3312aa4b0a
sure we provide exactly the amount of data these functions expect, otherwise they will return 0. This commit was SVN r11484.
84 строки
3.0 KiB
C
84 строки
3.0 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "ompi/mpi/c/bindings.h"
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#include "ompi/datatype/datatype.h"
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#include "ompi/datatype/convertor.h"
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#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
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#pragma weak MPI_Unpack_external = PMPI_Unpack_external
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#endif
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#if OMPI_PROFILING_DEFINES
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#include "ompi/mpi/c/profile/defines.h"
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#endif
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static const char FUNC_NAME[] = "MPI_Unpack_external ";
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int MPI_Unpack_external (char *datarep, void *inbuf, MPI_Aint insize,
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MPI_Aint *position, void *outbuf, int outcount,
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MPI_Datatype datatype)
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{
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int rc, freeAfter;
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ompi_convertor_t local_convertor;
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struct iovec outvec;
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unsigned int iov_count;
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size_t size;
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if (MPI_PARAM_CHECK) {
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OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
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if ((NULL == inbuf) || (NULL == position)) { /* outbuf can be MPI_BOTTOM */
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_ARG, FUNC_NAME);
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} else if (outcount < 0) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COUNT, FUNC_NAME);
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} else if (MPI_DATATYPE_NULL == datatype) {
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_TYPE, FUNC_NAME);
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}
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}
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OBJ_CONSTRUCT(&local_convertor, ompi_convertor_t);
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/* the resulting convertor will be set to the position ZERO */
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ompi_convertor_copy_and_prepare_for_recv( ompi_mpi_external32_convertor,
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datatype, outcount, outbuf, 0, &local_convertor );
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/* Check for truncation */
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ompi_convertor_get_packed_size( &local_convertor, &size );
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if( (*position + size) > (unsigned int)insize ) {
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OBJ_DESTRUCT( &local_convertor );
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return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_TRUNCATE, FUNC_NAME);
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}
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/* Prepare the iovec with all informations */
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outvec.iov_base = (char*) inbuf + (*position);
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outvec.iov_len = size;
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/* Do the actual unpacking */
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iov_count = 1;
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rc = ompi_convertor_unpack( &local_convertor, &outvec, &iov_count, &size, &freeAfter );
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*position += size;
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OBJ_DESTRUCT( &local_convertor );
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/* All done. Note that the convertor returns 1 upon success, not
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OMPI_SUCCESS. */
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OMPI_ERRHANDLER_RETURN((rc == 1) ? OMPI_SUCCESS : OMPI_ERROR,
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MPI_COMM_WORLD, MPI_ERR_UNKNOWN, FUNC_NAME);
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}
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