vtkSocketCommunicator.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkSocketCommunicator.h
 
  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.
 
=========================================================================*/
#ifndef vtkSocketCommunicator_h
#define vtkSocketCommunicator_h
 
#include "vtkParallelCoreModule.h" // For export macro
#include "vtkCommunicator.h"
 
#include "vtkByteSwap.h" // Needed for vtkSwap macros
 
#ifdef VTK_WORDS_BIGENDIAN
# define vtkSwap4 vtkByteSwap::Swap4LE
# define vtkSwap4Range vtkByteSwap::Swap4LERange
# define vtkSwap8 vtkByteSwap::Swap8LE
# define vtkSwap8Range vtkByteSwap::Swap8LERange
#else
# define vtkSwap4 vtkByteSwap::Swap4BE
# define vtkSwap4Range vtkByteSwap::Swap4BERange
# define vtkSwap8 vtkByteSwap::Swap8BE
# define vtkSwap8Range vtkByteSwap::Swap8BERange
#endif
 
class vtkClientSocket;
class vtkServerSocket;
 
class VTKPARALLELCORE_EXPORT vtkSocketCommunicator : public vtkCommunicator
{
public:
  static vtkSocketCommunicator *New();
  vtkTypeMacro(vtkSocketCommunicator,vtkCommunicator);
  void PrintSelf(ostream& os, vtkIndent indent);
 
 
  virtual int WaitForConnection(int port);
  virtual int WaitForConnection(vtkServerSocket* socket,
    unsigned  long msec = 0);
 
  virtual void CloseConnection();
 
  virtual int ConnectTo(const char* hostName, int port);
 
 
  vtkGetMacro(SwapBytesInReceivedData, int);
 
  int GetIsConnected();
 
  virtual void SetNumberOfProcesses(int num);
 
  //------------------ Communication --------------------
 
 
  virtual int SendVoidArray(const void *data, vtkIdType length, int type,
                            int remoteHandle, int tag);
  virtual int ReceiveVoidArray(void *data, vtkIdType length, int type,
                               int remoteHandle, int tag);
 
  virtual void Barrier();
 
 
  virtual int BroadcastVoidArray(void *data, vtkIdType length, int type,
                                 int srcProcessId);
  virtual int GatherVoidArray(const void *sendBuffer, void *recvBuffer,
                              vtkIdType length, int type, int destProcessId);
  virtual int GatherVVoidArray(const void *sendBuffer, void *recvBuffer,
                               vtkIdType sendLength, vtkIdType *recvLengths,
                               vtkIdType *offsets, int type, int destProcessId);
  virtual int ScatterVoidArray(const void *sendBuffer, void *recvBuffer,
                               vtkIdType length, int type, int srcProcessId);
  virtual int ScatterVVoidArray(const void *sendBuffer, void *recvBuffer,
                                vtkIdType *sendLengths, vtkIdType *offsets,
                                vtkIdType recvLength, int type,
                                int srcProcessId);
  virtual int AllGatherVoidArray(const void *sendBuffer, void *recvBuffer,
                                 vtkIdType length, int type);
  virtual int AllGatherVVoidArray(const void *sendBuffer, void *recvBuffer,
                                  vtkIdType sendLength, vtkIdType *recvLengths,
                                  vtkIdType *offsets, int type);
  virtual int ReduceVoidArray(const void *sendBuffer, void *recvBuffer,
                              vtkIdType length, int type,
                              int operation, int destProcessId);
  virtual int ReduceVoidArray(const void *sendBuffer, void *recvBuffer,
                              vtkIdType length, int type,
                              Operation *operation, int destProcessId);
  virtual int AllReduceVoidArray(const void *sendBuffer, void *recvBuffer,
                                 vtkIdType length, int type,
                                 int operation);
  virtual int AllReduceVoidArray(const void *sendBuffer, void *recvBuffer,
                                 vtkIdType length, int type,
                                 Operation *operation);
 
 
  vtkSetClampMacro(PerformHandshake, int, 0, 1);
  vtkBooleanMacro(PerformHandshake, int);
  vtkGetMacro(PerformHandshake, int);
 
  //BTX
 
  virtual void SetLogStream(ostream* stream);
  virtual ostream* GetLogStream();
  //ETX
 
 
  virtual int LogToFile(const char* name);
  virtual int LogToFile(const char* name, int append);
 
 
  vtkSetMacro(ReportErrors, int);
  vtkGetMacro(ReportErrors, int);
 
 
  vtkGetObjectMacro(Socket, vtkClientSocket);
  void SetSocket(vtkClientSocket*);
 
  int Handshake();
 
  int ServerSideHandshake();
 
  int ClientSideHandshake();
 
 
  vtkGetMacro(IsServer, int);
 
  static int GetVersion();
 
 
  void BufferCurrentMessage()
    { this->BufferMessage = true; }
 
  bool HasBufferredMessages();
 
//BTX
protected:
 
  vtkClientSocket* Socket;
  int SwapBytesInReceivedData;
  int RemoteHas64BitIds;
  int PerformHandshake;
  int IsServer;
 
  int ReportErrors;
 
  ofstream* LogFile;
  ostream* LogStream;
 
  vtkSocketCommunicator();
  ~vtkSocketCommunicator();
 
  // Wrappers around send/recv calls to implement loops.  Return 1 for
  // success, and 0 for failure.
  int SendTagged(const void* data, int wordSize, int numWords, int tag,
                 const char* logName);
  int ReceiveTagged(void* data, int wordSize, int numWords, int tag,
                    const char* logName);
  int ReceivePartialTagged(void* data, int wordSize, int numWords, int tag,
                    const char* logName);
 
  int ReceivedTaggedFromBuffer(
    void* data, int wordSize, int numWords, int tag, const char* logName);
 
  void FixByteOrder(void* data, int wordSize, int numWords);
 
  // Internal utility methods.
  void LogTagged(const char* name, const void* data, int wordSize, int numWords,
                 int tag, const char* logName);
  int CheckForErrorInternal(int id);
  bool BufferMessage;
private:
  vtkSocketCommunicator(const vtkSocketCommunicator&);  // Not implemented.
  void operator=(const vtkSocketCommunicator&);  // Not implemented.
 
  int SelectSocket(int socket, unsigned long msec);
 
  // SwapBytesInReceiveData needs an invalid / not set.
  // This avoids checking length of endian handshake.
  enum ErrorIds {
    SwapOff = 0,
    SwapOn,
    SwapNotSet
  };
 
  // One may be tempted to change this to a vtkIdType, but really an int is
  // enough since we split messages > VTK_INT_MAX.
  int TagMessageLength;
 
  //  Buffer to save messages received with different tag than requested.
  class vtkMessageBuffer;
  vtkMessageBuffer* ReceivedMessageBuffer;
 
//ETX
};
 
#endif