00197 } // End of  CEGUI namespace section
    00198
    00199 #endif  // end of guard _CEGUIRefCounted_h_