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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
*
* $Id: tgetattr.c,v 1.5 2002/12/11 19:15:14 jsquyres Exp $
*
* Function: - get datatype attribute value
* Accepts: - datatype
* - attribute key
* - attribute value (out)
* - found flag (out)
* Returns: - MPI_SUCCESS or error code
*/
#include <blktype.h>
#include <mpi.h>
#include <mpisys.h>
/*@
MPI_Type_get_attr - Get datatype attribute value
Input Parameters:
+ type - Datatype to which the attribute is attached (handle)
- key - Key value (integer)
Output Parameters:
+ value - Attribute value, unless flag = false
- found - False if no attribute is associated with the key (logical)
.N fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_TYPE
.N MPI_ERR_KEYVAL
.N MPI_ERR_ARG
.seealso MPI_Type_create_keyval(3), MPI_Type_free_keyval(3), MPI_Type_set_attr(3), MPI_Type_delete_attr(3)
.N WEB
@*/
int
MPI_Type_get_attr(MPI_Datatype type, int key, void *value, int *found)
{
struct _attrkey *pk;
struct _attr *p;
lam_initerr_m();
lam_setfunc_m(BLKMPITGETATTR);
/*
* Check the arguments.
*/
if (type == MPI_DATATYPE_NULL) {
return(lam_errfunc(MPI_COMM_WORLD,
BLKMPITGETATTR, lam_mkerr(MPI_ERR_TYPE, EINVAL)));
}
if ((value == 0) || (found == 0)) {
return(lam_errfunc(MPI_COMM_WORLD,
BLKMPITGETATTR, lam_mkerr(MPI_ERR_ARG, EINVAL)));
}
pk = lam_getattr(key);
if (pk == 0 || !(pk->ak_flags & LAM_AKTYPE)) {
return(lam_errfunc(MPI_COMM_WORLD,
BLKMPITGETATTR, lam_mkerr(MPI_ERR_KEYVAL, EINVAL)));
}
/*
* Check if the key is attached to the datatype
*/
p = lam_getkey(type->dt_keys, key);
if (p == 0) {
*found = 0;
} else {
*found = 1;
/*
* This stuff is very confusing. Be sure to see MPI-2 4.12.7.
*/
*((void **) value) = (pk->ak_flags & LAM_LANGF77)
? (void *) &p->a_value : p->a_value;
}
lam_resetfunc_m(BLKMPITGETATTR);
return(MPI_SUCCESS);
}
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