9175da1e02
versions, dates and build names. Fixes trac:1387 Big thanks to Jeff and Brian for help and oversight. This commit was SVN r19120. The following Trac tickets were found above: Ticket 1387 --> https://svn.open-mpi.org/trac/ompi/ticket/1387
82 строки
2.6 KiB
Plaintext
82 строки
2.6 KiB
Plaintext
.\"Copyright 2006-2008 Sun Microsystems, Inc.
|
|
.\" Copyright (c) 1996 Thinking Machines Corporation
|
|
.TH MPI_File_read 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
|
|
.SH NAME
|
|
\fBMPI_File_read\fP \- Reads a file starting at the location specified by the individual file pointer (blocking, noncollective).
|
|
|
|
.SH SYNTAX
|
|
.ft R
|
|
.nf
|
|
C Syntax
|
|
#include <mpi.h>
|
|
int MPI_File_read(MPI_File \fIfh\fP, void \fI*buf\fP,
|
|
int \fIcount\fP, MPI_Datatype \fIdatatype\fP, MPI_Status \fI*status\fP)
|
|
|
|
Fortran Syntax
|
|
INCLUDE 'mpif.h'
|
|
MPI_FILE_READ(\fI FH\fP, \fI BUF\fP, \fICOUNT\fP,
|
|
\fI DATATYPE\fP, \fISTATUS\fP, \fIIERROR\fP)
|
|
<type> BUF(*)
|
|
INTEGER FH, COUNT, DATATYPE, STATUS(MPI_STATUS_SIZE),
|
|
IERROR
|
|
|
|
.SH C++ Syntax
|
|
.nf
|
|
#include <mpi.h>
|
|
void MPI::File::Read(void* \fIbuf\fP, int \fIcount\fP,
|
|
const MPI::Datatype& \fIdatatype\fP, MPI::Status& \fIstatus\fP)
|
|
|
|
void MPI::File::Read(void* \fIbuf\fP, int \fIcount\fP,
|
|
const MPI::Datatype& \fIdatatype\fP)
|
|
|
|
.SH INPUT PARAMETERS
|
|
.ft R
|
|
.TP 1i
|
|
fh
|
|
File handle (handle).
|
|
.TP 1i
|
|
count
|
|
Number of elements in buffer (integer).
|
|
.TP 1i
|
|
datatype
|
|
Data type of each buffer element (handle).
|
|
|
|
.SH OUTPUT PARAMETERS
|
|
.ft R
|
|
.TP 1i
|
|
buf
|
|
Initial address of buffer (integer).
|
|
.TP 1i
|
|
status
|
|
Status object (status).
|
|
.TP 1i
|
|
IERROR
|
|
Fortran only: Error status (integer).
|
|
|
|
.SH DESCRIPTION
|
|
.ft R
|
|
MPI_File_read attempts to read from the file associated with
|
|
.I fh
|
|
(at the current individual file pointer position maintained by the system) a total number of
|
|
.I count
|
|
data items having
|
|
.I datatype
|
|
type into the user's buffer
|
|
.I buf.
|
|
The data is taken out of those parts of the
|
|
file specified by the current view. MPI_File_read stores the
|
|
number of data-type elements actually read in
|
|
.I status.
|
|
All other fields of
|
|
.I status
|
|
are undefined.
|
|
.sp
|
|
It is erroneous to call this function if MPI_MODE_SEQUENTIAL mode was specified when the file was opened.
|
|
|
|
.SH ERRORS
|
|
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object.
|
|
.sp
|
|
Before the error value is returned, the current MPI error handler is
|
|
called. For MPI I/O function errors, the default error handler is set to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL may be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.
|
|
|