1 /* smpi_datatype.cpp -- MPI primitives to handle datatypes */
2 /* Copyright (c) 2009-2021. 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;
111 std::unordered_map<int, smpi_key_elem> Datatype::keyvals_; // required by the Keyval class implementation
112 int Datatype::keyval_id_=0; // required by the Keyval class implementation
113 Datatype::Datatype(int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags) : Datatype(size, lb, ub, flags)
115 id = std::to_string(ident);
118 Datatype::Datatype(int size, MPI_Aint lb, MPI_Aint ub, int flags) : size_(size), lb_(lb), ub_(ub), flags_(flags)
123 MC_ignore(&refcount_, sizeof refcount_);
127 // for predefined types, so refcount_ = 0.
128 Datatype::Datatype(const char* name, int ident, int size, MPI_Aint lb, MPI_Aint ub, int flags)
129 : name_(name), id(std::to_string(ident)), size_(size), lb_(lb), ub_(ub), flags_(flags), refcount_(0)
131 id2type_lookup.insert({id, this});
134 MC_ignore(&refcount_, sizeof refcount_);
138 Datatype::Datatype(Datatype* datatype, int* ret)
139 : size_(datatype->size_), lb_(datatype->lb_), ub_(datatype->ub_), flags_(datatype->flags_), duplicated_datatype_(datatype)
143 *ret = this->copy_attrs(datatype);
146 Datatype::~Datatype()
148 xbt_assert(refcount_ >= 0);
150 if(flags_ & DT_FLAG_PREDEFINED)
152 //prevent further usage
153 flags_ &= ~ DT_FLAG_COMMITED;
154 if(duplicated_datatype_ != MPI_DATATYPE_NULL)
155 unref(duplicated_datatype_);
156 F2C::free_f(this->f2c_id());
157 //if still used, mark for deletion
159 flags_ |=DT_FLAG_DESTROYED;
162 cleanup_attr<Datatype>();
165 int Datatype::copy_attrs(Datatype* datatype){
166 flags_ &= ~DT_FLAG_PREDEFINED;
168 set_contents(MPI_COMBINER_DUP, 0, nullptr, 0, nullptr, 1, &datatype);
169 for (auto const& it : datatype->attributes()) {
170 auto elem_it = keyvals_.find(it.first);
171 xbt_assert(elem_it != keyvals_.end(), "Keyval not found for Datatype: %d", it.first);
173 smpi_key_elem& elem = elem_it->second;
174 int ret = MPI_SUCCESS;
176 void* value_out = nullptr;
177 if (elem.copy_fn.type_copy_fn == MPI_TYPE_DUP_FN) {
178 value_out = it.second;
180 } else if (elem.copy_fn.type_copy_fn != MPI_NULL_COPY_FN) {
181 ret = elem.copy_fn.type_copy_fn(datatype, it.first, elem.extra_state, it.second, &value_out, &flag);
183 if (ret != MPI_SUCCESS)
186 if (elem.copy_fn.type_copy_fn_fort != MPI_NULL_COPY_FN) {
187 value_out = xbt_new(int, 1);
188 if (*(int*)*elem.copy_fn.type_copy_fn_fort == 1) { // MPI_TYPE_DUP_FN
189 memcpy(value_out, it.second, sizeof(int));
191 } else { // not null, nor dup
192 elem.copy_fn.type_copy_fn_fort(datatype, it.first, elem.extra_state, it.second, value_out, &flag, &ret);
194 if (ret != MPI_SUCCESS) {
201 attributes().emplace(it.first, value_out);
207 int Datatype::clone(MPI_Datatype* type){
209 *type = new Datatype(this, &ret);
219 MC_ignore(&refcount_, sizeof refcount_);
223 void Datatype::unref(MPI_Datatype datatype)
225 if (datatype->refcount_ > 0)
226 datatype->refcount_--;
230 MC_ignore(&datatype->refcount_, sizeof datatype->refcount_);
233 if (datatype->refcount_ == 0 && not(datatype->flags_ & DT_FLAG_PREDEFINED))
237 void Datatype::commit()
239 flags_ |= DT_FLAG_COMMITED;
242 bool Datatype::is_valid() const
244 return (flags_ & DT_FLAG_COMMITED);
247 bool Datatype::is_basic() const
249 return (flags_ & DT_FLAG_BASIC);
252 MPI_Datatype Datatype::decode(const std::string& datatype_id)
254 return id2type_lookup.find(datatype_id)->second;
257 void Datatype::addflag(int flag){
261 int Datatype::extent(MPI_Aint* lb, MPI_Aint* extent) const
268 void Datatype::get_name(char* name, int* length) const
270 *length = static_cast<int>(name_.length());
271 if (not name_.empty()) {
272 name_.copy(name, *length);
273 name[*length] = '\0';
277 void Datatype::set_name(const char* name)
282 int Datatype::pack(const void* inbuf, int incount, void* outbuf, int outcount, int* position, const Comm*)
284 if (outcount - *position < incount*static_cast<int>(size_))
285 return MPI_ERR_OTHER;
286 Datatype::copy(inbuf, incount, this, static_cast<char*>(outbuf) + *position, outcount, MPI_CHAR);
287 *position += incount * size_;
291 int Datatype::unpack(const void* inbuf, int insize, int* position, void* outbuf, int outcount, const Comm*)
293 if (outcount*static_cast<int>(size_)> insize)
294 return MPI_ERR_OTHER;
295 Datatype::copy(static_cast<const char*>(inbuf) + *position, insize, MPI_CHAR, outbuf, outcount, this);
296 *position += outcount * size_;
300 int Datatype::get_contents(int max_integers, int max_addresses, int max_datatypes, int* array_of_integers,
301 MPI_Aint* array_of_addresses, MPI_Datatype* array_of_datatypes) const
303 if(contents_==nullptr)
305 if (static_cast<unsigned>(max_integers) < contents_->integers_.size())
306 return MPI_ERR_COUNT;
307 std::copy(begin(contents_->integers_), end(contents_->integers_), array_of_integers);
308 if (static_cast<unsigned>(max_addresses) < contents_->addresses_.size())
309 return MPI_ERR_COUNT;
310 std::copy(begin(contents_->addresses_), end(contents_->addresses_), array_of_addresses);
311 if (static_cast<unsigned>(max_datatypes) < contents_->datatypes_.size())
312 return MPI_ERR_COUNT;
313 std::copy(begin(contents_->datatypes_), end(contents_->datatypes_), array_of_datatypes);
314 for (auto& datatype : contents_->datatypes_)
319 int Datatype::get_envelope(int* num_integers, int* num_addresses, int* num_datatypes, int* combiner) const
321 if(contents_==nullptr){
325 *combiner = MPI_COMBINER_NAMED;
327 *num_integers = contents_->integers_.size();
328 *num_addresses = contents_->addresses_.size();
329 *num_datatypes = contents_->datatypes_.size();
330 *combiner = contents_->combiner_;
335 int Datatype::copy(const void* sendbuf, int sendcount, MPI_Datatype sendtype, void* recvbuf, int recvcount,
336 MPI_Datatype recvtype)
338 // FIXME Handle the case of a partial shared malloc.
340 smpi_switch_data_segment(simgrid::s4u::Actor::self());
342 /* First check if we really have something to do */
344 std::vector<std::pair<size_t, size_t>> private_blocks;
345 if(smpi_is_shared(sendbuf,private_blocks,&offset)
346 && (private_blocks.size()==1
347 && (private_blocks[0].second - private_blocks[0].first)==(unsigned long)(sendcount * sendtype->get_extent()))){
348 XBT_VERB("sendbuf is shared. Ignoring copies");
351 if(smpi_is_shared(recvbuf,private_blocks,&offset)
352 && (private_blocks.size()==1
353 && (private_blocks[0].second - private_blocks[0].first)==(unsigned long)(recvcount * recvtype->get_extent()))){
354 XBT_VERB("recvbuf is shared. Ignoring copies");
358 if (recvcount > 0 && recvbuf != sendbuf) {
359 sendcount *= sendtype->size();
360 recvcount *= recvtype->size();
361 int count = sendcount < recvcount ? sendcount : recvcount;
362 XBT_DEBUG("Copying %d bytes from %p to %p", count, sendbuf, recvbuf);
363 if (not(sendtype->flags() & DT_FLAG_DERIVED) && not(recvtype->flags() & DT_FLAG_DERIVED)) {
364 if (not smpi_process()->replaying() && count > 0)
365 memcpy(recvbuf, sendbuf, count);
366 } else if (not(sendtype->flags() & DT_FLAG_DERIVED)) {
367 recvtype->unserialize(sendbuf, recvbuf, count / recvtype->size(), MPI_REPLACE);
368 } else if (not(recvtype->flags() & DT_FLAG_DERIVED)) {
369 sendtype->serialize(sendbuf, recvbuf, count / sendtype->size());
370 } else if(sendtype->size() != 0 && recvtype->size() != 0){
371 void * buf_tmp = xbt_malloc(count);
372 sendtype->serialize( sendbuf, buf_tmp,count/sendtype->size());
373 recvtype->unserialize( buf_tmp, recvbuf,count/recvtype->size(), MPI_REPLACE);
378 return sendcount > recvcount ? MPI_ERR_TRUNCATE : MPI_SUCCESS;
381 //Default serialization method : memcpy.
382 void Datatype::serialize(const void* noncontiguous_buf, void* contiguous_buf, int count)
384 auto* contiguous_buf_char = static_cast<char*>(contiguous_buf);
385 const auto* noncontiguous_buf_char = static_cast<const char*>(noncontiguous_buf) + lb_;
386 memcpy(contiguous_buf_char, noncontiguous_buf_char, count*size_);
389 void Datatype::unserialize(const void* contiguous_buf, void *noncontiguous_buf, int count, MPI_Op op){
390 const auto* contiguous_buf_char = static_cast<const char*>(contiguous_buf);
391 auto* noncontiguous_buf_char = static_cast<char*>(noncontiguous_buf) + lb_;
394 op->apply( contiguous_buf_char, noncontiguous_buf_char, &n, this);
397 int Datatype::create_contiguous(int count, MPI_Datatype old_type, MPI_Aint lb, MPI_Datatype* new_type){
398 if(old_type->flags_ & DT_FLAG_DERIVED){
399 //handle this case as a hvector with stride equals to the extent of the datatype
400 return create_hvector(count, 1, old_type->get_extent(), old_type, new_type);
403 *new_type = new Type_Contiguous(count * old_type->size(), lb, lb + count * old_type->size(),
404 DT_FLAG_DERIVED, count, old_type);
406 *new_type = new Datatype(count * old_type->size(), lb, lb + count * old_type->size(),0);
410 int Datatype::create_vector(int count, int block_length, int stride, MPI_Datatype old_type, MPI_Datatype* new_type)
419 ub=((count-1)*stride+block_length-1)*old_type->get_extent()+old_type->ub();
421 if(old_type->flags() & DT_FLAG_DERIVED || stride != block_length){
422 *new_type = new Type_Vector(old_type->size() * block_length * count, lb, ub, DT_FLAG_DERIVED, count, block_length,
426 /* in this situation the data are contiguous thus it's not required to serialize and unserialize it*/
428 new Datatype(old_type->size() * block_length * count, 0,
429 old_type->size() * ((count - 1) * stride + block_length), DT_FLAG_CONTIGUOUS | DT_FLAG_DERIVED);
430 const std::array<int, 3> ints = {{count, block_length, stride}};
431 (*new_type)->set_contents(MPI_COMBINER_VECTOR, 3, ints.data(), 0, nullptr, 1, &old_type);
438 int Datatype::create_hvector(int count, int block_length, MPI_Aint stride, MPI_Datatype old_type, MPI_Datatype* new_type)
447 ub=((count-1)*stride)+(block_length-1)*old_type->get_extent()+old_type->ub();
449 if(old_type->flags() & DT_FLAG_DERIVED || stride != block_length*old_type->get_extent()){
450 *new_type = new Type_Hvector(old_type->size() * block_length * count, lb, ub, DT_FLAG_DERIVED, count, block_length,
454 /* in this situation the data are contiguous thus it's not required to serialize and unserialize it*/
455 *new_type = new Datatype(old_type->size() * block_length * count, 0, old_type->size() * block_length * count,
456 DT_FLAG_CONTIGUOUS | DT_FLAG_DERIVED);
457 const std::array<int, 2> ints = {{count, block_length}};
458 (*new_type)->set_contents(MPI_COMBINER_HVECTOR, 2, ints.data(), 1, &stride, 1, &old_type);
464 int Datatype::create_indexed(int count, const int* block_lengths, const int* indices, MPI_Datatype old_type, MPI_Datatype* new_type){
466 bool contiguous=true;
470 lb=indices[0]*old_type->get_extent();
471 ub=indices[0]*old_type->get_extent() + block_lengths[0]*old_type->ub();
474 for (int i = 0; i < count; i++) {
475 if (block_lengths[i] < 0)
477 size += block_lengths[i];
479 if(indices[i]*old_type->get_extent()+old_type->lb()<lb)
480 lb = indices[i]*old_type->get_extent()+old_type->lb();
481 if(indices[i]*old_type->get_extent()+block_lengths[i]*old_type->ub()>ub)
482 ub = indices[i]*old_type->get_extent()+block_lengths[i]*old_type->ub();
484 if ( (i< count -1) && (indices[i]+block_lengths[i] != indices[i+1]) )
487 if(old_type->flags_ & DT_FLAG_DERIVED)
490 if (not contiguous) {
491 *new_type = new Type_Indexed(size * old_type->size(),lb,ub,
492 DT_FLAG_DERIVED|DT_FLAG_DATA, count, block_lengths, indices, old_type);
494 Datatype::create_contiguous(size, old_type, lb, new_type);
499 int Datatype::create_hindexed(int count, const int* block_lengths, const MPI_Aint* indices, MPI_Datatype old_type, MPI_Datatype* new_type){
501 bool contiguous=true;
505 lb=indices[0] + old_type->lb();
506 ub=indices[0] + block_lengths[0]*old_type->ub();
508 for (int i = 0; i < count; i++) {
509 if (block_lengths[i] < 0)
511 size += block_lengths[i];
513 if(indices[i]+old_type->lb()<lb)
514 lb = indices[i]+old_type->lb();
515 if(indices[i]+block_lengths[i]*old_type->ub()>ub)
516 ub = indices[i]+block_lengths[i]*old_type->ub();
518 if ((i < count - 1) && (indices[i] + static_cast<MPI_Aint>(old_type->size()) * block_lengths[i] != indices[i + 1]))
521 if (old_type->flags_ & DT_FLAG_DERIVED || lb!=0)
524 if (not contiguous) {
525 *new_type = new Type_Hindexed(size * old_type->size(),lb,ub,
526 DT_FLAG_DERIVED|DT_FLAG_DATA, count, block_lengths, indices, old_type);
528 Datatype::create_contiguous(size, old_type, lb, new_type);
533 int Datatype::create_struct(int count, const int* block_lengths, const MPI_Aint* indices, const MPI_Datatype* old_types, MPI_Datatype* new_type){
535 bool contiguous=true;
540 lb=indices[0] + old_types[0]->lb();
541 ub=indices[0] + block_lengths[0]*old_types[0]->ub();
543 bool forced_lb=false;
544 bool forced_ub=false;
545 for (int i = 0; i < count; i++) {
546 if (block_lengths[i]<0)
548 if (old_types[i]->flags_ & DT_FLAG_DERIVED)
551 size += block_lengths[i]*old_types[i]->size();
552 if (old_types[i]==MPI_LB){
556 if (old_types[i]==MPI_UB){
561 if (not forced_lb && indices[i] + old_types[i]->lb() < lb)
563 if (not forced_ub && indices[i] + block_lengths[i] * old_types[i]->ub() > ub)
564 ub = indices[i]+block_lengths[i]*old_types[i]->ub();
566 if ((i < count - 1) &&
567 (indices[i] + static_cast<MPI_Aint>(old_types[i]->size() * block_lengths[i]) != indices[i + 1]))
570 if (not contiguous) {
571 *new_type = new Type_Struct(size, lb,ub, DT_FLAG_DERIVED|DT_FLAG_DATA,
572 count, block_lengths, indices, old_types);
574 Datatype::create_contiguous(size, MPI_CHAR, lb, new_type);
579 int Datatype::create_subarray(int ndims, const int* array_of_sizes,
580 const int* array_of_subsizes, const int* array_of_starts,
581 int order, MPI_Datatype oldtype, MPI_Datatype *newtype){
584 for (int i = 0; i < ndims; i++) {
585 if (array_of_subsizes[i] > array_of_sizes[i]){
586 XBT_WARN("subarray : array_of_subsizes > array_of_sizes for dim %d",i);
589 if (array_of_starts[i] + array_of_subsizes[i] > array_of_sizes[i]){
590 XBT_WARN("subarray : array_of_starts + array_of_subsizes > array_of_sizes for dim %d",i);
595 MPI_Aint extent = oldtype->get_extent();
600 if( order==MPI_ORDER_C ) {
610 MPI_Aint size = (MPI_Aint)array_of_sizes[i] * (MPI_Aint)array_of_sizes[i+step];
611 MPI_Aint lb = (MPI_Aint)array_of_starts[i] + (MPI_Aint)array_of_starts[i+step] *(MPI_Aint)array_of_sizes[i];
613 create_vector( array_of_subsizes[i+step], array_of_subsizes[i], array_of_sizes[i],
618 for( i += 2 * step; i != end; i += step ) {
619 create_hvector( array_of_subsizes[i], 1, size * extent,
622 lb += size * array_of_starts[i];
623 size *= array_of_sizes[i];
627 const MPI_Aint lbs = lb * extent;
629 //handle LB and UB with a resized call
630 create_hindexed(1, &sizes, &lbs, tmp, newtype);
634 create_resized(tmp, 0, extent, newtype);
640 int Datatype::create_resized(MPI_Datatype oldtype,MPI_Aint lb, MPI_Aint extent, MPI_Datatype *newtype){
641 const std::array<int, 3> blocks = {{1, 1, 1}};
642 const std::array<MPI_Aint, 3> disps = {{lb, 0, lb + extent}};
643 const std::array<MPI_Datatype, 3> types = {{MPI_LB, oldtype, MPI_UB}};
645 *newtype = new simgrid::smpi::Type_Struct(oldtype->size(), lb, lb + extent, DT_FLAG_DERIVED, 3, blocks.data(),
646 disps.data(), types.data());
648 (*newtype)->addflag(~DT_FLAG_COMMITED);
652 Datatype* Datatype::f2c(int id)
654 return static_cast<Datatype*>(F2C::f2c(id));
658 } // namespace simgrid