CrystalSpace

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csgfx/shadervarblockalloc.h

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00001 /*
00002     Copyright (C) 2005 by Jorrit Tyberghein
00003               (C) 2005 by Frank Richter
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_CSGFX_SHADERVARBLOCKALLOC_H__
00021 #define __CS_CSGFX_SHADERVARBLOCKALLOC_H__
00022 
00023 #include "csextern.h"
00024 
00025 #include "csutil/blockallocator.h"
00026 #include "csutil/ref.h"
00027 #include "csgfx/shadervar.h"
00028 
00038 template<class ObjectDispose = csBlockAllocatorDisposeDelete<csShaderVariable> >
00039 class csShaderVarBlockAlloc
00040 {
00041   struct BlockAllocatedSV : public csShaderVariable
00042   {
00043     csShaderVarBlockAlloc* allocator;
00044     virtual void Delete() { allocator->blockAlloc.Free (this); }
00045   };
00046   friend struct BlockAllocatedSV;
00047   csBlockAllocator<BlockAllocatedSV,
00048     CS::Memory::AllocatorMalloc,
00049     ObjectDispose> blockAlloc;
00050 public:
00056   csShaderVarBlockAlloc (size_t nelem = 32) :
00057     blockAlloc(nelem) {}
00064   csRef<csShaderVariable> Alloc ()
00065   { 
00066     BlockAllocatedSV* sv = blockAlloc.Alloc ();
00067     sv->allocator = this;
00068     return csPtr<csShaderVariable> (sv); 
00069   }
00070 };
00071 
00072 #endif // __CS_CSGFX_SHADERVARBLOCKALLOC_H__

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