int MPIDU_Type_indexed(int count,
const int *blocklength_array,
const void *displacement_array,
int dispinbytes,
MPI_Datatype oldtype,
MPI_Datatype *newtype)
{
int mpi_errno = MPI_SUCCESS;
int is_builtin, old_is_contig;
int i;
MPI_Aint contig_count;
MPI_Aint el_sz, el_ct, old_ct, old_sz;
MPI_Aint old_lb, old_ub, old_extent, old_true_lb, old_true_ub;
MPI_Aint min_lb = 0, max_ub = 0, eff_disp;
MPI_Datatype el_type;
MPIDU_Datatype *new_dtp;
if (count == 0) return MPIDU_Type_zerolen(newtype);
/* sanity check that blocklens are all non-negative */
for (i = 0; i < count; ++i) {
DLOOP_Assert(blocklength_array[i] >= 0);
}
/* allocate new datatype object and handle */
new_dtp = (MPIDU_Datatype *) MPIR_Handle_obj_alloc(&MPIDU_Datatype_mem);
/* --BEGIN ERROR HANDLING-- */
if (!new_dtp)
{
mpi_errno = MPIR_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE,
"MPIDU_Type_indexed",
__LINE__,
MPI_ERR_OTHER,
"**nomem",
0);
return mpi_errno;
}
/* --END ERROR HANDLING-- */
/* handle is filled in by MPIR_Handle_obj_alloc() */
MPIR_Object_set_ref(new_dtp, 1);
new_dtp->is_permanent = 0;
new_dtp->is_committed = 0;
new_dtp->attributes = NULL;
new_dtp->cache_id = 0;
new_dtp->name[0] = 0;
new_dtp->contents = NULL;
new_dtp->dataloop = NULL;
new_dtp->dataloop_size = -1;
new_dtp->dataloop_depth = -1;
new_dtp->hetero_dloop = NULL;
new_dtp->hetero_dloop_size = -1;
new_dtp->hetero_dloop_depth = -1;
is_builtin = (HANDLE_GET_KIND(oldtype) == HANDLE_KIND_BUILTIN);
if (is_builtin)
{
/* builtins are handled differently than user-defined types because
* they have no associated dataloop or datatype structure.
*/
el_sz = MPIDU_Datatype_get_basic_size(oldtype);
old_sz = el_sz;
el_ct = 1;
el_type = oldtype;
old_lb = 0;
old_true_lb = 0;
old_ub = (MPI_Aint) el_sz;
old_true_ub = (MPI_Aint) el_sz;
old_extent = (MPI_Aint) el_sz;
old_is_contig = 1;
new_dtp->has_sticky_ub = 0;
new_dtp->has_sticky_lb = 0;
MPIR_Assign_trunc(new_dtp->alignsize, el_sz, MPI_Aint);
new_dtp->builtin_element_size = el_sz;
new_dtp->basic_type = el_type;
new_dtp->max_contig_blocks = count;
}
else
{
/* user-defined base type (oldtype) */
MPIDU_Datatype *old_dtp;
MPIDU_Datatype_get_ptr(oldtype, old_dtp);
/* Ensure that "builtin_element_size" fits into an int datatype. */
MPIR_Ensure_Aint_fits_in_int(old_dtp->builtin_element_size);
el_sz = old_dtp->builtin_element_size;
old_sz = old_dtp->size;
el_ct = old_dtp->n_builtin_elements;
el_type = old_dtp->basic_type;
old_lb = old_dtp->lb;
old_true_lb = old_dtp->true_lb;
old_ub = old_dtp->ub;
old_true_ub = old_dtp->true_ub;
old_extent = old_dtp->extent;
old_is_contig = old_dtp->is_contig;
new_dtp->has_sticky_lb = old_dtp->has_sticky_lb;
new_dtp->has_sticky_ub = old_dtp->has_sticky_ub;
new_dtp->builtin_element_size = (MPI_Aint) el_sz;
new_dtp->basic_type = el_type;
new_dtp->max_contig_blocks = 0;
for(i=0; i<count; i++)
new_dtp->max_contig_blocks
+= old_dtp->max_contig_blocks
* ((MPI_Aint ) blocklength_array[i]);
}
/* find the first nonzero blocklength element */
i = 0;
while (i < count && blocklength_array[i] == 0) i++;
if (i == count) {
MPIR_Handle_obj_free(&MPIDU_Datatype_mem, new_dtp);
return MPIDU_Type_zerolen(newtype);
}
/* priming for loop */
old_ct = blocklength_array[i];
eff_disp = (dispinbytes) ? ((MPI_Aint *) displacement_array)[i] :
(((MPI_Aint) ((int *) displacement_array)[i]) * old_extent);
MPIDU_DATATYPE_BLOCK_LB_UB((MPI_Aint) blocklength_array[i],
eff_disp,
old_lb,
old_ub,
old_extent,
min_lb,
max_ub);
/* determine min lb, max ub, and count of old types in remaining
* nonzero size blocks
*/
for (i++; i < count; i++)
{
MPI_Aint tmp_lb, tmp_ub;
if (blocklength_array[i] > 0) {
old_ct += blocklength_array[i]; /* add more oldtypes */
eff_disp = (dispinbytes) ? ((MPI_Aint *) displacement_array)[i] :
(((MPI_Aint) ((int *) displacement_array)[i]) * old_extent);
/* calculate ub and lb for this block */
MPIDU_DATATYPE_BLOCK_LB_UB((MPI_Aint)(blocklength_array[i]),
eff_disp,
old_lb,
old_ub,
old_extent,
tmp_lb,
tmp_ub);
if (tmp_lb < min_lb) min_lb = tmp_lb;
if (tmp_ub > max_ub) max_ub = tmp_ub;
}
}
new_dtp->size = old_ct * old_sz;
new_dtp->lb = min_lb;
new_dtp->ub = max_ub;
new_dtp->true_lb = min_lb + (old_true_lb - old_lb);
new_dtp->true_ub = max_ub + (old_true_ub - old_ub);
new_dtp->extent = max_ub - min_lb;
new_dtp->n_builtin_elements = old_ct * el_ct;
/* new type is only contig for N types if it's all one big
* block, its size and extent are the same, and the old type
* was also contiguous.
*/
new_dtp->is_contig = 0;
if(old_is_contig)
{
MPI_Aint *blklens = MPL_malloc(count *sizeof(MPI_Aint));
for (i=0; i<count; i++)
blklens[i] = blocklength_array[i];
contig_count = MPIDU_Type_indexed_count_contig(count,
blklens,
displacement_array,
dispinbytes,
old_extent);
new_dtp->max_contig_blocks = contig_count;
if( (contig_count == 1) &&
((MPI_Aint) new_dtp->size == new_dtp->extent))
{
new_dtp->is_contig = 1;
}
MPL_free(blklens);
}
*newtype = new_dtp->handle;
return mpi_errno;
}
int MPIR_Unpack_impl(const void *inbuf, MPI_Aint insize, MPI_Aint * position,
void *outbuf, int outcount, MPI_Datatype datatype)
{
int mpi_errno = MPI_SUCCESS;
MPI_Aint first, last;
MPIR_Segment *segp;
int contig;
MPI_Aint dt_true_lb;
MPI_Aint data_sz;
if (insize == 0)
goto fn_exit;
/* Handle contig case quickly */
if (HANDLE_GET_KIND(datatype) == HANDLE_KIND_BUILTIN) {
contig = TRUE;
dt_true_lb = 0;
data_sz = outcount * MPIR_Datatype_get_basic_size(datatype);
} else {
MPIR_Datatype *dt_ptr;
MPIR_Datatype_get_ptr(datatype, dt_ptr);
MPIR_Datatype_is_contig(datatype, &contig);
dt_true_lb = dt_ptr->true_lb;
data_sz = outcount * dt_ptr->size;
}
if (contig) {
MPIR_Memcpy((char *) outbuf + dt_true_lb, (char *) inbuf + *position, data_sz);
*position = (int) ((MPI_Aint) * position + data_sz);
goto fn_exit;
}
/* non-contig case */
segp = MPIR_Segment_alloc();
MPIR_ERR_CHKANDJUMP1(segp == NULL, mpi_errno, MPI_ERR_OTHER, "**nomem", "**nomem %s",
"MPIR_Segment_alloc");
mpi_errno = MPIR_Segment_init(outbuf, outcount, datatype, segp);
MPIR_Assert(mpi_errno == MPI_SUCCESS);
/* NOTE: the use of buffer values and positions in MPI_Unpack and in
* MPIR_Segment_unpack are quite different. See code or docs or something.
*/
first = 0;
last = SEGMENT_IGNORE_LAST;
/* Ensure that pointer increment fits in a pointer */
MPIR_Ensure_Aint_fits_in_pointer((MPIR_VOID_PTR_CAST_TO_MPI_AINT inbuf) +
(MPI_Aint) * position);
MPIR_Segment_unpack(segp, first, &last, (void *) ((char *) inbuf + *position));
/* Ensure that calculation fits into an int datatype. */
MPIR_Ensure_Aint_fits_in_int((MPI_Aint) * position + last);
*position = (int) ((MPI_Aint) * position + last);
MPIR_Segment_free(segp);
fn_exit:
return mpi_errno;
fn_fail:
goto fn_exit;
}
