1 /* smpi_datatype.cpp -- MPI primitives to handle datatypes */
2 /* Copyright (c) 2009-2023. The SimGrid Team. All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 #include "simgrid/modelchecker.h"
9 #include "smpi_datatype_derived.hpp"
10 #include "smpi_op.hpp"
11 #include "src/instr/instr_private.hpp"
12 #include "src/smpi/include/smpi_actor.hpp"
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_datatype, smpi, "Logging specific to SMPI (datatype)");
22 static std::unordered_map<std::string, simgrid::smpi::Datatype*> id2type_lookup;
24 #define CREATE_MPI_DATATYPE(name, id, type, flag) \
25 simgrid::smpi::Datatype _XBT_CONCAT(smpi_MPI_, name)((char*)"MPI_"#name, (id), sizeof(type), /* size */ \
27 sizeof(type), /* ub = lb + size */ \
28 DT_FLAG_BASIC | flag /* flags */ \
31 #define CREATE_MPI_DATATYPE_NULL(name, id) \
32 simgrid::smpi::Datatype _XBT_CONCAT(smpi_MPI_, name)((char*)"MPI_"#name, (id), 0, /* size */ \
34 0, /* ub = lb + size */ \
35 DT_FLAG_BASIC /* flags */ \
38 // Predefined data types
39 CREATE_MPI_DATATYPE_NULL(DATATYPE_NULL, -1)
40 CREATE_MPI_DATATYPE(DOUBLE, 0, double, DT_FLAG_FP)
41 CREATE_MPI_DATATYPE(INT, 1, int, DT_FLAG_C_INTEGER)
42 CREATE_MPI_DATATYPE(CHAR, 2, char, DT_FLAG_C_INTEGER)
43 CREATE_MPI_DATATYPE(SHORT, 3, short, DT_FLAG_C_INTEGER)
44 CREATE_MPI_DATATYPE(LONG, 4, long, DT_FLAG_C_INTEGER)
45 CREATE_MPI_DATATYPE(FLOAT, 5, float, DT_FLAG_FP)
46 CREATE_MPI_DATATYPE(BYTE, 6, int8_t, DT_FLAG_BYTE)
47 CREATE_MPI_DATATYPE(LONG_LONG, 7, long long, DT_FLAG_C_INTEGER)
48 CREATE_MPI_DATATYPE(SIGNED_CHAR, 8, signed char, DT_FLAG_C_INTEGER)
49 CREATE_MPI_DATATYPE(UNSIGNED_CHAR, 9, unsigned char, DT_FLAG_C_INTEGER)
50 CREATE_MPI_DATATYPE(UNSIGNED_SHORT, 10, unsigned short, DT_FLAG_C_INTEGER)
51 CREATE_MPI_DATATYPE(UNSIGNED, 11, unsigned int, DT_FLAG_C_INTEGER)
52 CREATE_MPI_DATATYPE(UNSIGNED_LONG, 12, unsigned long, DT_FLAG_C_INTEGER)
53 CREATE_MPI_DATATYPE(UNSIGNED_LONG_LONG, 13, unsigned long long, DT_FLAG_C_INTEGER)
54 CREATE_MPI_DATATYPE(LONG_DOUBLE, 14, long double, DT_FLAG_FP)
55 CREATE_MPI_DATATYPE(WCHAR, 15, wchar_t, DT_FLAG_BASIC)
56 CREATE_MPI_DATATYPE(C_BOOL, 16, bool, DT_FLAG_LOGICAL)
57 CREATE_MPI_DATATYPE(INT8_T, 17, int8_t, DT_FLAG_C_INTEGER)
58 CREATE_MPI_DATATYPE(INT16_T, 18, int16_t, DT_FLAG_C_INTEGER)
59 CREATE_MPI_DATATYPE(INT32_T, 19, int32_t, DT_FLAG_C_INTEGER)
60 CREATE_MPI_DATATYPE(INT64_T, 20, int64_t, DT_FLAG_C_INTEGER)
61 CREATE_MPI_DATATYPE(UINT8_T, 21, uint8_t, DT_FLAG_C_INTEGER)
62 CREATE_MPI_DATATYPE(UINT16_T, 22, uint16_t, DT_FLAG_C_INTEGER)
63 CREATE_MPI_DATATYPE(UINT32_T, 23, uint32_t, DT_FLAG_C_INTEGER)
64 CREATE_MPI_DATATYPE(UINT64_T, 24, uint64_t, DT_FLAG_C_INTEGER)
65 CREATE_MPI_DATATYPE(C_FLOAT_COMPLEX, 25, float _Complex, DT_FLAG_COMPLEX)
66 CREATE_MPI_DATATYPE(C_DOUBLE_COMPLEX, 26, double _Complex, DT_FLAG_COMPLEX)
67 CREATE_MPI_DATATYPE(C_LONG_DOUBLE_COMPLEX, 27, long double _Complex, DT_FLAG_COMPLEX)
68 CREATE_MPI_DATATYPE(AINT, 28, MPI_Aint, DT_FLAG_MULTILANG)
69 CREATE_MPI_DATATYPE(OFFSET, 29, MPI_Offset, DT_FLAG_MULTILANG)
71 CREATE_MPI_DATATYPE(FLOAT_INT, 30, float_int, DT_FLAG_REDUCTION)
72 CREATE_MPI_DATATYPE(LONG_INT, 31, long_int, DT_FLAG_REDUCTION)
73 CREATE_MPI_DATATYPE(DOUBLE_INT, 32, double_int, DT_FLAG_REDUCTION)
74 CREATE_MPI_DATATYPE(SHORT_INT, 33, short_int, DT_FLAG_REDUCTION)
75 CREATE_MPI_DATATYPE(2INT, 34, int_int, DT_FLAG_REDUCTION)
76 CREATE_MPI_DATATYPE(2FLOAT, 35, float_float, DT_FLAG_REDUCTION)
77 CREATE_MPI_DATATYPE(2DOUBLE, 36, double_double, DT_FLAG_REDUCTION)
78 CREATE_MPI_DATATYPE(2LONG, 37, long_long, DT_FLAG_REDUCTION)
80 CREATE_MPI_DATATYPE(REAL, 38, float, DT_FLAG_FP)
81 CREATE_MPI_DATATYPE(REAL4, 39, float, DT_FLAG_FP)
82 CREATE_MPI_DATATYPE(REAL8, 40, double, DT_FLAG_FP)
83 CREATE_MPI_DATATYPE(REAL16, 41, long double, DT_FLAG_FP)
84 CREATE_MPI_DATATYPE(COMPLEX8, 42, float_float, DT_FLAG_COMPLEX)
85 CREATE_MPI_DATATYPE(COMPLEX16, 43, double_double, DT_FLAG_COMPLEX)
86 CREATE_MPI_DATATYPE(COMPLEX32, 44, double_double, DT_FLAG_COMPLEX)
87 CREATE_MPI_DATATYPE(INTEGER1, 45, int, DT_FLAG_F_INTEGER)
88 CREATE_MPI_DATATYPE(INTEGER2, 46, int16_t, DT_FLAG_F_INTEGER)
89 CREATE_MPI_DATATYPE(INTEGER4, 47, int32_t, DT_FLAG_F_INTEGER)
90 CREATE_MPI_DATATYPE(INTEGER8, 48, int64_t, DT_FLAG_F_INTEGER)
91 CREATE_MPI_DATATYPE(INTEGER16, 49, integer128_t, DT_FLAG_F_INTEGER)
93 CREATE_MPI_DATATYPE(LONG_DOUBLE_INT, 50, long_double_int, DT_FLAG_REDUCTION)
94 CREATE_MPI_DATATYPE(CXX_BOOL, 51, bool, DT_FLAG_LOGICAL)
95 CREATE_MPI_DATATYPE(CXX_FLOAT_COMPLEX, 52, std::complex<float>, DT_FLAG_COMPLEX)
96 CREATE_MPI_DATATYPE(CXX_DOUBLE_COMPLEX, 53, std::complex<double>, DT_FLAG_COMPLEX)
97 CREATE_MPI_DATATYPE(CXX_LONG_DOUBLE_COMPLEX, 54, std::complex<long double>, DT_FLAG_COMPLEX)
99 CREATE_MPI_DATATYPE_NULL(UB, 55)
100 CREATE_MPI_DATATYPE_NULL(LB, 56)
101 CREATE_MPI_DATATYPE(PACKED, 57, char, DT_FLAG_PREDEFINED)
103 CREATE_MPI_DATATYPE(PTR, 58, void*, DT_FLAG_PREDEFINED)
104 CREATE_MPI_DATATYPE(COUNT, 59, long long, DT_FLAG_MULTILANG)
105 MPI_Datatype MPI_PTR = &smpi_MPI_PTR;
107 namespace simgrid::smpi {
109 std::unordered_map<int, smpi_key_elem> Datatype::keyvals_; // required by the Keyval class implementation
110 int Datatype::keyval_id_=0; // required by the Keyval class implementation
111 Datatype::Datatype(int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags) : Datatype(size, lb, ub, flags)
113 id = std::to_string(ident);
116 Datatype::Datatype(int size, MPI_Aint lb, MPI_Aint ub, int flags) : size_(size), lb_(lb), ub_(ub), flags_(flags)
119 MC_ignore(&refcount_, sizeof refcount_);
122 // for predefined types, so refcount_ = 0.
123 Datatype::Datatype(const char* name, int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags)
124 : name_(name), id(std::to_string(ident)), size_(size), lb_(lb), ub_(ub), flags_(flags), refcount_(0)
126 id2type_lookup.try_emplace(id, this);
127 MC_ignore(&refcount_, sizeof refcount_);
130 Datatype::Datatype(Datatype* datatype, int* ret)
131 : size_(datatype->size_), lb_(datatype->lb_), ub_(datatype->ub_), flags_(datatype->flags_), duplicated_datatype_(datatype)
135 *ret = this->copy_attrs(datatype);
138 Datatype::~Datatype()
140 xbt_assert(refcount_ >= 0);
142 if(flags_ & DT_FLAG_PREDEFINED)
144 //prevent further usage
145 flags_ &= ~ DT_FLAG_COMMITED;
146 if(duplicated_datatype_ != MPI_DATATYPE_NULL)
147 unref(duplicated_datatype_);
148 F2C::free_f(this->f2c_id());
149 //if still used, mark for deletion
151 flags_ |=DT_FLAG_DESTROYED;
154 cleanup_attr<Datatype>();
157 int Datatype::copy_attrs(Datatype* datatype){
158 flags_ &= ~DT_FLAG_PREDEFINED;
160 set_contents(MPI_COMBINER_DUP, 0, nullptr, 0, nullptr, 1, &datatype);
161 for (auto const& [key, value] : datatype->attributes()) {
162 auto elem_it = keyvals_.find(key);
163 xbt_assert(elem_it != keyvals_.end(), "Keyval not found for Datatype: %d", key);
165 smpi_key_elem& elem = elem_it->second;
166 int ret = MPI_SUCCESS;
168 void* value_out = nullptr;
169 if (elem.copy_fn.type_copy_fn == MPI_TYPE_DUP_FN) {
172 } else if (elem.copy_fn.type_copy_fn != MPI_NULL_COPY_FN) {
173 ret = elem.copy_fn.type_copy_fn(datatype, key, elem.extra_state, value, &value_out, &flag);
175 if (ret != MPI_SUCCESS)
178 if (elem.copy_fn.type_copy_fn_fort != MPI_NULL_COPY_FN) {
179 value_out = xbt_new(int, 1);
180 if (*(int*)*elem.copy_fn.type_copy_fn_fort == 1) { // MPI_TYPE_DUP_FN
181 memcpy(value_out, value, sizeof(int));
183 } else { // not null, nor dup
184 elem.copy_fn.type_copy_fn_fort(datatype, key, elem.extra_state, value, value_out, &flag, &ret);
186 if (ret != MPI_SUCCESS) {
193 attributes().try_emplace(key, value_out);
199 int Datatype::clone(MPI_Datatype* type){
201 *type = new Datatype(this, &ret);
208 MC_ignore(&refcount_, sizeof refcount_);
211 void Datatype::unref(MPI_Datatype datatype)
213 if (datatype->refcount_ > 0)
214 datatype->refcount_--;
215 MC_ignore(&datatype->refcount_, sizeof datatype->refcount_);
217 if (datatype->refcount_ == 0 && not(datatype->flags_ & DT_FLAG_PREDEFINED))
221 void Datatype::commit()
223 flags_ |= DT_FLAG_COMMITED;
226 bool Datatype::is_valid() const
228 return (flags_ & DT_FLAG_COMMITED);
231 bool Datatype::is_basic() const
233 return (flags_ & DT_FLAG_BASIC);
236 MPI_Datatype Datatype::decode(const std::string& datatype_id)
238 return id2type_lookup.find(datatype_id)->second;
241 void Datatype::addflag(int flag){
245 int Datatype::extent(MPI_Aint* lb, MPI_Aint* extent) const
252 void Datatype::get_name(char* name, int* length) const
254 *length = static_cast<int>(name_.length());
255 if (not name_.empty()) {
256 name_.copy(name, *length);
257 name[*length] = '\0';
261 void Datatype::set_name(const char* name)
266 int Datatype::pack(const void* inbuf, int incount, void* outbuf, int outcount, int* position, const Comm*)
268 if (outcount - *position < incount*static_cast<int>(size_))
269 return MPI_ERR_OTHER;
270 Datatype::copy(inbuf, incount, this, static_cast<char*>(outbuf) + *position, outcount, MPI_CHAR);
271 *position += incount * size_;
275 int Datatype::unpack(const void* inbuf, int insize, int* position, void* outbuf, int outcount, const Comm*)
277 if (outcount*static_cast<int>(size_)> insize)
278 return MPI_ERR_OTHER;
279 Datatype::copy(static_cast<const char*>(inbuf) + *position, insize, MPI_CHAR, outbuf, outcount, this);
280 *position += outcount * size_;
284 int Datatype::get_contents(int max_integers, int max_addresses, int max_datatypes, int* array_of_integers,
285 MPI_Aint* array_of_addresses, MPI_Datatype* array_of_datatypes) const
287 if(contents_==nullptr)
289 if (static_cast<unsigned>(max_integers) < contents_->integers_.size())
290 return MPI_ERR_COUNT;
291 std::copy(begin(contents_->integers_), end(contents_->integers_), array_of_integers);
292 if (static_cast<unsigned>(max_addresses) < contents_->addresses_.size())
293 return MPI_ERR_COUNT;
294 std::copy(begin(contents_->addresses_), end(contents_->addresses_), array_of_addresses);
295 if (static_cast<unsigned>(max_datatypes) < contents_->datatypes_.size())
296 return MPI_ERR_COUNT;
297 std::copy(begin(contents_->datatypes_), end(contents_->datatypes_), array_of_datatypes);
298 for (auto& datatype : contents_->datatypes_)
303 int Datatype::get_envelope(int* num_integers, int* num_addresses, int* num_datatypes, int* combiner) const
305 if(contents_==nullptr){
309 *combiner = MPI_COMBINER_NAMED;
311 *num_integers = contents_->integers_.size();
312 *num_addresses = contents_->addresses_.size();
313 *num_datatypes = contents_->datatypes_.size();
314 *combiner = contents_->combiner_;
319 int Datatype::copy(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount,
320 MPI_Datatype recvtype)
322 // FIXME Handle the case of a partial shared malloc.
324 smpi_switch_data_segment(simgrid::s4u::Actor::self());
326 /* First check if we really have something to do */
328 std::vector<std::pair<size_t, size_t>> private_blocks;
329 if(smpi_is_shared(sendbuf,private_blocks,&offset)
330 && (private_blocks.size()==1
331 && (private_blocks[0].second - private_blocks[0].first)==(unsigned long)(sendcount * sendtype->get_extent()))){
332 XBT_VERB("sendbuf is shared. Ignoring copies");
335 if(smpi_is_shared(recvbuf,private_blocks,&offset)
336 && (private_blocks.size()==1
337 && (private_blocks[0].second - private_blocks[0].first)==(unsigned long)(recvcount * recvtype->get_extent()))){
338 XBT_VERB("recvbuf is shared. Ignoring copies");
342 if (recvcount > 0 && recvbuf != sendbuf) {
343 sendcount *= sendtype->size();
344 recvcount *= recvtype->size();
345 int count = sendcount < recvcount ? sendcount : recvcount;
346 XBT_DEBUG("Copying %d bytes from %p to %p", count, sendbuf, recvbuf);
347 if (not(sendtype->flags() & DT_FLAG_DERIVED) && not(recvtype->flags() & DT_FLAG_DERIVED)) {
348 if (not smpi_process()->replaying() && count > 0)
349 memcpy(recvbuf, sendbuf, count);
350 } else if (not(sendtype->flags() & DT_FLAG_DERIVED)) {
351 recvtype->unserialize(sendbuf, recvbuf, count / recvtype->size(), MPI_REPLACE);
352 } else if (not(recvtype->flags() & DT_FLAG_DERIVED)) {
353 sendtype->serialize(sendbuf, recvbuf, count / sendtype->size());
354 } else if(sendtype->size() != 0 && recvtype->size() != 0){
355 void * buf_tmp = xbt_malloc(count);
356 sendtype->serialize( sendbuf, buf_tmp,count/sendtype->size());
357 recvtype->unserialize( buf_tmp, recvbuf,count/recvtype->size(), MPI_REPLACE);
362 return sendcount > recvcount ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
365 //Default serialization method : memcpy.
366 void Datatype::serialize(const void* noncontiguous_buf, void* contiguous_buf, int count)
368 auto* contiguous_buf_char = static_cast<char*>(contiguous_buf);
369 const auto* noncontiguous_buf_char = static_cast<const char*>(noncontiguous_buf) + lb_;
370 memcpy(contiguous_buf_char, noncontiguous_buf_char, count*size_);
373 void Datatype::unserialize(const void* contiguous_buf, void *noncontiguous_buf, int count, MPI_Op op){
374 const auto* contiguous_buf_char = static_cast<const char*>(contiguous_buf);
375 auto* noncontiguous_buf_char = static_cast<char*>(noncontiguous_buf) + lb_;
378 op->apply( contiguous_buf_char, noncontiguous_buf_char, &n, this);
381 int Datatype::create_contiguous(int count, MPI_Datatype old_type, MPI_Aint lb, MPI_Datatype* new_type){
382 if(old_type->flags_ & DT_FLAG_DERIVED){
383 //handle this case as a hvector with stride equals to the extent of the datatype
384 return create_hvector(count, 1, old_type->get_extent(), old_type, new_type);
387 *new_type = new Type_Contiguous(count * old_type->size(), lb, lb + count * old_type->size(),
388 DT_FLAG_DERIVED, count, old_type);
390 *new_type = new Datatype(count * old_type->size(), lb, lb + count * old_type->size(),0);
394 int Datatype::create_vector(int count, int block_length, int stride, MPI_Datatype old_type, MPI_Datatype* new_type)
403 ub=((count-1)*stride+block_length-1)*old_type->get_extent()+old_type->ub();
405 if(old_type->flags() & DT_FLAG_DERIVED || stride != block_length){
406 *new_type = new Type_Vector(old_type->size() * block_length * count, lb, ub, DT_FLAG_DERIVED, count, block_length,
410 /* in this situation the data are contiguous thus it's not required to serialize and unserialize it*/
412 new Datatype(old_type->size() * block_length * count, 0,
413 old_type->size() * ((count - 1) * stride + block_length), DT_FLAG_CONTIGUOUS | DT_FLAG_DERIVED);
414 const std::array<int, 3> ints = {{count, block_length, stride}};
415 (*new_type)->set_contents(MPI_COMBINER_VECTOR, 3, ints.data(), 0, nullptr, 1, &old_type);
422 int Datatype::create_hvector(int count, int block_length, MPI_Aint stride, MPI_Datatype old_type, MPI_Datatype* new_type)
431 ub=((count-1)*stride)+(block_length-1)*old_type->get_extent()+old_type->ub();
433 if(old_type->flags() & DT_FLAG_DERIVED || stride != block_length*old_type->get_extent()){
434 *new_type = new Type_Hvector(old_type->size() * block_length * count, lb, ub, DT_FLAG_DERIVED, count, block_length,
438 /* in this situation the data are contiguous thus it's not required to serialize and unserialize it*/
439 *new_type = new Datatype(old_type->size() * block_length * count, 0, old_type->size() * block_length * count,
440 DT_FLAG_CONTIGUOUS | DT_FLAG_DERIVED);
441 const std::array<int, 2> ints = {{count, block_length}};
442 (*new_type)->set_contents(MPI_COMBINER_HVECTOR, 2, ints.data(), 1, &stride, 1, &old_type);
448 int Datatype::create_indexed(int count, const int* block_lengths, const int* indices, MPI_Datatype old_type, MPI_Datatype* new_type){
450 bool contiguous=true;
454 lb=indices[0]*old_type->get_extent();
455 ub=indices[0]*old_type->get_extent() + block_lengths[0]*old_type->ub();
458 for (int i = 0; i < count; i++) {
459 if (block_lengths[i] < 0)
461 size += block_lengths[i];
463 if(indices[i]*old_type->get_extent()+old_type->lb()<lb)
464 lb = indices[i]*old_type->get_extent()+old_type->lb();
465 if(indices[i]*old_type->get_extent()+block_lengths[i]*old_type->ub()>ub)
466 ub = indices[i]*old_type->get_extent()+block_lengths[i]*old_type->ub();
468 if ( (i< count -1) && (indices[i]+block_lengths[i] != indices[i+1]) )
471 if(old_type->flags_ & DT_FLAG_DERIVED)
474 if (not contiguous) {
475 *new_type = new Type_Indexed(size * old_type->size(),lb,ub,
476 DT_FLAG_DERIVED|DT_FLAG_DATA, count, block_lengths, indices, old_type);
478 Datatype::create_contiguous(size, old_type, lb, new_type);
483 int Datatype::create_hindexed(int count, const int* block_lengths, const MPI_Aint* indices, MPI_Datatype old_type, MPI_Datatype* new_type){
485 bool contiguous=true;
489 lb=indices[0] + old_type->lb();
490 ub=indices[0] + block_lengths[0]*old_type->ub();
492 for (int i = 0; i < count; i++) {
493 if (block_lengths[i] < 0)
495 size += block_lengths[i];
497 if(indices[i]+old_type->lb()<lb)
498 lb = indices[i]+old_type->lb();
499 if(indices[i]+block_lengths[i]*old_type->ub()>ub)
500 ub = indices[i]+block_lengths[i]*old_type->ub();
502 if ((i < count - 1) && (indices[i] + static_cast<MPI_Aint>(old_type->size()) * block_lengths[i] != indices[i + 1]))
505 if (old_type->flags_ & DT_FLAG_DERIVED || lb!=0)
508 if (not contiguous) {
509 *new_type = new Type_Hindexed(size * old_type->size(),lb,ub,
510 DT_FLAG_DERIVED|DT_FLAG_DATA, count, block_lengths, indices, old_type);
512 Datatype::create_contiguous(size, old_type, lb, new_type);
517 int Datatype::create_struct(int count, const int* block_lengths, const MPI_Aint* indices, const MPI_Datatype* old_types, MPI_Datatype* new_type){
519 bool contiguous=true;
524 lb=indices[0] + old_types[0]->lb();
525 ub=indices[0] + block_lengths[0]*old_types[0]->ub();
527 bool forced_lb=false;
528 bool forced_ub=false;
529 for (int i = 0; i < count; i++) {
530 if (block_lengths[i]<0)
532 if (old_types[i]->flags_ & DT_FLAG_DERIVED)
535 size += block_lengths[i]*old_types[i]->size();
536 if (old_types[i]==MPI_LB){
540 if (old_types[i]==MPI_UB){
545 if (not forced_lb && indices[i] + old_types[i]->lb() < lb)
547 if (not forced_ub && indices[i] + block_lengths[i] * old_types[i]->ub() > ub)
548 ub = indices[i]+block_lengths[i]*old_types[i]->ub();
550 if ((i < count - 1) &&
551 (indices[i] + static_cast<MPI_Aint>(old_types[i]->size() * block_lengths[i]) != indices[i + 1]))
554 if (not contiguous) {
555 *new_type = new Type_Struct(size, lb,ub, DT_FLAG_DERIVED|DT_FLAG_DATA,
556 count, block_lengths, indices, old_types);
558 Datatype::create_contiguous(size, MPI_CHAR, lb, new_type);
563 int Datatype::create_subarray(int ndims, const int* array_of_sizes,
564 const int* array_of_subsizes, const int* array_of_starts,
565 int order, MPI_Datatype oldtype, MPI_Datatype *newtype){
568 for (int i = 0; i < ndims; i++) {
569 if (array_of_subsizes[i] > array_of_sizes[i]){
570 XBT_WARN("subarray : array_of_subsizes > array_of_sizes for dim %d",i);
573 if (array_of_starts[i] + array_of_subsizes[i] > array_of_sizes[i]){
574 XBT_WARN("subarray : array_of_starts + array_of_subsizes > array_of_sizes for dim %d",i);
579 MPI_Aint extent = oldtype->get_extent();
584 if( order==MPI_ORDER_C ) {
594 MPI_Aint size = (MPI_Aint)array_of_sizes[i] * (MPI_Aint)array_of_sizes[i+step];
595 MPI_Aint lb = (MPI_Aint)array_of_starts[i] + (MPI_Aint)array_of_starts[i+step] *(MPI_Aint)array_of_sizes[i];
597 create_vector( array_of_subsizes[i+step], array_of_subsizes[i], array_of_sizes[i],
602 for( i += 2 * step; i != end; i += step ) {
603 create_hvector( array_of_subsizes[i], 1, size * extent,
606 lb += size * array_of_starts[i];
607 size *= array_of_sizes[i];
611 const MPI_Aint lbs = lb * extent;
613 //handle LB and UB with a resized call
614 create_hindexed(1, &sizes, &lbs, tmp, newtype);
618 create_resized(tmp, 0, extent, newtype);
624 int Datatype::create_resized(MPI_Datatype oldtype,MPI_Aint lb, MPI_Aint extent, MPI_Datatype *newtype){
625 const std::array<int, 3> blocks = {{1, 1, 1}};
626 const std::array<MPI_Aint, 3> disps = {{lb, 0, lb + extent}};
627 const std::array<MPI_Datatype, 3> types = {{MPI_LB, oldtype, MPI_UB}};
629 *newtype = new simgrid::smpi::Type_Struct(oldtype->size(), lb, lb + extent, DT_FLAG_DERIVED, 3, blocks.data(),
630 disps.data(), types.data());
632 (*newtype)->addflag(~DT_FLAG_COMMITED);
636 Datatype* Datatype::f2c(int id)
638 return static_cast<Datatype*>(F2C::f2c(id));
641 } // namespace simgrid::smpi