#include "mpi.h" int MPI_Cart_shift ( comm, direction, displ, source, dest ) MPI_Comm comm; int direction; int displ; int *source; int *dest;
comm | communicator with cartesian structure (handle)
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direction | coordinate dimension of shift (integer)
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disp | displacement (> 0: upwards shift, < 0: downwards shift) (integer)
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rank_source | rank of source process (integer)
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rank_dest | rank of destination process (integer)
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All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGER in Fortran.
All MPI routines (except MPI_Wtime and MPI_Wtick) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Errhandler_set; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error.
Location:cart_shift.c