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# csutil/dirtyaccessarray.h

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    00001 /*
    00002     Crystal Space utility library: vector class interface
    00003     Copyright (C) 1998,1999,2000 by Andrew Zabolotny <bit@eltech.ru>
    00004
    00005     This library is free software; you can redistribute it and/or
    00006     modify it under the terms of the GNU Library General Public
    00007     License as published by the Free Software Foundation; either
    00008     version 2 of the License, or (at your option) any later version.
    00009
    00010     This library is distributed in the hope that it will be useful,
    00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00013     Library General Public License for more details.
    00014
    00015     You should have received a copy of the GNU Library General Public
    00016     License along with this library; if not, write to the Free
    00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00018 */
    00019
    00020 #ifndef __CS_DIRTYACCESSARRAY_H__
    00021 #define __CS_DIRTYACCESSARRAY_H__
    00022
    00028 //-----------------------------------------------------------------------------
    00029 // Note *1*: The explicit "this->" is needed by modern compilers (such as gcc
    00030 // 3.4.x) which distinguish between dependent and non-dependent names in
    00031 // templates.  See: http://gcc.gnu.org/onlinedocs/gcc/Name-lookup.html
    00032 //-----------------------------------------------------------------------------
    00033
    00034 #include "array.h"
    00035
    00045 template <class T>
    00046 class csDirtyAccessArray : public csArray<T>
    00047 {
    00048 private:
    00049   int RefCount;
    00050
    00051 public:
    00056   csDirtyAccessArray (int ilimit = 0, int ithreshold = 0)
    00057         : csArray<T> (ilimit, ithreshold)
    00058   {
    00059     RefCount = 0;
    00060   }
    00061
    00062   // Reference counting.
    00063   void IncRef () { RefCount++; }
    00064
    00065   // Reference counting. Delete array when reference reaches 0.
    00066   void DecRef ()
    00067   {
    00068     if (RefCount == 1) { this->DeleteAll (); } // see *1*
    00069     RefCount--;
    00070   }
    00071
    00073   T* GetArray ()
    00074   {
    00075     if (this->Length () > 0) // see *1*
    00076       return &this->Get (0);
    00077     else
    00078       return 0;
    00079   }
    00080
    00082   const T* GetArray () const
    00083   {
    00084     if (this->Length () > 0) // see *1*
    00085       return &this->Get (0);
    00086     else
    00087       return 0;
    00088   }
    00089
    00095   T* GetArrayCopy ()
    00096   {
    00097     if (this->Length () > 0) // see *1*
    00098     {
    00099       T* copy = new T [this->Length ()];
    00100       memcpy (copy, &this->Get (0), sizeof (T) * this->Length ());
    00101       return copy;
    00102     }
    00103     else
    00104       return 0;
    00105   }
    00106 };
    00107
    00108 #endif // __CS_DIRTYACCESSARRAY_H__