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csgfx/shadervarblockalloc.h

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/*
    Copyright (C) 2005 by Jorrit Tyberghein
              (C) 2005 by Frank Richter

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef __CS_CSGFX_SHADERVARBLOCKALLOC_H__
#define __CS_CSGFX_SHADERVARBLOCKALLOC_H__

#include "csextern.h"

#include "csutil/blockallocator.h"
#include "csutil/ref.h"
#include "csgfx/shadervar.h"

template<class ObjectDispose = csBlockAllocatorDisposeDelete<csShaderVariable> >
class csShaderVarBlockAlloc
{
  struct BlockAllocatedSV : public csShaderVariable
  {
    csShaderVarBlockAlloc* allocator;
    virtual void Delete() { allocator->blockAlloc.Free (this); }
  };
  friend struct BlockAllocatedSV;
  csBlockAllocator<BlockAllocatedSV,
    CS::Memory::AllocatorMalloc,
    ObjectDispose> blockAlloc;
public:
  csShaderVarBlockAlloc (size_t nelem = 32) :
    blockAlloc(nelem) {}
  csRef<csShaderVariable> Alloc ()
  { 
    BlockAllocatedSV* sv = blockAlloc.Alloc ();
    sv->allocator = this;
    return csPtr<csShaderVariable> (sv); 
  }
};

#endif // __CS_CSGFX_SHADERVARBLOCKALLOC_H__

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