70 строки
2.7 KiB
Plaintext
70 строки
2.7 KiB
Plaintext
.\" -*- nroff -*-
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.\" Copyright (c) 2010-2014 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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.\" $COPYRIGHT$
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.TH MPI_Attr_delete 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_Attr_delete\fP \- Deletes attribute value associated with a key -- use of this routine is deprecated.
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.SH SYNTAX
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.ft R
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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_Attr_delete(MPI_Comm\fI comm\fP, int\fI keyval\fP)
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.fi
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.SH Fortran Syntax
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.nf
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INCLUDE 'mpif.h'
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MPI_ATTR_DELETE(\fICOMM\fP,\fI KEYVAL\fP, \fIIERROR\fP)
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INTEGER \fICOMM\fP,\fI KEYVAL\fP,\fI IERROR\fP
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.fi
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.SH INPUT PARAMETERS
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.ft R
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.TP 1i
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comm
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Communicator to which attribute is attached (handle).
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.TP 1i
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keyval
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The key value of the deleted attribute (integer).
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.SH OUTPUT PARAMETER
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.ft R
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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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Note that use of this routine is \fIdeprecated\fP as of MPI-2, and
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was \fIdeleted\fP in MPI-3. Please use MPI_Comm_delete_attr. This
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function does not have a C++ or mpi_f08 binding.
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.sp
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Delete attribute from cache by key. This function invokes the attribute delete function delete_fn specified when the keyval was created. The call will fail if the delete_fn function returns an error code other than MPI_SUCCESS.
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Whenever a communicator is replicated using the function MPI_Comm_dup, all callback copy functions for attributes that are currently set are invoked (in arbitrary order). Whenever a communicator is deleted using the function MPI_Comm_free, all callback delete functions for attributes that are currently set are invoked.
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.SH NOTES
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Note that it is not defined by the MPI standard what happens if the
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delete_fn callback invokes other MPI functions. In Open MPI, it is
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not valid for delete_fn callbacks (or any of their children) to add or
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delete attributes on the same object on which the delete_fn callback
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is being invoked.
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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. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler
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may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
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.SH SEE ALSO
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MPI_Comm_delete_attr
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.br
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