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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
// This test covers the vtkProcess abstract class.
#include <vtk_mpi.h>
#include "vtkMPIController.h"
#include "vtkObjectFactory.h"
#include "vtkProcess.h"
namespace
{
class MyProcess : public vtkProcess
{
public:
static MyProcess* New();
vtkTypeMacro(MyProcess, vtkProcess);
void Execute() override;
void SetArgs(int anArgc, char* anArgv[]);
protected:
MyProcess();
int Argc;
char** Argv;
};
vtkStandardNewMacro(MyProcess);
MyProcess::MyProcess()
{
this->Argc = 0;
this->Argv = nullptr;
}
void MyProcess::SetArgs(int anArgc, char* anArgv[])
{
this->Argc = anArgc;
this->Argv = anArgv;
}
void MyProcess::Execute()
{
// multiprocess logic
int numProcs = this->Controller->GetNumberOfProcesses();
int me = this->Controller->GetLocalProcessId();
cout << "numProcs=" << numProcs << " me=" << me << endl;
cout << "executable=" << this->Argv[0] << endl;
cout << "argc=" << this->Argc << endl;
const int MY_RETURN_VALUE_MESSAGE = 0x11;
if (me == 0)
{
// root node
this->ReturnValue = 0;
int i = 1;
while (i < numProcs)
{
this->Controller->Send(&this->ReturnValue, 1, i, MY_RETURN_VALUE_MESSAGE);
++i;
}
}
else
{
// satellites
this->Controller->Receive(&this->ReturnValue, 1, 0, MY_RETURN_VALUE_MESSAGE);
}
}
}
int TestProcess(int argc, char* argv[])
{
// This is here to avoid false leak messages from vtkDebugLeaks when
// using mpich. It appears that the root process which spawns all the
// main processes waits in MPI_Init() and calls exit() when
// the others are done, causing apparent memory leaks for any objects
// created before MPI_Init().
MPI_Init(&argc, &argv);
// Note that this will create a vtkMPIController if MPI
// is configured, vtkThreadedController otherwise.
vtkMPIController* c = vtkMPIController::New();
c->Initialize(&argc, &argv, 1);
int retVal = 1;
vtkMultiProcessController::SetGlobalController(c);
int numProcs = c->GetNumberOfProcesses();
int me = c->GetLocalProcessId();
if (numProcs != 2)
{
if (me == 0)
{
cout << "DistributedData test requires 2 processes" << endl;
}
c->Delete();
return retVal;
}
if (!c->IsA("vtkMPIController"))
{
if (me == 0)
{
cout << "TestProcess test requires MPI" << endl;
}
c->Delete();
return retVal;
}
MyProcess* p = MyProcess::New();
p->SetArgs(argc, argv);
c->SetSingleProcessObject(p);
c->SingleMethodExecute();
retVal = p->GetReturnValue();
p->Delete();
c->Finalize();
c->Delete();
return retVal;
}
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