---

Parallel/vtkMultiProcessController.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkMultiProcessController.h,v $
  Language:  C++

  Copyright (c) 1993-2002 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.

=========================================================================*/
#ifndef __vtkMultiProcessController_h
#define __vtkMultiProcessController_h

#include "vtkObject.h"

#include "vtkCommunicator.h" // Needed for direct access to communicator

class vtkDataSet;
class vtkImageData;
class vtkCollection;
class vtkOutputWindow;
class vtkDataObject;
class vtkMultiProcessController;

//BTX
// The type of function that gets called when new processes are initiated.
typedef void (*vtkProcessFunctionType)(vtkMultiProcessController *controller, 
                                       void *userData);

// The type of function that gets called when an RMI is triggered.
typedef void (*vtkRMIFunctionType)(void *localArg, 
                                   void *remoteArg, int remoteArgLength, 
                                   int remoteProcessId);
//ETX


class VTK_PARALLEL_EXPORT vtkMultiProcessController : public vtkObject
{
public:
  static vtkMultiProcessController *New();
  vtkTypeRevisionMacro(vtkMultiProcessController,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  virtual void Initialize(int* vtkNotUsed(argc), char*** vtkNotUsed(argv))=0;


  virtual void Initialize(int* vtkNotUsed(argc), char*** vtkNotUsed(argv),
                          int initializedExternally)=0;

  virtual void Finalize()=0;

  virtual void Finalize(int finalizedExternally)=0;


  virtual void SetNumberOfProcesses(int num);
  vtkGetMacro( NumberOfProcesses, int );

  //BTX
  /*! Set the SingleMethod to f() and the UserData of the for the method to
      be executed by all of the processes when SingleMethodExecute is
      called.  All the processes will start by calling this function. */
  void SetSingleMethod(vtkProcessFunctionType, void *data);
  //ETX

  virtual void SingleMethodExecute() = 0;
  
  //BTX
  /*! Set the MultipleMethod to f() and the UserData of the for the method
      to be executed by the process index when MultipleMethodExecute is
      called.  This is for having each process start with a different
      function and data argument. */
  void SetMultipleMethod(int index, vtkProcessFunctionType, void *data); 
  //ETX

  virtual void MultipleMethodExecute() = 0;

  virtual int GetLocalProcessId() { return this->LocalProcessId; }

  static vtkMultiProcessController *GetGlobalController();

  virtual void CreateOutputWindow() = 0;
  

  vtkSetMacro(ForceDeepCopy, int);
  vtkGetMacro(ForceDeepCopy, int);
  vtkBooleanMacro(ForceDeepCopy, int);

  
  //------------------ RMIs --------------------
  //BTX
  void AddRMI(vtkRMIFunctionType, void *localArg, int tag);
  

  void RemoveRMI(vtkRMIFunctionType f, void *arg, int tag)
    {f = f; arg = arg; tag = tag; vtkErrorMacro("RemoveRMI Not Implemented Yet");};
  //ETX
  
  void TriggerRMI(int remoteProcessId, void *arg, int argLength, int tag);

  void TriggerBreakRMIs();


  void TriggerRMI(int remoteProcessId, char *arg, int tag) 
    { this->TriggerRMI(remoteProcessId, (void*)arg, 
                       static_cast<int>(strlen(arg))+1, tag); }


  void TriggerRMI(int remoteProcessId, int tag)
    { this->TriggerRMI(remoteProcessId, NULL, 0, tag); }

  void ProcessRMIs();


  vtkSetMacro(BreakFlag, int);
  vtkGetMacro(BreakFlag, int);

  vtkGetObjectMacro(Communicator, vtkCommunicator);
  
//BTX

  enum Consts {
    MAX_PROCESSES=8192,
    ANY_SOURCE=-1,
    INVALID_SOURCE=-2,
    RMI_TAG=315167,
    RMI_ARG_TAG=315168,
    BREAK_RMI_TAG=239954
  };

//ETX

  virtual void Barrier() = 0;

  static void SetGlobalController(vtkMultiProcessController *controller);

  //------------------ Communication --------------------
  

  int Send(int* data, int length, int remoteProcessId, int tag);
  int Send(unsigned long* data, int length, int remoteProcessId, 
           int tag);
  int Send(char* data, int length, int remoteProcessId, int tag);
  int Send(unsigned char* data, int length, int remoteProcessId, int tag);
  int Send(float* data, int length, int remoteProcessId, int tag);
  int Send(double* data, int length, int remoteProcessId, int tag);
#ifdef VTK_USE_64BIT_IDS
  int Send(vtkIdType* data, int length, int remoteProcessId, int tag);
#endif
  int Send(vtkDataObject *data, int remoteId, int tag);
  int Send(vtkDataArray *data, int remoteId, int tag);


  int Receive(int* data, int length, int remoteProcessId, int tag);
  int Receive(unsigned long* data, int length, int remoteProcessId, 
              int tag);
  int Receive(char* data, int length, int remoteProcessId, int tag);
  int Receive(unsigned char* data, int length, int remoteProcessId, int tag);
  int Receive(float* data, int length, int remoteProcessId, int tag);
  int Receive(double* data, int length, int remoteProcessId, int tag);
#ifdef VTK_USE_64BIT_IDS
  int Receive(vtkIdType* data, int length, int remoteProcessId, int tag);
#endif
  int Receive(vtkDataObject* data, int remoteId, int tag);
  int Receive(vtkDataArray* data, int remoteId, int tag);

// Internally implemented RMI to break the process loop.

protected:
  vtkMultiProcessController();
  ~vtkMultiProcessController();
  
  int MaximumNumberOfProcesses;
  int NumberOfProcesses;

  int LocalProcessId;
  
  vtkProcessFunctionType      SingleMethod;
  void                       *SingleData;
  vtkProcessFunctionType      MultipleMethod[MAX_PROCESSES];
  void                       *MultipleData[MAX_PROCESSES];  
  
  vtkCollection *RMIs;
  
  // This is a flag that can be used by the ports to break
  // their update loop. (same as ProcessRMIs)
  int BreakFlag;

  void ProcessRMI(int remoteProcessId, void *arg, int argLength, int rmiTag);

  // This method implements "GetGlobalController".  
  // It needs to be virtual and static.
  virtual vtkMultiProcessController *GetLocalController();

  
  // This flag can force deep copies during send.
  int ForceDeepCopy;

  vtkOutputWindow* OutputWindow;

  // Note that since the communicators can be created differently
  // depending on the type of controller, the subclasses are
  // responsible of deleting them.
  vtkCommunicator* Communicator;

  // Communicator which is a copy of the current user
  // level communicator except the context; i.e. even if the tags 
  // are the same, the RMI messages will not interfere with user 
  // level messages. (This only works with MPI. When using threads,
  // the tags have to be unique.)
  // Note that since the communicators can be created differently
  // depending on the type of controller, the subclasses are
  // responsible of deleting them.
  vtkCommunicator* RMICommunicator;

private:
  vtkMultiProcessController(const vtkMultiProcessController&);  // Not implemented.
  void operator=(const vtkMultiProcessController&);  // Not implemented.
};


inline int vtkMultiProcessController::Send(vtkDataObject *data, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(vtkDataArray *data, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(int* data, int length, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(unsigned long* data, 
                                           int length, int remoteThreadId, 
                                           int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(char* data, int length, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(unsigned char* data, int length, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(float* data, int length, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Send(double* data, int length, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

#ifdef VTK_USE_64BIT_IDS
inline int vtkMultiProcessController::Send(vtkIdType* data, int length, 
                                           int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Send(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}
#endif

inline int vtkMultiProcessController::Receive(vtkDataObject* data, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(vtkDataArray* data, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(int* data, int length, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(unsigned long* data, 
                                              int length,int remoteThreadId, 
                                              int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(char* data, int length, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(unsigned char* data, int length, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(float* data, int length, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

inline int vtkMultiProcessController::Receive(double* data, int length, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}

#ifdef VTK_USE_64BIT_IDS
inline int vtkMultiProcessController::Receive(vtkIdType* data, int length, 
                                              int remoteThreadId, int tag)
{
  if (this->Communicator)
    {
    return this->Communicator->Receive(data, length, remoteThreadId, tag);
    }
  else
    {
    return 0;
    }
}
#endif

#endif

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