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openmpi/ompi/mpi/c/unpack.c
2005-07-03 16:06:07 +00:00

94 строки
3.0 KiB
C

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
* All rights reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include <stdio.h>
#include "mpi.h"
#include "mpi/c/bindings.h"
#include "datatype/datatype.h"
#include "datatype/convertor.h"
#include "errhandler/errhandler.h"
#include "communicator/communicator.h"
#include "opal/class/opal_object.h"
#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Unpack = PMPI_Unpack
#endif
#if OMPI_PROFILING_DEFINES
#include "mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Unpack";
int MPI_Unpack(void *inbuf, int insize, int *position,
void *outbuf, int outcount, MPI_Datatype datatype,
MPI_Comm comm)
{
int rc, freeAfter;
ompi_convertor_t local_convertor;
struct iovec outvec;
unsigned int iov_count;
size_t size;
if (MPI_PARAM_CHECK) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
FUNC_NAME);
}
if ((NULL == inbuf) || (NULL == position)) { /* outbuf can be MPI_BOTTOM */
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_ARG, FUNC_NAME);
}
if (outcount < 0) {
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_COUNT, FUNC_NAME);
}
if (MPI_DATATYPE_NULL == datatype) {
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_TYPE, FUNC_NAME);
}
}
/* the resulting convertor will be set the the position ZERO */
ompi_convertor_copy_and_prepare_for_recv( NULL, datatype, outcount, outbuf, &local_convertor );
/* Check for truncation */
ompi_convertor_get_packed_size( &local_convertor, &size );
if( (*position + size) > (unsigned int)insize ) {
OBJ_DESTRUCT( &local_convertor );
return OMPI_ERRHANDLER_INVOKE(comm, MPI_ERR_TRUNCATE, FUNC_NAME);
}
/* Prepare the iovec with all informations */
outvec.iov_base = (char*) inbuf + (*position);
outvec.iov_len = insize - (*position);
/* Do the actual unpacking */
iov_count = 1;
rc = ompi_convertor_unpack( &local_convertor, &outvec, &iov_count,
&size, &freeAfter );
*position += size;
OBJ_DESTRUCT( &local_convertor );
/* All done. Note that the convertor returns 1 upon success, not
OMPI_SUCCESS. */
OMPI_ERRHANDLER_RETURN((rc == 1) ? OMPI_SUCCESS : OMPI_ERROR,
comm, MPI_ERR_UNKNOWN, FUNC_NAME);
}