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/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
* Copyright (c) 2004-2006 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef DATATYPE_UNPACK_H_HAS_BEEN_INCLUDED
#define DATATYPE_UNPACK_H_HAS_BEEN_INCLUDED
static inline void unpack_predefined_data( ompi_convertor_t* CONVERTOR, /* the convertor */
dt_elem_desc_t* ELEM, /* the element description */
uint32_t* COUNT, /* the number of elements */
char** SOURCE, /* the source pointer */
char** DESTINATION, /* the destination pointer */
size_t* SPACE ) /* the space in the destination buffer */
{
uint32_t _copy_count = *(COUNT);
size_t _copy_blength;
ddt_elem_desc_t* _elem = &((ELEM)->elem);
char* _destination = (*DESTINATION) + _elem->disp;
_copy_blength = ompi_ddt_basicDatatypes[_elem->common.type]->size;
if( (_copy_count * _copy_blength) > *(SPACE) ) {
_copy_count = (uint32_t)(*(SPACE) / _copy_blength);
if( 0 == _copy_count ) return; /* nothing to do */
}
if( _copy_blength == (uint32_t)_elem->extent ) {
_copy_blength *= _copy_count;
/* the extent and the size of the basic datatype are equals */
OMPI_DDT_SAFEGUARD_POINTER( _destination, _copy_blength, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count );
DO_DEBUG( opal_output( 0, "unpack 1. memcpy( %p, %p, %lu ) => space %lu\n",
_destination, *(SOURCE), (unsigned long)_copy_blength, (unsigned long)(*(SPACE)) ); );
MEMCPY_CSUM( _destination, *(SOURCE), _copy_blength, (CONVERTOR) );
*(SOURCE) += _copy_blength;
_destination += _copy_blength;
} else {
uint32_t _i;
for( _i = 0; _i < _copy_count; _i++ ) {
OMPI_DDT_SAFEGUARD_POINTER( _destination, _copy_blength, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count );
DO_DEBUG( opal_output( 0, "unpack 2. memcpy( %p, %p, %lu ) => space %lu\n",
_destination, *(SOURCE), (unsigned long)_copy_blength, (unsigned long)(*(SPACE) - (_i * _copy_blength)) ); );
MEMCPY_CSUM( _destination, *(SOURCE), _copy_blength, (CONVERTOR) );
*(SOURCE) += _copy_blength;
_destination += _elem->extent;
}
_copy_blength *= _copy_count;
}
(*DESTINATION) = _destination - _elem->disp;
*(SPACE) -= _copy_blength;
*(COUNT) -= _copy_count;
}
static inline void unpack_contiguous_loop( ompi_convertor_t* CONVERTOR,
dt_elem_desc_t* ELEM,
uint32_t* COUNT,
char** SOURCE,
char** DESTINATION,
size_t* SPACE )
{
ddt_loop_desc_t *_loop = (ddt_loop_desc_t*)(ELEM);
ddt_endloop_desc_t* _end_loop = (ddt_endloop_desc_t*)((ELEM) + _loop->items);
char* _destination = (*DESTINATION) + _end_loop->first_elem_disp;
uint32_t _copy_loops = *(COUNT);
uint32_t _i;
if( (_copy_loops * _end_loop->size) > *(SPACE) )
_copy_loops = (uint32_t)(*(SPACE) / _end_loop->size);
for( _i = 0; _i < _copy_loops; _i++ ) {
OMPI_DDT_SAFEGUARD_POINTER( _destination, _end_loop->size, (CONVERTOR)->pBaseBuf,
(CONVERTOR)->pDesc, (CONVERTOR)->count );
DO_DEBUG( opal_output( 0, "unpack 3. memcpy( %p, %p, %lu ) => space %lu\n",
_destination, *(SOURCE), (unsigned long)_end_loop->size, (unsigned long)(*(SPACE) - _i * _end_loop->size) ); );
MEMCPY_CSUM( _destination, *(SOURCE), _end_loop->size, (CONVERTOR) );
*(SOURCE) += _end_loop->size;
_destination += _loop->extent;
}
*(DESTINATION) = _destination - _end_loop->first_elem_disp;
*(SPACE) -= _copy_loops * _end_loop->size;
*(COUNT) -= _copy_loops;
}
#define UNPACK_PREDEFINED_DATATYPE( CONVERTOR, ELEM, COUNT, SOURCE, DESTINATION, SPACE ) \
unpack_predefined_data( (CONVERTOR), (ELEM), &(COUNT), &(SOURCE), &(DESTINATION), &(SPACE) )
#define UNPACK_CONTIGUOUS_LOOP( CONVERTOR, ELEM, COUNT, SOURCE, DESTINATION, SPACE ) \
unpack_contiguous_loop( (CONVERTOR), (ELEM), &(COUNT), &(SOURCE), &(DESTINATION), &(SPACE) )
#endif /* DATATYPE_UNPACK_H_HAS_BEEN_INCLUDED */
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