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NAME
MPI_Comm_delete_attr - Deletes attribute value associated with a key.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Comm_delete_attr(MPI_Comm comm, int comm_keyval)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_Comm_delete_attr(COMM, COMM_KEYVAL, IERROR)
INTEGER COMM, COMM_KEYVAL, IERROR
C++ Syntax
#include <mpi.h>
void MPI::Comm::Delete_attr(int comm_keyval)
INPUT/OUTPUT PARAMETER
comm Communicator from which the attribute is deleted (handle).
INPUT PARAMETER
comm_keyval
Key value (integer).
OUTPUT PARAMETER
IERROR Fortran only: Error status (integer).
DESCRIPTION
MPI_Comm_delete_attr deletes an attribute from cache by key. This func-
tion invokes the attribute delete function delete_fn specified when the
comm_keyval was created. The call will fail if the delete_fn function
returns an error code other than MPI_SUCCESS.
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.
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.
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++ func-
tions 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.
1.3.4 Nov 11, 2009 MPI_Comm_delete_attr(3)
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