git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@26 f3b2605a-c512-4ea7-a41b-209d697bcdaa
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sjplimp
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src/STUBS/mpi.cpp
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294
src/STUBS/mpi.cpp
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/* -----------------------------------------------------------------------
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LAMMPS 2003 (July 31) - Molecular Dynamics Simulator
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Sandia National Laboratories, www.cs.sandia.gov/~sjplimp/lammps.html
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Steve Plimpton, sjplimp@sandia.gov
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Copyright (2003) Sandia Corporation. Under the terms of Contract
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DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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certain rights in this software. This software is distributed under
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the GNU General Public License.
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See the README file in the top-level LAMMPS directory.
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------------------------------------------------------------------------ */
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/* Single-processor "stub" versions of MPI routines */
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#include "stdlib.h"
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#include "stdio.h"
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#include <sys/time.h>
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#include "mpi.h"
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/* lo-level function prototypes */
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void mpi_copy_int(void *, void *, int);
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void mpi_copy_float(void *, void *, int);
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void mpi_copy_double(void *, void *, int);
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void mpi_copy_char(void *, void *, int);
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void mpi_copy_byte(void *, void *, int);
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/* MPI Functions */
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void MPI_Init(int *argc, char ***argv) {}
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void MPI_Comm_rank(MPI_Comm comm, int *me)
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{
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*me = 0;
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}
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void MPI_Comm_size(MPI_Comm comm, int *nprocs)
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{
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*nprocs = 1;
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}
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void MPI_Abort(MPI_Comm comm, int errorcode)
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{
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exit(1);
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}
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void MPI_Finalize() {}
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double MPI_Wtime()
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{
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double time;
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struct timeval tv;
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gettimeofday(&tv,NULL);
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time = 1.0 * tv.tv_sec + 1.0e-6 * tv.tv_usec;
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return time;
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}
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void MPI_Send(void *buf, int count, MPI_Datatype datatype,
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int dest, int tag, MPI_Comm comm)
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{
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printf("MPI Stub WARNING: Should not send message to self\n");
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}
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void MPI_Rsend(void *buf, int count, MPI_Datatype datatype,
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int dest, int tag, MPI_Comm comm)
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{
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printf("MPI Stub WARNING: Should not rsend message to self\n");
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}
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void MPI_Recv(void *buf, int count, MPI_Datatype datatype,
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int source, int tag, MPI_Comm comm, MPI_Status *status)
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{
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printf("MPI Stub WARNING: Should not recv message from self\n");
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}
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void MPI_Irecv(void *buf, int count, MPI_Datatype datatype,
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int source, int tag, MPI_Comm comm, MPI_Request *request)
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{
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printf("MPI Stub WARNING: Should not recv message from self\n");
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}
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void MPI_Wait(MPI_Request *request, MPI_Status *status)
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{
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printf("MPI Stub WARNING: Should not wait on message from self\n");
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}
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void MPI_Waitany(int count, MPI_Request *request, int *index,
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MPI_Status *status)
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{
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printf("MPI Stub WARNING: Should not wait on message from self\n");
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}
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void MPI_Sendrecv(void *sbuf, int scount, MPI_Datatype sdatatype,
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int dest, int stag, void *rbuf, int rcount,
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MPI_Datatype rdatatype, int source, int rtag,
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MPI_Comm comm, MPI_Status *status)
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{
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printf("MPI Stub WARNING: Should not send message to self\n");
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}
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void MPI_Get_count(MPI_Status *status, MPI_Datatype datatype, int *count)
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{
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printf("MPI Stub WARNING: Should not get count of message to self\n");
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}
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void MPI_Comm_split(MPI_Comm comm, int color, int key, MPI_Comm *comm_out)
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{
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*comm_out = comm;
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}
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void MPI_Comm_dup(MPI_Comm comm, MPI_Comm *comm_out)
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{
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*comm_out = comm;
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}
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void MPI_Comm_free(MPI_Comm *comm) { }
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void MPI_Cart_create(MPI_Comm comm_old, int ndims, int *dims, int *periods,
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int reorder, MPI_Comm *comm_cart)
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{
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*comm_cart = comm_old;
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}
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void MPI_Cart_get(MPI_Comm comm, int maxdims, int *dims, int *periods,
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int *coords)
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{
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dims[0] = dims[1] = dims[2] = 1;
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periods[0] = periods[1] = periods[2] = 1;
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coords[0] = coords[1] = coords[2] = 0;
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}
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void MPI_Cart_shift(MPI_Comm comm, int direction, int displ,
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int *source, int *dest)
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{
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*source = *dest = 0;
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}
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void MPI_Barrier(MPI_Comm comm) {}
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void MPI_Bcast(void *buf, int count, MPI_Datatype datatype,
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int root, MPI_Comm comm) {}
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/* copy values from data1 to data2 */
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void MPI_Allreduce(void *sendbuf, void *recvbuf, int count,
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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if (datatype == MPI_INT)
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mpi_copy_int(sendbuf,recvbuf,count);
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else if (datatype == MPI_FLOAT)
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mpi_copy_float(sendbuf,recvbuf,count);
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else if (datatype == MPI_DOUBLE)
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mpi_copy_double(sendbuf,recvbuf,count);
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else if (datatype == MPI_CHAR)
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mpi_copy_char(sendbuf,recvbuf,count);
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else if (datatype == MPI_BYTE)
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mpi_copy_byte(sendbuf,recvbuf,count);
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}
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void MPI_Scan(void *sendbuf, void *recvbuf, int count,
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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if (datatype == MPI_INT)
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mpi_copy_int(sendbuf,recvbuf,count);
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else if (datatype == MPI_FLOAT)
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mpi_copy_float(sendbuf,recvbuf,count);
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else if (datatype == MPI_DOUBLE)
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mpi_copy_double(sendbuf,recvbuf,count);
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else if (datatype == MPI_CHAR)
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mpi_copy_char(sendbuf,recvbuf,count);
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else if (datatype == MPI_BYTE)
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mpi_copy_byte(sendbuf,recvbuf,count);
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}
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/* copy values from data1 to data2 */
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void MPI_Allgather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
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void *recvbuf, int recvcount, MPI_Datatype recvtype,
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MPI_Comm comm)
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{
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if (sendtype == MPI_INT)
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mpi_copy_int(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_FLOAT)
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mpi_copy_float(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_DOUBLE)
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mpi_copy_double(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_CHAR)
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mpi_copy_char(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_BYTE)
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mpi_copy_byte(sendbuf,recvbuf,sendcount);
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}
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/* copy values from data1 to data2 */
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void MPI_Allgatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
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void *recvbuf, int *recvcounts, int *displs,
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MPI_Datatype recvtype, MPI_Comm comm)
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{
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if (sendtype == MPI_INT)
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mpi_copy_int(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_FLOAT)
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mpi_copy_float(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_DOUBLE)
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mpi_copy_double(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_CHAR)
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mpi_copy_char(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_BYTE)
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mpi_copy_byte(sendbuf,recvbuf,sendcount);
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}
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/* copy values from data1 to data2 */
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void MPI_Reduce_scatter(void *sendbuf, void *recvbuf, int *recvcounts,
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MPI_Datatype datatype, MPI_Op op, MPI_Comm comm)
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{
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if (datatype == MPI_INT)
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mpi_copy_int(sendbuf,recvbuf,*recvcounts);
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else if (datatype == MPI_FLOAT)
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mpi_copy_float(sendbuf,recvbuf,*recvcounts);
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else if (datatype == MPI_DOUBLE)
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mpi_copy_double(sendbuf,recvbuf,*recvcounts);
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else if (datatype == MPI_CHAR)
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mpi_copy_char(sendbuf,recvbuf,*recvcounts);
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else if (datatype == MPI_BYTE)
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mpi_copy_byte(sendbuf,recvbuf,*recvcounts);
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}
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/* copy values from data1 to data2 */
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void MPI_Gather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
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void *recvbuf, int recvcount, MPI_Datatype recvtype,
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int root, MPI_Comm comm)
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{
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if (sendtype == MPI_INT)
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mpi_copy_int(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_FLOAT)
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mpi_copy_float(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_DOUBLE)
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mpi_copy_double(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_CHAR)
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mpi_copy_char(sendbuf,recvbuf,sendcount);
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else if (sendtype == MPI_BYTE)
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mpi_copy_byte(sendbuf,recvbuf,sendcount);
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}
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/* ------------------------------------------------------------------------ */
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/* Added routines for data copying */
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void mpi_copy_int(void *data1, void *data2, int n)
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{
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int i;
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int *pdata1 = (int *) data1;
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int *pdata2 = (int *) data2;
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for (i = 0; i < n; i++) pdata2[i] = pdata1[i];
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}
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void mpi_copy_float(void *data1, void *data2, int n)
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{
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int i;
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float *pdata1 = (float *) data1;
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float *pdata2 = (float *) data2;
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for (i = 0; i < n; i++) pdata2[i] = pdata1[i];
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}
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void mpi_copy_double(void *data1, void *data2, int n)
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{
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int i;
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double *pdata1 = (double *) data1;
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double *pdata2 = (double *) data2;
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for (i = 0; i < n; i++) pdata2[i] = pdata1[i];
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}
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void mpi_copy_char(void *data1, void *data2, int n)
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{
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int i;
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char *pdata1 = (char *) data1;
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char *pdata2 = (char *) data2;
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for (i = 0; i < n; i++) pdata2[i] = pdata1[i];
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}
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void mpi_copy_byte(void *data1, void *data2, int n)
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{
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int i;
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char *pdata1 = (char *) data1;
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char *pdata2 = (char *) data2;
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for (i = 0; i < n; i++) pdata2[i] = pdata1[i];
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}
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