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contrib/vtkAsynchronousBuffer.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkAsynchronousBuffer.h,v $
00005   Language:  C++
00006 
00007 
00008 Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
00009 All rights reserved.
00010 
00011 Redistribution and use in source and binary forms, with or without
00012 modification, are permitted provided that the following conditions are met:
00013 
00014  * Redistributions of source code must retain the above copyright notice,
00015    this list of conditions and the following disclaimer.
00016 
00017  * Redistributions in binary form must reproduce the above copyright notice,
00018    this list of conditions and the following disclaimer in the documentation
00019    and/or other materials provided with the distribution.
00020 
00021  * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
00022    of any contributors may be used to endorse or promote products derived
00023    from this software without specific prior written permission.
00024 
00025  * Modified source versions must be plainly marked as such, and must not be
00026    misrepresented as being the original software.
00027 
00028 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00029 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00030 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00031 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
00032 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00033 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00034 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00035 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00036 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00037 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00038 
00039 =========================================================================*/
00061 #ifndef __vtkAsynchronousBuffer_h
00062 #define __vtkAsynchronousBuffer_h
00063 
00064 #include "vtkDataSetToDataSetFilter.h"
00065 #include "vtkMultiThreader.h"
00066 class vtkPortController;
00067 
00068 
00069 
00070 class VTK_EXPORT vtkAsynchronousBuffer : public vtkDataSetToDataSetFilter
00071 {
00072 public:
00073   vtkTypeMacro(vtkAsynchronousBuffer,vtkDataSetToDataSetFilter);
00074   void PrintSelf(ostream& os, vtkIndent indent);
00075   static vtkAsynchronousBuffer *New();
00076 
00083   vtkSetMacro(Blocking, int);
00084   vtkGetMacro(Blocking, int);
00085   vtkBooleanMacro(Blocking, int);
00086 
00088   void InternalUpdate(vtkDataObject *output);
00089 
00091   void BlockingUpdate();
00092   void NonblockingUpdate();
00093   void PromoteData();
00094   int TestForFinished();
00095   void WaitForFinished();
00096 
00101   void UpdateInformation(); 
00102   
00105   vtkGetMacro(Finished, unsigned char); 
00106   
00107   // This ivar is public so thread function. can have access.
00108   // I do not think we need a lock on this variable.
00109   unsigned char Finished;
00110   unsigned char OutputConsumed;
00111   
00112 protected:
00113   vtkAsynchronousBuffer();
00114   ~vtkAsynchronousBuffer();
00115   vtkAsynchronousBuffer(const vtkAsynchronousBuffer&) {};
00116   void operator=(const vtkAsynchronousBuffer&) {};
00117 
00118   int Blocking;
00119   vtkMultiThreader *Threader;
00120   int ThreadId;
00121 
00122   void BlockingUpdateInformation();
00123   void NonblockingUpdateInformation();
00124   void Execute();
00125 };
00126 
00127 #endif
00128 
00129 

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