/usr/include/vtk-5.8/VPIC/GridExchange.h is in libvtk5-dev 5.8.0-5.
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Copyright (c) 2007, Los Alamos National Security, LLC
All rights reserved.
Copyright 2007. Los Alamos National Security, LLC.
This software was produced under U.S. Government contract DE-AC52-06NA25396
for Los Alamos National Laboratory (LANL), which is operated by
Los Alamos National Security, LLC for the U.S. Department of Energy.
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// .NAME GridExchange - Send my data portions of grid on one processor to
// become ghost portion of grid on a neighbor
//
// .SECTION Description
// GridExchange will take a pointer to contiguous memory, the size of
// memory in each dimension, and the amount of ghost grid information
// to be shared on the front and back of every dimension. From this
// GridExchange can calculate what part of the contiguous memory must be
// packed to share with each of the neighbors, and what part of its own
// memory must be used to unpack similar information from each neighbor.
//
// This can be accomplished by recording for every neighbor the send
// origin and send size, the receive origin and receive size.
//
#ifndef GridExchange_h
#define GridExchange_h
#include "VPICDefinition.h"
using namespace std;
class VPIC_EXPORT GridExchange {
public:
GridExchange(
int rank, // Rank of this processor
int total, // Total processors (needed to find neighbors)
int* decomp, // Decomposition of processor in problem
int* size, // Size of total space to exchange
int ghost0, // Ghost cell count on the front plane
int ghost1); // Ghost cell count on the back plane
// ParaView wants overlap of 1 cell always
// so with a ghost in each direction overlap
// becomes 3 so ghost overlap on front plane
// will be 1 and on the back plane will be 2
~GridExchange();
// Calculate the offsets and sizes for send and receive to neighbors
void initialize();
// Set the processor neighbors of this processor
void setNeighbors();
void setSendOrigin(int neighbor, int x, int y, int z);
void setRecvOrigin(int neighbor, int x, int y, int z);
void setSendSize(int neighbor, int x, int y, int z);
void setRecvSize(int neighbor, int x, int y, int z);
// Exchange sections of a grid with all neighbors
void exchangeGrid(GRID_T* data);
void exchange(
int sendTo, // Neighbor to send particles to
int recvFrom, // Neighbor to receive particles from
GRID_T* data); // Grid to share
private:
int myProc; // My processor number
int numProc; // Total number of processors
int layoutSize[DIMENSION]; // Decomposition of processors
int layoutPos[DIMENSION]; // Position of this processor in decomposition
int*** layoutID; // Layout of all processors
int bufferSize; // Max message size to send/receive
GRID_T* sendBuffer; // Message buffer
GRID_T* recvBuffer; // Message buffer
int totalSize[DIMENSION]; // Sizes with mine and ghost grids
int mine[DIMENSION]; // Sizes of only my grid
int ghost0; // Ghost grid size on front planes
int ghost1; // Ghost grid size on back planes
// Processor id for each neighbor
int neighbor[NUM_OF_NEIGHBORS];
// Region of data to send to each neighbor
int sendOrigin[NUM_OF_NEIGHBORS][DIMENSION];
int sendSize[NUM_OF_NEIGHBORS][DIMENSION];
// Region of data to receive from each neighbor
int recvOrigin[NUM_OF_NEIGHBORS][DIMENSION];
int recvSize[NUM_OF_NEIGHBORS][DIMENSION];
};
#endif
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