Open MPI logo

MPI_Type_delete_attr(3) man page (version 1.10.1)

  |   Home   |   Support   |   FAQ   |  

« Return to documentation listing

Table of Contents


MPI_Type_delete_attr - Deletes a datatype-caching attribute value associated with a key.


C Syntax

#include <mpi.h>
int MPI_Type_delete_attr(MPI_Datatype type, int type_keyval)

Fortran Syntax

INCLUDE ’mpif.h’

C++ Syntax

#include <mpi.h>
void MPI::Datatype::Delete_attr(int type_keyval)

Input/Output Parameter

Data type from which the attribute is deleted (handle).n

Input Parameter

Key value (integer).

Output Parameter

Fortran only: Error status (integer).


MPI_Type_delete_attr deletes a datatype-caching attribute value associated with a key. This routines partially replaces MPI_Attr_delete, which is now deprecated.


Note that it is not defined by the MPI standard what happens if the delete_fn callback invokes other MPI functions. In Open MPI, it is not valid for delete_fn callbacks (or any of their children) to add or delete attributes on the same object on which the delete_fn callback is being invoked.


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.

Before the error value is returned, the current MPI error handler is 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.

Table of Contents

« Return to documentation listing