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/*=========================================================================
Program: Visualization Toolkit
Module: PipelineParallelism.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// This example demonstrates how to write a pipeline parallel application
// with VTK. It creates two parts of a pipeline on a two different
// processors and connects them with ports. The two processes can then
// process the data in a pipeline mode, i.e:
// 1. Consumer asks the producer to start producing data,
// 2. Consumer receives data and starts processing it,
// 3. Producer starts producing new data,
// 4. Goto 2 unless done.
// The pipeline used in this example is as follows:
// rtSource -> OutputPort --- InputPort -> contour -> Render
// process 0 process 1
// See pipe1.cxx and pipe2.cxx for the pipelines.
#include "PipelineParallelism.h"
int main( int argc, char* argv[] )
{
// Note that this will create a vtkMPIController if MPI
// is configured, vtkThreadedController otherwise.
vtkMultiProcessController* controller = vtkMultiProcessController::New();
controller->Initialize(&argc, &argv);
// When using MPI, the number of processes is determined
// by the external program which launches this application.
// However, when using threads, we need to set it ourselves.
if (controller->IsA("vtkThreadedController"))
{
// Set the number of processes to 2 for this example.
controller->SetNumberOfProcesses(2);
}
int numProcs = controller->GetNumberOfProcesses();
if (numProcs != 2)
{
cerr << "This example requires two processes." << endl;
controller->Finalize();
controller->Delete();
return 1;
}
// Assign the functions and execute them
controller->SetMultipleMethod(0, pipe1, 0);
controller->SetMultipleMethod(1, pipe2, 0);
controller->MultipleMethodExecute();
// Clean-up and exit
controller->Finalize();
controller->Delete();
return 0;
}
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