MPI_Unpack_external function - Message Passing Interface (original) (raw)

Unpack a buffer (packed with MPI_Pack_external) according to a datatype into contiguous memory.

Syntax

int MPIAPI MPI_Unpack_external(
        _In_z_ char                 *datarep,
        _In_bytecount_(insize) void *inbuf,
        MPI_Aint                    insize,
        _Inout_ MPI_Aint            *position,
  _Out_ void                        *outbuf,
        int                         outcount,
        MPI_Datatype                datatype
);

Parameters

• datarep
  Data representation.
• inbuf
  Start address of the input buffer.
• insize
  Input buffer size, in bytes.
• position
  Current position in buffer, in bytes.
• outbuf [out]
  Start address of the output buffer.
• outcount
  Number of output data items.
• datatype
  Datatype of output data item.

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_UNPACK_EXTERNAL(DATAREP, INBUF, INSIZE, POSITION, OUTBUF, OUTCOUNT,
                DATATYPE, IERROR)
        INTEGER OUTCOUNT, DATATYPE, IERROR
        INTEGER(KIND=MPI_ADDRESS_KIND) INSIZE, POSITION
        CHARACTER*(*) DATAREP
        <type> INBUF(*), OUTBUF(*)

Requirements

See also

MPI Datatype Functions