MPI_File_iread_at function

Nonblocking read using explicit offset.

Syntax

int MPIAPI MPI_File_iread_at(
        MPI_File     file,
        MPI_Offset   offset,
  _Out_ void         *buf,
        int          count,
        MPI_Datatype datatype,
  _Out_ MPI_Request  *request
);

Parameters

• file
  File handle.

• offset
  File offset.

• buf [out]
  Initial address of buffer.

• count
  Number of elements in buffer.

• datatype
  Datatype of each buffer element.

• request [out]
  Request object.

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_FILE_IREAD_AT(FH, OFFSET, BUF, COUNT, DATATYPE, REQUEST, IERROR)
        <type> BUF(*)
        INTEGER FH, COUNT, DATATYPE, REQUEST, IERROR
        INTEGER(KIND=MPI_OFFSET_KIND) OFFSET

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 File Functions