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NAME

MPI_Type_hvector - Construct a new type using a vector of contiguous blocks of another type with strides in bytes

SYNOPSIS

#include <mpi.h> int MPI_Type_hvector(int count , int b_len , MPI_Aint stride , MPI_Datatype oldtype , MPI_Datatype *newtype );

#include <pmpi.h> int PMPI_Type_hvector(int count , int b_len , MPI_Aint stride , MPI_Datatype oldtype , MPI_Datatype *newtype );

INCLUDE 'mpif.h' MPI_TYPE_HVECTOR(count , b_len , stride , oldtype , newtype , ierr ) INTEGER count , b_len , stride , oldytpe , newtype , ierr

INPUT PARAMETERS

count - number of vector elements (integer)

b_len - block length of each vector element (integer)

stride - offset between the start of each vector element in bytes (integer)

oldtype - component type (handle)

OUTPUT PARAMETER

newtype - newly constructed type (handle)

DESCRIPTION

The MPI_Type_hvector() function is used to create a new type that describes count series of blocks of b_len contiguous copies of the type oldtype separated by stride - b_len * oldtype.extent bytes apart. In other words, the start of each block is stride bytes apart.

Note that MPI_Type_hvector() uses 32-bit strides in FORTRAN. Due to this, this function is deprecated by the MPI committee. Instead, use the MPI_Type_create_hvector() function, which accepts full 64-bit strides.

The type newtype created by this function should be commited with MPI_Type_commit() if it is to be used with message passing functions. The type should be eventually freed with the MPI_Type_free() function.

PMPI_Type_hvector() is the profiling version of this function.

ERRORS

All MPI routines except for MPI_Wtime and MPI_Wtick return an error value. The the current MPI error handler is invoked if this return value is not MPI_SUCCESS. The default error handler aborts, but this may be changed with by using the MPI_Errhandler_set() function. The predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned instead. Note that MPI does not guarentee that an MPI program can continue past an error. In this implementation, all errors except MPI_ERR_INTERN or MPI_ERR_OTHER should always be recoverable.

MPI_SUCCESS - No error;

MPI_ERR_COUNT - Invalid count;

MPI_ERR_ARG - Invalid pointer;

MPI_ERR_TYPE - Invalid type;

MPI_ERR_INTERN - Out of Memory.

SEE ALSO

MPI_Type_free (3) MPI_Type_struct (3) MPI_Type_create_struct (3) MPI_Type_contiguous (3) MPI_Type_indexed (3) MPI_Type_hindexed (3) MPI_Type_create_hindexed (3) MPI_Type_hvector (3) MPI_Type_create_hvector (3)

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