96 строки
3.1 KiB
Plaintext
96 строки
3.1 KiB
Plaintext
.\" -*- nroff -*-
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.\" Copyright 2010 Cisco Systems, Inc. All rights reserved.
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.\" Copyright 2006-2008 Sun Microsystems, Inc.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.\" Copyright 2015-2016 Research Organization for Information Science
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.\" and Technology (RIST). All rights reserved.
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.\" $COPYRIGHT$
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.TH MPI_File_iread_all 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_File_iread_all\fP \- Reads a file starting at the location specified by the individual file pointer (nonblocking, collective).
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.SH SYNTAX
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.ft R
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.nf
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.SH C Syntax
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.nf
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#include <mpi.h>
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int MPI_File_iread_all(MPI_File \fIfh\fP, void \fI*buf\fP, int \fIcount\fP,
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MPI_Datatype \fIdatatype\fP, MPI_Request \fI*request\fP)
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.fi
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.SH Fortran Syntax
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.nf
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USE MPI
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! or the older form: INCLUDE 'mpif.h'
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MPI_FILE_IREAD_ALL(\fIFH\fP, \fIBUF\fP, \fICOUNT\fP, \fIDATATYPE\fP, \fIREQUEST\fP, \fIIERROR\fP)
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<type> \fIBUF(*)\fP
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INTEGER \fIFH, COUNT, DATATYPE, REQUEST, IERROR\fP
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.fi
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.SH Fortran 2008 Syntax
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.nf
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USE mpi_f08
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MPI_File_iread_all(\fIfh\fP, \fIbuf\fP, \fIcount\fP, \fIdatatype\fP, \fIrequest\fP, \fIierror\fP)
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TYPE(MPI_File), INTENT(IN) :: \fIfh\fP
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TYPE(*), DIMENSION(..) :: \fIbuf\fP
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INTEGER, INTENT(IN) :: \fIcount\fP
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TYPE(MPI_Datatype), INTENT(IN) :: \fIdatatype\fP
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TYPE(MPI_Request), INTENT(OUT) :: \fIrequest\fP
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INTEGER, OPTIONAL, INTENT(OUT) :: \fIierror\fP
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.fi
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.SH INPUT/OUTPUT PARAMETER
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.ft R
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.TP 1i
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fh
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File handle (handle).
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.SH INPUT PARAMETERS
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.ft R
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.TP 1i
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count
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Number of elements in the buffer (integer).
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.ft R
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.TP 1i
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datatype
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Data type of each buffer element (handle).
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1i
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buf
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Initial address of buffer (choice).
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.ft R
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.TP 1i
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request
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Request object (handle).
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.TP 1i
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IERROR
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Fortran only: Error status (integer).
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.SH DESCRIPTION
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.ft R
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MPI_File_iread_all is a nonblocking version of MPI_File_read_all. It attempts to read from the file associated with
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.I fh
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at the current individual file pointer position maintained by the system in which a total number of
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.I count
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data items having
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.I datatype
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type are read into the user's buffer
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.I buf.
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The data is taken out of those parts of the
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file specified by the current view. MPI_File_iread_all stores the
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number of data-type elements actually read in
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.I status.
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All other fields of
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.I status
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are undefined. It is erroneous to call this function if MPI_MODE_SEQUENTIAL mode was specified when the file was opened.
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.SH ERRORS
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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.
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.sp
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Before the error value is returned, the current MPI error handler is
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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.
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