MPI_File_iread_at(3)MPI_File_iread_at(3)NAMEMPI_File_iread_at - Performs a nonblocking read using an explict offset
SYNOPSIS
C:
#include "mpi.h"
int MPI_File_iread_at(MPI_File fh, MPI_Offset offset,
void *buf, int count, MPI_Datatype datatype,
MPI_Request *request)
Fortran:
INCLUDE "mpif.h" (or USE MPI)
<type> BUF(*)
INTEGER fh, count, datatype, request, ierror
INTEGER(KIND=MPI_OFSET_KIND) offset
CALL MPI_FILE_IREAD_AT(fh, offset, buf, count,
datatype, request, ierror)
DESCRIPTIONMPI_File_iread_at is a nonblocking version of the MPI_File_read_at
interface.
MPI_File_iread_at accepts the following arguments:
fh Specifies the file handle (handle)
offset Specifies the file offset (nonnegative integer)
count Specifies the number of elements in the buffer (nonnegative
integer)
datatype Specifies the datatype of each buffer element (handle)
buf Returns the initial address of the buffer (choice)
request Returns the request object (handle)
ierror Specifies the return code value for successful completion,
which is in MPI_SUCCESS. MPI_SUCCESS is defined in the mpif.h
file.
Notes for Fortran
All MPI objects (for example, MPI_Datatype, MPI_Comm, MPI_File) are of
type INTEGER.
Page 1
MPI_File_iread_at(3)MPI_File_iread_at(3)SEE ALSOMPI_File_open(3), MPI_File_read_at(3), MPI_IO(3)
Page 2