VariableArray.cc

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2025 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
/*---------------------------------------------------------------------------*/
/* VariableArray.cc                                            (C) 2000-2025 */
/*                                                                           */
/* Variable tableau 1D.                                                      */
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
#include "arcane/utils/NotSupportedException.h"
#include "arcane/utils/ArgumentException.h"
#include "arcane/utils/FatalErrorException.h"
#include "arcane/utils/TraceInfo.h"
#include "arcane/utils/Ref.h"
#include "arcane/utils/MemoryAccessInfo.h"
#include "arcane/utils/MemoryAllocator.h"
 
#include "arcane/core/VariableDiff.h"
#include "arcane/core/VariableBuildInfo.h"
#include "arcane/core/VariableInfo.h"
#include "arcane/core/IApplication.h"
#include "arcane/core/IVariableMng.h"
#include "arcane/core/IItemFamily.h"
#include "arcane/core/IVariableSynchronizer.h"
#include "arcane/core/IDataReader.h"
#include "arcane/core/ItemGroup.h"
#include "arcane/core/IDataFactoryMng.h"
#include "arcane/core/IParallelMng.h"
#include "arcane/core/IMesh.h"
#include "arcane/core/VariableComparer.h"
 
#include "arcane/core/datatype/DataTracer.h"
#include "arcane/core/datatype/DataTypeTraits.h"
#include "arcane/core/datatype/DataStorageBuildInfo.h"
 
#include "arcane/core/VariableArray.h"
#include "arcane/core/RawCopy.h"
 
#include "arcane/core/internal/IDataInternal.h"
#include "arcane/core/internal/IVariableMngInternal.h"
#include "arcane/core/internal/IVariableInternal.h"
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
namespace Arcane
{
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<class DataType>
class ArrayVariableDiff
: public VariableDiff<DataType>
{
  using VarDataTypeTraits = VariableDataTypeTraitsT<DataType>;
  using DiffInfo = typename VariableDiff<DataType>::DiffInfo;
  static constexpr bool IsNumeric = std::is_same_v<typename VarDataTypeTraits::IsNumeric, TrueType>;
  using NormType = typename VarDataTypeTraits::NormType;
 
 public:
 
  VariableComparerResults
  check(IVariable* var, ConstArrayView<DataType> ref, ConstArrayView<DataType> current,
        const VariableComparerArgs& compare_args)
  {
    const int max_print = compare_args.maxPrint();
    const bool compare_ghost = compare_args.isCompareGhost();
    if (var->itemKind() == IK_Unknown)
      return _checkAsArray(var, ref, current, compare_args);
 
    ItemGroup group = var->itemGroup();
    if (group.null())
      return {};
    IMesh* mesh = group.mesh();
    if (!mesh)
      return {};
    ITraceMng* msg = mesh->traceMng();
    IParallelMng* pm = mesh->parallelMng();
 
    GroupIndexTable* group_index_table = (var->isPartial()) ? group.localIdToIndex().get() : nullptr;
 
    int nb_diff = 0;
    bool compare_failed = false;
    eVariableComparerComputeDifferenceMethod diff_method = compare_args.computeDifferenceMethod();
    // Pas de norme max si le type n'est pas numérique.
    if (!IsNumeric)
      diff_method = eVariableComparerComputeDifferenceMethod::Relative;
 
    Integer ref_size = ref.size();
    NormType local_norm_max = {};
 
    if constexpr (IsNumeric) {
      bool is_use_local_norm = diff_method == eVariableComparerComputeDifferenceMethod::LocalNormMax;
      if (is_use_local_norm) {
        // Gros copier-coller pour calculer la norme globale
        ENUMERATE_ITEM (i, group) {
          Item item = *i;
          if (!item.isOwn() && !compare_ghost)
            continue;
          Integer index = item.localId();
          if (group_index_table) {
            index = (*group_index_table)[index];
            if (index < 0)
              continue;
          }
          if (index >= ref_size) {
            continue;
          }
          else {
            DataType dref = ref[index];
            NormType norm_max = VarDataTypeTraits::normeMax(dref);
            if (norm_max > local_norm_max) {
              local_norm_max = norm_max;
            }
          }
        }
      }
    }
    // On calcule les erreurs normalisées
    ENUMERATE_ITEM (i, group) {
      Item item = *i;
      if (!item.isOwn() && !compare_ghost)
        continue;
      Integer index = item.localId();
      if (group_index_table) {
        index = (*group_index_table)[index];
        if (index < 0)
          continue;
      }
      DataType diff = DataType();
      if (index >= ref_size) {
        ++nb_diff;
        compare_failed = true;
      }
      else {
        DataType dref = ref[index];
        DataType dcurrent = current[index];
        bool is_diff = _computeDifference(dref, dcurrent, diff, local_norm_max, diff_method);
        if (is_diff) {
          this->m_diffs_info.add(DiffInfo(dcurrent, dref, diff, item, NULL_ITEM_ID));
          ++nb_diff;
        }
      }
    }
    if (compare_failed) {
      Int32 sid = pm->commRank();
      const String& var_name = var->name();
      msg->pinfo() << "Processor " << sid << " : "
                   << "comparison impossible because the number of the elements is different "
                   << " for the variable " << var_name << " ref_size=" << ref_size;
    }
    if (nb_diff != 0)
      this->_sortAndDump(var, pm, max_print);
 
    return VariableComparerResults(nb_diff);
  }
 
  VariableComparerResults
  checkReplica(IVariable* var, ConstArrayView<DataType> var_value,
               const VariableComparerArgs& compare_args)
  {
    IParallelMng* replica_pm = var->_internalApi()->replicaParallelMng();
    if (!replica_pm)
      return {};
    // Appelle la bonne spécialisation pour être certain que le type template possède
    // la réduction.
    using ReduceType = typename VariableDataTypeTraitsT<DataType>::HasReduceMinMax;
    if constexpr(std::is_same<TrueType,ReduceType>::value)
      return _checkReplica2(replica_pm, var, var_value, compare_args);
 
    ARCANE_UNUSED(replica_pm);
    ARCANE_UNUSED(var);
    ARCANE_UNUSED(var_value);
    ARCANE_UNUSED(compare_args);
    throw NotSupportedException(A_FUNCINFO);
  }
 
 private:
 
  VariableComparerResults
  _checkAsArray(IVariable* var, ConstArrayView<DataType> ref, ConstArrayView<DataType> current,
                const VariableComparerArgs& compare_args)
  {
    const int max_print = compare_args.maxPrint();
    IParallelMng* pm = var->variableMng()->parallelMng();
    ITraceMng* msg = pm->traceMng();
 
    int nb_diff = 0;
    bool compare_failed = false;
    Integer ref_size = ref.size();
    Integer current_size = current.size();
    eVariableComparerComputeDifferenceMethod diff_method = compare_args.computeDifferenceMethod();
    // Pas de norme max si le type n'est pas numérique.
    if (!IsNumeric)
      diff_method = eVariableComparerComputeDifferenceMethod::Relative;
    NormType local_norm_max = {};
 
    if constexpr (IsNumeric) {
      bool is_use_local_norm = compare_args.computeDifferenceMethod() == eVariableComparerComputeDifferenceMethod::LocalNormMax;
      if (is_use_local_norm) {
        // Gros copier-coller pour calculer la norme globale
        for (Integer index = 0; index < current_size; ++index) {
          if (index >= ref_size) {
            continue;
          }
          else {
            DataType dref = ref[index];
            typename VarDataTypeTraits::NormType norm_max = VarDataTypeTraits::normeMax(dref);
            if (norm_max > local_norm_max) {
              local_norm_max = norm_max;
            }
          }
        }
      }
    }
    // On calcule les erreurs normalisées
    for( Integer index=0; index<current_size; ++index ){
      DataType diff = DataType();
      if (index>=ref_size){
        ++nb_diff;
        compare_failed = true;
      }
      else{
        DataType dref = ref[index];
        DataType dcurrent = current[index];
        if (_computeDifference(dref, dcurrent, diff, local_norm_max, diff_method)) {
          this->m_diffs_info.add(DiffInfo(dcurrent,dref,diff,index,NULL_ITEM_ID));
          ++nb_diff;
        }
      }
    }
    if (compare_failed){
      Int32 sid = pm->commRank();
      const String& var_name = var->name();
      msg->pinfo() << "Processor " << sid << " : "
                   << " comparaison impossible car nombre d'éléments différents"
                   << " pour la variable " << var_name << " ref_size=" << ref_size;
        
    }
    if (nb_diff!=0)
      this->_sortAndDump(var,pm,max_print);
 
    return VariableComparerResults(nb_diff);
  }
 
  VariableComparerResults
  _checkReplica2(IParallelMng* pm, IVariable* var, ConstArrayView<DataType> var_values,
                 const VariableComparerArgs& compare_args)
  {
    const int max_print = compare_args.maxPrint();
    ITraceMng* msg = pm->traceMng();
    Integer size = var_values.size();
    // Vérifie que tous les réplica ont le même nombre d'éléments pour la variable.
    Integer max_size = pm->reduce(Parallel::ReduceMax,size);
    Integer min_size = pm->reduce(Parallel::ReduceMin,size);
    msg->info(5) << "CheckReplica2 rep_size=" << pm->commSize() << " rank=" << pm->commRank();
    if (max_size!=min_size){
      const String& var_name = var->name();
      msg->info() << "Can not compare values on replica for variable '" << var_name << "'"
                  << " because the number of elements is not the same on all the replica "
                  << " min=" << min_size << " max="<< max_size;
      return VariableComparerResults(max_size);
    }
    Integer nb_diff = 0;
    UniqueArray<DataType> min_values(var_values);
    UniqueArray<DataType> max_values(var_values);
    pm->reduce(Parallel::ReduceMax,max_values);
    pm->reduce(Parallel::ReduceMin,min_values);
 
    for( Integer index=0; index<size; ++index ){
      DataType diff = DataType();
      DataType min_val = min_values[index];
      DataType max_val = max_values[index];
      if (VarDataTypeTraits::verifDifferent(min_val,max_val,diff,true)){
        this->m_diffs_info.add(DiffInfo(min_val,max_val,diff,index,NULL_ITEM_ID));
        ++nb_diff;
      }
    }
    if (nb_diff!=0)
      this->_sortAndDump(var,pm,max_print);
 
    return VariableComparerResults(nb_diff);
  }
  bool _computeDifference(const DataType& dref, const DataType& dcurrent, DataType& diff,
                          const NormType& local_norm_max,
                          eVariableComparerComputeDifferenceMethod diff_method)
  {
    bool is_diff = false;
    switch (diff_method) {
    case eVariableComparerComputeDifferenceMethod::Relative:
      is_diff = VarDataTypeTraits::verifDifferent(dref, dcurrent, diff, true);
      break;
    case eVariableComparerComputeDifferenceMethod::LocalNormMax:
      is_diff = VarDataTypeTraits::verifDifferentNorm(dref, dcurrent, diff, local_norm_max, true);
      break;
    }
    return is_diff;
  }
};
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> VariableArrayT<T>::
VariableArrayT(const VariableBuildInfo& vb,const VariableInfo& info)
: Variable(vb,info)
, m_value(nullptr)
{
  IDataFactoryMng* df = vb.dataFactoryMng();
  DataStorageBuildInfo storage_build_info(vb.traceMng());
  String storage_full_type = info.storageTypeInfo().fullName();
  Ref<IData> data = df->createSimpleDataRef(storage_full_type,storage_build_info);
  m_value = dynamic_cast<ValueDataType*>(data.get());
  ARCANE_CHECK_POINTER(m_value);
  _setData(makeRef(m_value));
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> VariableArrayT<T>::
~VariableArrayT()
{
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> VariableArrayT<T>* VariableArrayT<T>::
getReference(const VariableBuildInfo& vb,const VariableInfo& vi)
{
  if (vb.isNull())
    return nullptr;
  ThatClass* true_ptr = nullptr;
  IVariableMng* vm = vb.variableMng();
  IVariable* var = vm->checkVariable(vi);
  if (var)
    true_ptr = dynamic_cast<ThatClass*>(var);
  else{
    true_ptr = new ThatClass(vb,vi);
    vm->_internalApi()->addVariable(true_ptr);
  }
  ARCANE_CHECK_PTR(true_ptr);
  return true_ptr;
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> VariableArrayT<T>* VariableArrayT<T>::
getReference(IVariable* var)
{
  if (!var)
    throw ArgumentException(A_FUNCINFO,"null variable");
  auto* true_ptr = dynamic_cast<ThatClass*>(var);
  if (!true_ptr)
    ARCANE_FATAL("Can not build a reference from variable {0}",var->name());
  return true_ptr;
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
print(std::ostream& o) const
{
  ConstArrayView<T> x(m_value->view());
  Integer size = x.size();
  o << "(dimension=" << size << ") ";
  if (size<=150){
    for( auto& i : x ){
      o << i << '\n';
    }
  }
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
synchronize()
{
  if (itemKind()==IK_Unknown)
    ARCANE_THROW(NotSupportedException,"variable '{0}' is not a mesh variable",fullName());
  IItemFamily* family = itemGroup().itemFamily();
  if (!family)
    ARCANE_FATAL("variable '{0}' without family",fullName());
  if(isPartial())
    itemGroup().synchronizer()->synchronize(this);
  else
    family->allItemsSynchronizer()->synchronize(this);
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
synchronize(Int32ConstArrayView local_ids)
{
  if (itemKind()==IK_Unknown)
    ARCANE_THROW(NotSupportedException,"variable '{0}' is not a mesh variable",fullName());
  IItemFamily* family = itemGroup().itemFamily();
  if (!family)
    ARCANE_FATAL("variable '{0}' without family",fullName());
  if(isPartial())
    itemGroup().synchronizer()->synchronize(this, local_ids);
  else
    family->allItemsSynchronizer()->synchronize(this, local_ids);
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> Real VariableArrayT<T>::
allocatedMemory() const
{
  Real v1 = (Real)(sizeof(T));
  Real v2 = (Real)(m_value->view().size());
  return v1 * v2;
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
// Utilise une fonction Helper afin de spécialiser l'appel dans le
// cas du type 'Byte' car ArrayVariableDiff::checkReplica() utilise
// une réduction Min/Max et cela n'existe pas en MPI pour le type Byte.
namespace
{
  template <typename T> VariableComparerResults
  _checkIfSameOnAllReplicaHelper(IVariable* var, ConstArrayView<T> values,
                                 const VariableComparerArgs& compare_args)
  {
    ArrayVariableDiff<T> csa;
    return csa.checkReplica(var, values, compare_args);
  }
 
  // Spécialisation pour le type 'Byte' qui ne supporte pas les réductions.
  VariableComparerResults
  _checkIfSameOnAllReplicaHelper(IVariable* var, ConstArrayView<Byte> values,
                                 const VariableComparerArgs& compare_args)
  {
    Integer size = values.size();
    UniqueArray<Integer> int_values(size);
    for( Integer i=0; i<size; ++i )
      int_values[i] = values[i];
    ArrayVariableDiff<Integer> csa;
    return csa.checkReplica(var, int_values, compare_args);
  }
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> VariableComparerResults VariableArrayT<T>::
_compareVariable(const VariableComparerArgs& compare_args)
{
  switch (compare_args.compareMode()) {
  case eVariableComparerCompareMode::Same: {
 
    if (itemKind() == IK_Particle)
      return {};
    IDataReader* reader = compare_args.dataReader();
    ARCANE_CHECK_POINTER(reader);
 
    ArrayView<T> from_array(valueView());
 
    Ref<IArrayDataT<T>> ref_data(m_value->cloneTrueEmptyRef());
    reader->read(this, ref_data.get());
 
    ArrayVariableDiff<T> csa;
    VariableComparerResults r = csa.check(this, ref_data->view(), from_array, compare_args);
    return r;
  }
  case eVariableComparerCompareMode::Sync: {
    IItemFamily* family = itemGroup().itemFamily();
    if (!family)
      return {};
    ValueType& data_values = m_value->_internal()->_internalDeprecatedValue();
    UniqueArray<T> ref_array(constValueView());
    this->synchronize(); // fonctionne pour toutes les variables
    ArrayVariableDiff<T> csa;
    ConstArrayView<T> from_array(constValueView());
    VariableComparerResults r = csa.check(this, ref_array, from_array, compare_args);
    data_values.copy(ref_array);
    return r;
  }
  case eVariableComparerCompareMode::SameOnAllReplica: {
    VariableComparerResults r = _checkIfSameOnAllReplicaHelper(this, constValueView(), compare_args);
    return r;
  }
  }
  ARCANE_FATAL("Invalid value for compare mode '{0}'", (int)compare_args.compareMode());
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
template<typename T> bool VariableArrayT<T>::
initialize(const ItemGroup& group,const String& value)
{
  //TODO: peut-être vérifier que la variable est utilisée ?
 
  // Tente de convertir value en une valeur du type de la variable.
  T v = T();
  bool is_bad = VariableDataTypeTraitsT<T>::getValue(v,value);
 
  if (is_bad){
    error() << String::format("Can not convert the string '{0}' to type '{1}'",
                              value,dataType());
    return true;
  }
 
  bool is_ok = false;
 
  ArrayView<T> values(m_value->view());
  if (group.itemFamily()==itemFamily()){
    is_ok = true;
    // TRES IMPORTANT
    //TODO doit utiliser une indirection et une hierarchie entre groupe
    // Enfin, affecte la valeur \a v à toutes les entités du groupe.
    //ValueType& var_value = this->value();
    ENUMERATE_ITEM(i,group){
      Item elem = *i;
      values[elem.localId()] = v;
    }
  }
 
  if (is_ok)
    return false;
 
  eItemKind group_kind = group.itemKind();
 
  error() << "The type of elements (" << itemKindName(group_kind)
          << ") of the group `" << group.name() << "' does not match \n"
          << "the type of the variable (" << itemKindName(this->itemKind()) << ").";
  return true;
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
copyItemsValues(Int32ConstArrayView source, Int32ConstArrayView destination)
{
  ARCANE_ASSERT(source.size()==destination.size(),
                ("Impossible to copy: source and destination of different sizes !"));
  ArrayView<T> value =  m_value->view();
  const Integer size = source.size();
  for(Integer i=0; i<size; ++i )
    value[destination[i]] = value[source[i]];
  syncReferences();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
copyItemsMeanValues(Int32ConstArrayView first_source,
                    Int32ConstArrayView second_source,
                    Int32ConstArrayView destination)
{
  ARCANE_ASSERT((first_source.size()==destination.size()) && (second_source.size()==destination.size()),
                ("Impossible to copy: source and destination of different sizes !"));
  ArrayView<T> value =  m_value->view();
  const Integer size = first_source.size();
  for(Integer i=0; i<size; ++i ) {
    value[destination[i]] = (T)((value[first_source[i]]+value[second_source[i]])/2);
  }
  syncReferences();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<> void VariableArrayT<String>::
copyItemsMeanValues(Int32ConstArrayView first_source,
                    Int32ConstArrayView second_source,
                    Int32ConstArrayView destination);
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
compact(Int32ConstArrayView new_to_old_ids)
{
  if (isPartial()) {
    debug(Trace::High) << "Skip compact for partial variable " << name();
    return;
  }
 
  UniqueArray<T> old_value(constValueView());
  Integer new_size = new_to_old_ids.size();
  m_value->resize(new_size);
  ArrayView<T> current_value = m_value->view();
  if (arcaneIsCheck()){
    for( Integer i=0; i<new_size; ++i )
      current_value.setAt(i,old_value.at(new_to_old_ids[i]));
  }
  else{
    for( Integer i=0; i<new_size; ++i )
      RawCopy<T>::copy(current_value[i], old_value[ new_to_old_ids[i] ]); // current_value[i] = old_value[ new_to_old_ids[i] ];
  }
  syncReferences();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
setIsSynchronized()
{
  setIsSynchronized(itemGroup());
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
setIsSynchronized(const ItemGroup& group)
{
  ARCANE_UNUSED(group);
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename T> void VariableArrayT<T>::
_internalResize(const VariableResizeArgs& resize_args)
{
  Int32 new_size = resize_args.newSize();
  Int32 nb_additional_element = resize_args.nbAdditionalCapacity();
  bool use_no_init = resize_args.isUseNoInit();
 
  auto* value_internal = m_value->_internal();
 
  if (nb_additional_element!=0){
    Integer capacity = value_internal->capacity();
    if (new_size>capacity)
      value_internal->reserve(new_size+nb_additional_element);
  }
  eDataInitialisationPolicy init_policy = getGlobalDataInitialisationPolicy();
  // Si la nouvelle taille est supérieure à l'ancienne,
  // initialise les nouveaux éléments suivant
  // la politique voulue
  Integer current_size = m_value->view().size();
  if (!isUsed()){
    // Si la variable n'est plus utilisée, libérée la mémoire
    // associée.
    value_internal->dispose();
  }
  if (use_no_init)
    value_internal->_internalDeprecatedValue().resizeNoInit(new_size);
  else
    value_internal->resize(new_size);
  if (new_size>current_size){
    if (init_policy==DIP_InitWithDefault){
      ArrayView<T> values = this->valueView();
      for(Integer i=current_size; i<new_size; ++i)
        values[i] = T();
    }
    else{
      bool use_nan = (init_policy==DIP_InitWithNan);
      bool use_nan2 = (init_policy==DIP_InitInitialWithNanResizeWithDefault) && !_hasValidData();
      if (use_nan || use_nan2){
        ArrayView<T> view = this->valueView();
        DataTypeTraitsT<T>::fillNan(view.subView(current_size,new_size-current_size));
      }
    }
  }
 
  // Compacte la mémoire si demandé
  if (_wantShrink()){
    if (m_value->view().size() < value_internal->capacity()){
      value_internal->shrink();
    }
  }
 
  // Controle si toutes les modifs après le dispose n'ont pas altéré l'état de l'allocation
  // Dans le cas d'une variable non utilisée, la capacité max autorisée est
  // égale à celle d'un vecteur Simd de la plateforme.
  // (cela ne peut pas être 0 car la classe Array doit allouer au moins un
  // élément si on utilise un allocateur spécifique ce qui est le cas
  // pour les variables.
  Int64 capacity = value_internal->capacity();
  if ( !((isUsed() || capacity<=AlignedMemoryAllocator::simdAlignment())) )
    ARCANE_FATAL("Wrong unused data size {0}",capacity);
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> void VariableArrayT<DataType>::
resizeWithReserve(Integer n,Integer nb_additional)
{
  _resize(VariableResizeArgs(n,nb_additional));
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> void VariableArrayT<DataType>::
shrinkMemory()
{
  m_value->_internal()->shrink();
  syncReferences();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> Integer VariableArrayT<DataType>::
capacity()
{
  return m_value->_internal()->capacity();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> void VariableArrayT<DataType>::
fill(const DataType& value)
{
  m_value->view().fill(value);
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> void VariableArrayT<DataType>::
fill(const DataType& value,const ItemGroup& group)
{
  ARCANE_UNUSED(group);
  this->fill(value);
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> void
VariableArrayT<DataType>::
swapValues(ThatClass& rhs)
{
  _checkSwapIsValid(&rhs);
  // TODO: regarder s'il faut que les deux variables aient le même nombre
  // d'éléments mais a priori cela ne semble pas indispensable.
  m_value->swapValues(rhs.m_value);
  // Il faut mettre à jour les références pour cette variable et \a rhs.
  syncReferences();
  rhs.syncReferences();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
// SDP: Specialisation
template<> void VariableArrayT<String>::
copyItemsMeanValues(Int32ConstArrayView first_source,
                    Int32ConstArrayView second_source,
                    Int32ConstArrayView destination)
{
  Integer dsize = destination.size();
  bool is_ok = (first_source.size()==dsize) && (second_source.size()==dsize);
  if (!is_ok)
    ARCANE_FATAL("Unable to copy: source and destination of different sizes !");
 
  ArrayView<String> value =  m_value->view();
  const Integer size = first_source.size();
  for(Integer i=0; i<size; ++i )
    value[destination[i]] = value[first_source[i]];
  syncReferences();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
template<typename DataType> auto VariableArrayT<DataType>::
value() -> ValueType&
{
  return m_value->_internal()->_internalDeprecatedValue();
}
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
ARCANE_INTERNAL_INSTANTIATE_TEMPLATE_FOR_NUMERIC_DATATYPE(VariableArrayT);
template class VariableArrayT<String>;
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
} // End namespace Arcane
 
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/