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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: tcreatestruct.c,v 1.6 2002/12/11 19:15:14 jsquyres Exp $
*
* Function: - create extended struct derived datatype
* Accepts: - # blocks
* - block length array
* - block displacement array (in bytes)
* - block element datatype array
* - new datatype (out)
* Returns: - MPI_SUCCESS or error code
*/
#include <errno.h>
#include <stdlib.h>
#include <blktype.h>
#include <mpi.h>
#include <mpisys.h>
/*@
MPI_Type_create_struct - Create extended struct derived datatype
Input Parameters:
+ count - Number of blocks (nonnegative integer)
. lengths - Number of elements in each block (array of integer)
. displacement - Byte displacement of each block (array of integer)
- oldtypes - Type of elements in each block (array of handles to datatype objects)
Output Parameter:
+ newtype - New datatype (handle)
.N fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_TYPE
.N MPI_ERR_COUNT
.N MPI_ERR_ARG
.N MPI_ERR_OTHER
.seealso MPI_Type_create_hvector(3), MPI_Type_create_hindexed(3), MPI_Get_address(3)
.N WEB
@*/
int
MPI_Type_create_struct(int count, int *lengths, MPI_Aint *disps,
MPI_Datatype *oldtypes, MPI_Datatype *newtype)
{
MPI_Datatype ntype; /* new datatype */
int i;
lam_initerr_m();
lam_setfunc_m(BLKMPITCREATESTRUCT);
/*
* Check the arguments.
*/
if (count < 0) {
return(lam_errfunc(MPI_COMM_WORLD, BLKMPITCREATESTRUCT,
lam_mkerr(MPI_ERR_COUNT, EINVAL)));
}
if ((newtype == 0) || ((count > 0) &&
((lengths == 0) || (disps == 0) || (oldtypes == 0)))) {
return(lam_errfunc(MPI_COMM_WORLD, BLKMPITCREATESTRUCT,
lam_mkerr(MPI_ERR_ARG, EINVAL)));
}
for (i = 0; i < count; ++i) {
if (oldtypes[i] == MPI_DATATYPE_NULL) {
return(lam_errfunc(MPI_COMM_WORLD, BLKMPITCREATESTRUCT,
lam_mkerr(MPI_ERR_TYPE, EINVAL)));
}
if (lengths[i] < 0) {
return(lam_errfunc(MPI_COMM_WORLD, BLKMPITCREATESTRUCT,
lam_mkerr(MPI_ERR_ARG, EINVAL)));
}
}
/*
* Create the new datatype.
*/
ntype = (MPI_Datatype) malloc(sizeof(struct _dtype));
if (ntype == 0) {
return(lam_errfunc(MPI_COMM_WORLD, BLKMPITCREATESTRUCT,
lam_mkerr(MPI_ERR_OTHER, errno)));
}
LAM_ZERO_ME(*ntype);
lam_type_setdefaults(ntype);
if (count > 0) {
ntype->dt_dtypes = (MPI_Datatype *) malloc((unsigned)
(count * (sizeof(MPI_Datatype)
+ sizeof(MPI_Aint) + sizeof(int))));
if (ntype->dt_dtypes == 0) {
free((char *) ntype);
return(lam_errfunc(MPI_COMM_WORLD, BLKMPITCREATESTRUCT,
lam_mkerr(MPI_ERR_OTHER, errno)));
}
ntype->dt_disps = (MPI_Aint *) (((char *) ntype->dt_dtypes) +
(count * sizeof(MPI_Datatype)));
ntype->dt_lengths = (int *) (((char *) ntype->dt_disps) +
(count * sizeof(MPI_Aint)));
} else {
ntype->dt_flags = LAM_DTNOPACK | LAM_DTNOXADJ;
ntype->dt_size = 0;
}
ntype->dt_format = LAM_DTSTRUCTCREAT;
ntype->dt_count = count;
/*
* Compute the extent, # elements, and data size.
*/
for (i = 0; i < count; ++i) {
ntype->dt_disps[i] = disps[i];
ntype->dt_lengths[i] = lengths[i];
ntype->dt_dtypes[i] = oldtypes[i];
oldtypes[i]->dt_refcount++;
lam_dtblock(ntype, oldtypes[i], lengths[i], disps[i]);
}
if (ntype->dt_size > 0) {
if (ntype->dt_datalow != 0 || ntype->dt_lower != 0) {
ntype->dt_flags &= ~LAM_DTNOPACK;
}
lam_dtalign(ntype);
}
*newtype = ntype;
lam_resetfunc_m(BLKMPITCREATESTRUCT);
return(MPI_SUCCESS);
}
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