106 строки
2.8 KiB
C
106 строки
2.8 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
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/*
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* Copyright (C) 1997 University of Chicago.
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* See COPYRIGHT notice in top-level directory.
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*/
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#include "adio.h"
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/* #ifdef MPISGI
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#include "mpisgi2.h"
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#endif */
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#if defined(MPICH)
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/* MPICH also provides this routine */
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void MPIR_Datatype_iscontig(MPI_Datatype datatype, int *flag);
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void ADIOI_Datatype_iscontig(MPI_Datatype datatype, int *flag)
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{
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MPIR_Datatype_iscontig(datatype, flag);
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/* if the datatype is reported as contigous, check if the true_lb is
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* non-zero, and if so, mark the datatype as noncontiguous */
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if (*flag) {
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MPI_Aint true_extent, true_lb;
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MPI_Type_get_true_extent(datatype, &true_lb, &true_extent);
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if (true_lb > 0)
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*flag = 0;
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}
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}
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#elif (defined(MPIHP) && defined(HAVE_MPI_INFO))
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/* i.e. HPMPI 1.4 only */
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int hpmp_dtiscontig(MPI_Datatype datatype);
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void ADIOI_Datatype_iscontig(MPI_Datatype datatype, int *flag)
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{
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*flag = hpmp_dtiscontig(datatype);
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}
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#elif (defined(MPISGI) && !defined(NO_MPI_SGI_type_is_contig))
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int MPI_SGI_type_is_contig(MPI_Datatype datatype);
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void ADIOI_Datatype_iscontig(MPI_Datatype datatype, int *flag)
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{
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MPI_Aint displacement;
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MPI_Type_lb(datatype, &distplacement);
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/* SGI's MPI_SGI_type_is_contig() returns true for indexed
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* datatypes with holes at the beginning, which causes
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* problems with ROMIO's use of this function.
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*/
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*flag = MPI_SGI_type_is_contig(datatype) && (displacement == 0);
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}
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#elif defined(OMPI_BUILDING) && OMPI_BUILDING
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/* void ADIOI_Datatype_iscontig(MPI_Datatype datatype, int *flag) is defined
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* and implemented in OpenMPI itself */
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#else
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void ADIOI_Datatype_iscontig(MPI_Datatype datatype, int *flag)
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{
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int nints, nadds, ntypes, combiner;
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int *ints, ni, na, nt, cb;
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MPI_Aint *adds;
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MPI_Datatype *types;
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MPI_Type_get_envelope(datatype, &nints, &nadds, &ntypes, &combiner);
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switch (combiner) {
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case MPI_COMBINER_NAMED:
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*flag = 1;
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break;
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case MPI_COMBINER_CONTIGUOUS:
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ints = (int *) ADIOI_Malloc((nints+1)*sizeof(int));
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adds = (MPI_Aint *) ADIOI_Malloc((nadds+1)*sizeof(MPI_Aint));
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types = (MPI_Datatype *) ADIOI_Malloc((ntypes+1)*sizeof(MPI_Datatype));
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MPI_Type_get_contents(datatype, nints, nadds, ntypes, ints,
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adds, types);
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ADIOI_Datatype_iscontig(types[0], flag);
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#ifndef MPISGI
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/* There is a bug in SGI's impl. of MPI_Type_get_contents. It doesn't
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return new datatypes. Therefore no need to free. */
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MPI_Type_get_envelope(types[0], &ni, &na, &nt, &cb);
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if (cb != MPI_COMBINER_NAMED) MPI_Type_free(types);
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#endif
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ADIOI_Free(ints);
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ADIOI_Free(adds);
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ADIOI_Free(types);
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break;
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default:
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*flag = 0;
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break;
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}
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/* This function needs more work. It should check for contiguity
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in other cases as well.*/
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}
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#endif
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