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)
121 MC_ignore(&refcount_, sizeof refcount_);
125 // for predefined types, so refcount_ = 0.
126 Datatype::Datatype(const char* name, int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags)
127 : name_(name), id(std::to_string(ident)), size_(size), lb_(lb), ub_(ub), flags_(flags), refcount_(0)
129 id2type_lookup.try_emplace(id, this);
132 MC_ignore(&refcount_, sizeof refcount_);
136 Datatype::Datatype(Datatype* datatype, int* ret)
137 : size_(datatype->size_), lb_(datatype->lb_), ub_(datatype->ub_), flags_(datatype->flags_), duplicated_datatype_(datatype)
141 *ret = this->copy_attrs(datatype);
144 Datatype::~Datatype()
146 xbt_assert(refcount_ >= 0);
148 if(flags_ & DT_FLAG_PREDEFINED)
150 //prevent further usage
151 flags_ &= ~ DT_FLAG_COMMITED;
152 if(duplicated_datatype_ != MPI_DATATYPE_NULL)
153 unref(duplicated_datatype_);
154 F2C::free_f(this->f2c_id());
155 //if still used, mark for deletion
157 flags_ |=DT_FLAG_DESTROYED;
160 cleanup_attr<Datatype>();
163 int Datatype::copy_attrs(Datatype* datatype){
164 flags_ &= ~DT_FLAG_PREDEFINED;
166 set_contents(MPI_COMBINER_DUP, 0, nullptr, 0, nullptr, 1, &datatype);
167 for (auto const& [key, value] : datatype->attributes()) {
168 auto elem_it = keyvals_.find(key);
169 xbt_assert(elem_it != keyvals_.end(), "Keyval not found for Datatype: %d", key);
171 smpi_key_elem& elem = elem_it->second;
172 int ret = MPI_SUCCESS;
174 void* value_out = nullptr;
175 if (elem.copy_fn.type_copy_fn == MPI_TYPE_DUP_FN) {
178 } else if (elem.copy_fn.type_copy_fn != MPI_NULL_COPY_FN) {
179 ret = elem.copy_fn.type_copy_fn(datatype, key, elem.extra_state, value, &value_out, &flag);
181 if (ret != MPI_SUCCESS)
184 if (elem.copy_fn.type_copy_fn_fort != MPI_NULL_COPY_FN) {
185 value_out = xbt_new(int, 1);
186 if (*(int*)*elem.copy_fn.type_copy_fn_fort == 1) { // MPI_TYPE_DUP_FN
187 memcpy(value_out, value, sizeof(int));
189 } else { // not null, nor dup
190 elem.copy_fn.type_copy_fn_fort(datatype, key, elem.extra_state, value, value_out, &flag, &ret);
192 if (ret != MPI_SUCCESS) {
199 attributes().try_emplace(key, value_out);
205 int Datatype::clone(MPI_Datatype* type){
207 *type = new Datatype(this, &ret);
217 MC_ignore(&refcount_, sizeof refcount_);
221 void Datatype::unref(MPI_Datatype datatype)
223 if (datatype->refcount_ > 0)
224 datatype->refcount_--;
228 MC_ignore(&datatype->refcount_, sizeof datatype->refcount_);
231 if (datatype->refcount_ == 0 && not(datatype->flags_ & DT_FLAG_PREDEFINED))
235 void Datatype::commit()
237 flags_ |= DT_FLAG_COMMITED;
240 bool Datatype::is_valid() const
242 return (flags_ & DT_FLAG_COMMITED);
245 bool Datatype::is_basic() const
247 return (flags_ & DT_FLAG_BASIC);
250 MPI_Datatype Datatype::decode(const std::string& datatype_id)
252 return id2type_lookup.find(datatype_id)->second;
255 void Datatype::addflag(int flag){
259 int Datatype::extent(MPI_Aint* lb, MPI_Aint* extent) const
266 void Datatype::get_name(char* name, int* length) const
268 *length = static_cast<int>(name_.length());
269 if (not name_.empty()) {
270 name_.copy(name, *length);
271 name[*length] = '\0';
275 void Datatype::set_name(const char* name)
280 int Datatype::pack(const void* inbuf, int incount, void* outbuf, int outcount, int* position, const Comm*)
282 if (outcount - *position < incount*static_cast<int>(size_))
283 return MPI_ERR_OTHER;
284 Datatype::copy(inbuf, incount, this, static_cast<char*>(outbuf) + *position, outcount, MPI_CHAR);
285 *position += incount * size_;
289 int Datatype::unpack(const void* inbuf, int insize, int* position, void* outbuf, int outcount, const Comm*)
291 if (outcount*static_cast<int>(size_)> insize)
292 return MPI_ERR_OTHER;
293 Datatype::copy(static_cast<const char*>(inbuf) + *position, insize, MPI_CHAR, outbuf, outcount, this);
294 *position += outcount * size_;
298 int Datatype::get_contents(int max_integers, int max_addresses, int max_datatypes, int* array_of_integers,
299 MPI_Aint* array_of_addresses, MPI_Datatype* array_of_datatypes) const
301 if(contents_==nullptr)
303 if (static_cast<unsigned>(max_integers) < contents_->integers_.size())
304 return MPI_ERR_COUNT;
305 std::copy(begin(contents_->integers_), end(contents_->integers_), array_of_integers);
306 if (static_cast<unsigned>(max_addresses) < contents_->addresses_.size())
307 return MPI_ERR_COUNT;
308 std::copy(begin(contents_->addresses_), end(contents_->addresses_), array_of_addresses);
309 if (static_cast<unsigned>(max_datatypes) < contents_->datatypes_.size())
310 return MPI_ERR_COUNT;
311 std::copy(begin(contents_->datatypes_), end(contents_->datatypes_), array_of_datatypes);
312 for (auto& datatype : contents_->datatypes_)
317 int Datatype::get_envelope(int* num_integers, int* num_addresses, int* num_datatypes, int* combiner) const
319 if(contents_==nullptr){
323 *combiner = MPI_COMBINER_NAMED;
325 *num_integers = contents_->integers_.size();
326 *num_addresses = contents_->addresses_.size();
327 *num_datatypes = contents_->datatypes_.size();
328 *combiner = contents_->combiner_;
333 int Datatype::copy(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount,
334 MPI_Datatype recvtype)
336 // FIXME Handle the case of a partial shared malloc.
338 smpi_switch_data_segment(simgrid::s4u::Actor::self());
340 /* First check if we really have something to do */
342 std::vector<std::pair<size_t, size_t>> private_blocks;
343 if(smpi_is_shared(sendbuf,private_blocks,&offset)
344 && (private_blocks.size()==1
345 && (private_blocks[0].second - private_blocks[0].first)==(unsigned long)(sendcount * sendtype->get_extent()))){
346 XBT_VERB("sendbuf is shared. Ignoring copies");
349 if(smpi_is_shared(recvbuf,private_blocks,&offset)
350 && (private_blocks.size()==1
351 && (private_blocks[0].second - private_blocks[0].first)==(unsigned long)(recvcount * recvtype->get_extent()))){
352 XBT_VERB("recvbuf is shared. Ignoring copies");
356 if (recvcount > 0 && recvbuf != sendbuf) {
357 sendcount *= sendtype->size();
358 recvcount *= recvtype->size();
359 int count = sendcount < recvcount ? sendcount : recvcount;
360 XBT_DEBUG("Copying %d bytes from %p to %p", count, sendbuf, recvbuf);
361 if (not(sendtype->flags() & DT_FLAG_DERIVED) && not(recvtype->flags() & DT_FLAG_DERIVED)) {
362 if (not smpi_process()->replaying() && count > 0)
363 memcpy(recvbuf, sendbuf, count);
364 } else if (not(sendtype->flags() & DT_FLAG_DERIVED)) {
365 recvtype->unserialize(sendbuf, recvbuf, count / recvtype->size(), MPI_REPLACE);
366 } else if (not(recvtype->flags() & DT_FLAG_DERIVED)) {
367 sendtype->serialize(sendbuf, recvbuf, count / sendtype->size());
368 } else if(sendtype->size() != 0 && recvtype->size() != 0){
369 void * buf_tmp = xbt_malloc(count);
370 sendtype->serialize( sendbuf, buf_tmp,count/sendtype->size());
371 recvtype->unserialize( buf_tmp, recvbuf,count/recvtype->size(), MPI_REPLACE);
376 return sendcount > recvcount ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
379 //Default serialization method : memcpy.
380 void Datatype::serialize(const void* noncontiguous_buf, void* contiguous_buf, int count)
382 auto* contiguous_buf_char = static_cast<char*>(contiguous_buf);
383 const auto* noncontiguous_buf_char = static_cast<const char*>(noncontiguous_buf) + lb_;
384 memcpy(contiguous_buf_char, noncontiguous_buf_char, count*size_);
387 void Datatype::unserialize(const void* contiguous_buf, void *noncontiguous_buf, int count, MPI_Op op){
388 const auto* contiguous_buf_char = static_cast<const char*>(contiguous_buf);
389 auto* noncontiguous_buf_char = static_cast<char*>(noncontiguous_buf) + lb_;
392 op->apply( contiguous_buf_char, noncontiguous_buf_char, &n, this);
395 int Datatype::create_contiguous(int count, MPI_Datatype old_type, MPI_Aint lb, MPI_Datatype* new_type){
396 if(old_type->flags_ & DT_FLAG_DERIVED){
397 //handle this case as a hvector with stride equals to the extent of the datatype
398 return create_hvector(count, 1, old_type->get_extent(), old_type, new_type);
401 *new_type = new Type_Contiguous(count * old_type->size(), lb, lb + count * old_type->size(),
402 DT_FLAG_DERIVED, count, old_type);
404 *new_type = new Datatype(count * old_type->size(), lb, lb + count * old_type->size(),0);
408 int Datatype::create_vector(int count, int block_length, int stride, MPI_Datatype old_type, MPI_Datatype* new_type)
417 ub=((count-1)*stride+block_length-1)*old_type->get_extent()+old_type->ub();
419 if(old_type->flags() & DT_FLAG_DERIVED || stride != block_length){
420 *new_type = new Type_Vector(old_type->size() * block_length * count, lb, ub, DT_FLAG_DERIVED, count, block_length,
424 /* in this situation the data are contiguous thus it's not required to serialize and unserialize it*/
426 new Datatype(old_type->size() * block_length * count, 0,
427 old_type->size() * ((count - 1) * stride + block_length), DT_FLAG_CONTIGUOUS | DT_FLAG_DERIVED);
428 const std::array<int, 3> ints = {{count, block_length, stride}};
429 (*new_type)->set_contents(MPI_COMBINER_VECTOR, 3, ints.data(), 0, nullptr, 1, &old_type);
436 int Datatype::create_hvector(int count, int block_length, MPI_Aint stride, MPI_Datatype old_type, MPI_Datatype* new_type)
445 ub=((count-1)*stride)+(block_length-1)*old_type->get_extent()+old_type->ub();
447 if(old_type->flags() & DT_FLAG_DERIVED || stride != block_length*old_type->get_extent()){
448 *new_type = new Type_Hvector(old_type->size() * block_length * count, lb, ub, DT_FLAG_DERIVED, count, block_length,
452 /* in this situation the data are contiguous thus it's not required to serialize and unserialize it*/
453 *new_type = new Datatype(old_type->size() * block_length * count, 0, old_type->size() * block_length * count,
454 DT_FLAG_CONTIGUOUS | DT_FLAG_DERIVED);
455 const std::array<int, 2> ints = {{count, block_length}};
456 (*new_type)->set_contents(MPI_COMBINER_HVECTOR, 2, ints.data(), 1, &stride, 1, &old_type);
462 int Datatype::create_indexed(int count, const int* block_lengths, const int* indices, MPI_Datatype old_type, MPI_Datatype* new_type){
464 bool contiguous=true;
468 lb=indices[0]*old_type->get_extent();
469 ub=indices[0]*old_type->get_extent() + block_lengths[0]*old_type->ub();
472 for (int i = 0; i < count; i++) {
473 if (block_lengths[i] < 0)
475 size += block_lengths[i];
477 if(indices[i]*old_type->get_extent()+old_type->lb()<lb)
478 lb = indices[i]*old_type->get_extent()+old_type->lb();
479 if(indices[i]*old_type->get_extent()+block_lengths[i]*old_type->ub()>ub)
480 ub = indices[i]*old_type->get_extent()+block_lengths[i]*old_type->ub();
482 if ( (i< count -1) && (indices[i]+block_lengths[i] != indices[i+1]) )
485 if(old_type->flags_ & DT_FLAG_DERIVED)
488 if (not contiguous) {
489 *new_type = new Type_Indexed(size * old_type->size(),lb,ub,
490 DT_FLAG_DERIVED|DT_FLAG_DATA, count, block_lengths, indices, old_type);
492 Datatype::create_contiguous(size, old_type, lb, new_type);
497 int Datatype::create_hindexed(int count, const int* block_lengths, const MPI_Aint* indices, MPI_Datatype old_type, MPI_Datatype* new_type){
499 bool contiguous=true;
503 lb=indices[0] + old_type->lb();
504 ub=indices[0] + block_lengths[0]*old_type->ub();
506 for (int i = 0; i < count; i++) {
507 if (block_lengths[i] < 0)
509 size += block_lengths[i];
511 if(indices[i]+old_type->lb()<lb)
512 lb = indices[i]+old_type->lb();
513 if(indices[i]+block_lengths[i]*old_type->ub()>ub)
514 ub = indices[i]+block_lengths[i]*old_type->ub();
516 if ((i < count - 1) && (indices[i] + static_cast<MPI_Aint>(old_type->size()) * block_lengths[i] != indices[i + 1]))
519 if (old_type->flags_ & DT_FLAG_DERIVED || lb!=0)
522 if (not contiguous) {
523 *new_type = new Type_Hindexed(size * old_type->size(),lb,ub,
524 DT_FLAG_DERIVED|DT_FLAG_DATA, count, block_lengths, indices, old_type);
526 Datatype::create_contiguous(size, old_type, lb, new_type);
531 int Datatype::create_struct(int count, const int* block_lengths, const MPI_Aint* indices, const MPI_Datatype* old_types, MPI_Datatype* new_type){
533 bool contiguous=true;
538 lb=indices[0] + old_types[0]->lb();
539 ub=indices[0] + block_lengths[0]*old_types[0]->ub();
541 bool forced_lb=false;
542 bool forced_ub=false;
543 for (int i = 0; i < count; i++) {
544 if (block_lengths[i]<0)
546 if (old_types[i]->flags_ & DT_FLAG_DERIVED)
549 size += block_lengths[i]*old_types[i]->size();
550 if (old_types[i]==MPI_LB){
554 if (old_types[i]==MPI_UB){
559 if (not forced_lb && indices[i] + old_types[i]->lb() < lb)
561 if (not forced_ub && indices[i] + block_lengths[i] * old_types[i]->ub() > ub)
562 ub = indices[i]+block_lengths[i]*old_types[i]->ub();
564 if ((i < count - 1) &&
565 (indices[i] + static_cast<MPI_Aint>(old_types[i]->size() * block_lengths[i]) != indices[i + 1]))
568 if (not contiguous) {
569 *new_type = new Type_Struct(size, lb,ub, DT_FLAG_DERIVED|DT_FLAG_DATA,
570 count, block_lengths, indices, old_types);
572 Datatype::create_contiguous(size, MPI_CHAR, lb, new_type);
577 int Datatype::create_subarray(int ndims, const int* array_of_sizes,
578 const int* array_of_subsizes, const int* array_of_starts,
579 int order, MPI_Datatype oldtype, MPI_Datatype *newtype){
582 for (int i = 0; i < ndims; i++) {
583 if (array_of_subsizes[i] > array_of_sizes[i]){
584 XBT_WARN("subarray : array_of_subsizes > array_of_sizes for dim %d",i);
587 if (array_of_starts[i] + array_of_subsizes[i] > array_of_sizes[i]){
588 XBT_WARN("subarray : array_of_starts + array_of_subsizes > array_of_sizes for dim %d",i);
593 MPI_Aint extent = oldtype->get_extent();
598 if( order==MPI_ORDER_C ) {
608 MPI_Aint size = (MPI_Aint)array_of_sizes[i] * (MPI_Aint)array_of_sizes[i+step];
609 MPI_Aint lb = (MPI_Aint)array_of_starts[i] + (MPI_Aint)array_of_starts[i+step] *(MPI_Aint)array_of_sizes[i];
611 create_vector( array_of_subsizes[i+step], array_of_subsizes[i], array_of_sizes[i],
616 for( i += 2 * step; i != end; i += step ) {
617 create_hvector( array_of_subsizes[i], 1, size * extent,
620 lb += size * array_of_starts[i];
621 size *= array_of_sizes[i];
625 const MPI_Aint lbs = lb * extent;
627 //handle LB and UB with a resized call
628 create_hindexed(1, &sizes, &lbs, tmp, newtype);
632 create_resized(tmp, 0, extent, newtype);
638 int Datatype::create_resized(MPI_Datatype oldtype,MPI_Aint lb, MPI_Aint extent, MPI_Datatype *newtype){
639 const std::array<int, 3> blocks = {{1, 1, 1}};
640 const std::array<MPI_Aint, 3> disps = {{lb, 0, lb + extent}};
641 const std::array<MPI_Datatype, 3> types = {{MPI_LB, oldtype, MPI_UB}};
643 *newtype = new simgrid::smpi::Type_Struct(oldtype->size(), lb, lb + extent, DT_FLAG_DERIVED, 3, blocks.data(),
644 disps.data(), types.data());
646 (*newtype)->addflag(~DT_FLAG_COMMITED);
650 Datatype* Datatype::f2c(int id)
652 return static_cast<Datatype*>(F2C::f2c(id));
655 } // namespace simgrid::smpi