mpi_file_iread_at.3

mpi并行计算的c++代码 可用vc或gcc编译通过 可以用来搭建并行计算试验环境

.TH MPI_File_iread_at 3 "8/31/1998" " " "MPI-2"
.SH NAME
MPI_File_iread_at \-  Nonblocking read using explict offset 
.SH SYNOPSIS
.nf
#include "mpi.h"
int MPI_File_iread_at(MPI_File fh, MPI_Offset offset, void *buf,
                      int count, MPI_Datatype datatype, 
                      MPIO_Request *request)
.fi
.SH INPUT PARAMETERS
.PD 0
.TP
.B fh 
- file handle (handle)
.PD 1
.PD 0
.TP
.B offset 
- file offset (nonnegative integer)
.PD 1
.PD 0
.TP
.B count 
- number of elements in buffer (nonnegative integer)
.PD 1
.PD 0
.TP
.B datatype 
- datatype of each buffer element (handle)
.PD 1

.SH OUTPUT PARAMETERS
.PD 0
.TP
.B buf 
- initial address of buffer (choice)
.PD 1
.PD 0
.TP
.B request 
- request object (handle)
.PD 1

.SH NOTES FOR FORTRAN
All MPI routines in Fortran (except for 'MPI_WTIME' and 'MPI_WTICK')
have an additional argument 'ierr' at the end of the argument list.
'ierr' is an integer and has the same meaning as the return value of
the routine in C.  In Fortran, MPI routines are subroutines and are
invoked with the 'call' statement.

All MPI objects (e.g., 'MPI_Datatype', 'MPI_Comm', 'MPI_File') are of
type 'INTEGER' in Fortran.