62 строки
2.4 KiB
Plaintext
62 строки
2.4 KiB
Plaintext
.\" 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
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.TH MPI_Comm_delete_attr 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_Comm_delete_attr\fP \- Deletes attribute value associated with a key.
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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_Comm_delete_attr(MPI_Comm \fIcomm\fP, int \fIcomm_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_Comm_delete_attr(\fICOMM, COMM_KEYVAL, IERROR\fP)
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INTEGER \fICOMM, COMM_KEYVAL, IERROR \fP
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.fi
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.SH C++ Syntax
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.nf
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#include <mpi.h>
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void MPI::Comm::Delete_attr(int \fIcomm_keyval\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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comm
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Communicator from which the attribute is deleted (handle).
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.SH INPUT PARAMETER
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.ft R
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.TP 1i
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comm_keyval
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Key value (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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.ft R
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MPI_Comm_delete_attr deletes an attribute from cache by key. This function invokes the attribute delete function delete_fn specified when the \fIcomm_keyval\fP 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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.sp
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This function is the same as MPI_Attr_delete but is needed to match the communicator-specific functions introduced in the MPI-2 standard. The use of MPI_Attr_delete is deprecated.
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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 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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