MPI_Pack_external_size function

Returns the upper bound on the amount of space needed to pack a message using MPI_Pack_external.

Syntax

int MPIAPI MPI_Pack_external_size(
        _In_z_ char  *datarep,
        int          incount,
        MPI_Datatype datatype,
  _Out_ MPI_Aint     *size
);

Parameters

• datarep
  Data representation.

• incount
  Number of input data items.

• datatype
  Datatype of each input data item.

• size [out]
  Output buffer size, in bytes.

Return value

Returns MPI_SUCCESS on success. Otherwise, the return value is an error code.

In Fortran, the return value is stored in the IERROR parameter.

Fortran

    MPI_PACK_EXTERNAL_SIZE(DATAREP, INCOUNT, DATATYPE, SIZE, IERROR)
        INTEGER INCOUNT, DATATYPE, IERROR
        INTEGER(KIND=MPI_ADDRESS_KIND) SIZE
        CHARACTER*(*) DATAREP

Requirements

Product	HPC Pack 2012 MS-MPI Redistributable Package, HPC Pack 2008 R2 MS-MPI Redistributable Package, HPC Pack 2008 MS-MPI Redistributable Package or HPC Pack 2008 Client Utilities
Header	Mpi.h; Mpif.h
Library	Msmpi.lib
DLL	Msmpi.dll

See also

MPI Datatype Functions