3#ifndef DUNE_COMMUNICATOR
4#define DUNE_COMMUNICATOR
169 template<
class K,
class A,
int n>
197 static const IndexedType& gather(
const T& vec, std::size_t i);
199 static void scatter(T& vec,
const IndexedType& v, std::size_t i);
247 DatatypeCommunicator();
252 ~DatatypeCommunicator();
280 template<
class T1,
class T2,
class V>
281 void build(
const RemoteIndices& remoteIndices,
const T1& sourceFlags, V& sendData,
const T2& destFlags, V& receiveData);
310 typedef std::map<int,std::pair<MPI_Datatype,MPI_Datatype> >
316 MessageTypeMap messageTypes;
323 MPI_Request* requests_[2];
333 template<
class V,
bool FORWARD>
334 void createRequests(V& sendData, V& receiveData);
339 template<
class T1,
class T2,
class V,
bool send>
340 void createDataTypes(
const T1& source,
const T2& destination, V& data);
345 void sendRecv(MPI_Request* req);
350 struct IndexedTypeInformation
360 displ =
new MPI_Aint[i];
394 struct MPIDatatypeInformation
400 MPIDatatypeInformation(
const V& data) : data_(data)
408 void reserve(
int proc,
int size)
410 information_[proc].build(size);
418 void add(
int proc,
int local)
420 IndexedTypeInformation& info=information_[proc];
421 assert((info.elements)<info.size);
423 info.displ+info.elements);
432 std::map<int,IndexedTypeInformation> information_;
466 template<
class Data,
class Interface>
467 typename std::enable_if<std::is_same<SizeOne,typename CommPolicy<Data>::IndexedTypeFlag>::value,
void>::type
477 template<
class Data,
class Interface>
508 template<
class GatherScatter,
class Data>
539 template<
class GatherScatter,
class Data>
567 template<
class GatherScatter,
class Data>
595 template<
class GatherScatter,
class Data>
613 typedef std::map<int,std::pair<InterfaceInformation,InterfaceInformation> >
620 template<
class Data,
typename IndexedTypeFlag>
621 struct MessageSizeCalculator
629 struct MessageSizeCalculator<Data,
SizeOne>
654 struct MessageSizeCalculator<Data,VariableSize>
664 inline int operator()(
const Data& data,
const InterfaceInformation& info)
const;
670 template<
class Data,
class GatherScatter,
bool send,
typename IndexedTypeFlag>
671 struct MessageGatherer
678 template<
class Data,
class GatherScatter,
bool send>
679 struct MessageGatherer<Data,GatherScatter,send,SizeOne>
688 typedef GatherScatter Gatherer;
706 inline void operator()(
const InterfaceMap& interface,
const Data& data, Type* buffer,
size_t bufferSize)
const;
713 template<
class Data,
class GatherScatter,
bool send>
714 struct MessageGatherer<Data,GatherScatter,send,VariableSize>
723 typedef GatherScatter Gatherer;
741 inline void operator()(
const InterfaceMap& interface,
const Data& data, Type* buffer,
size_t bufferSize)
const;
747 template<
class Data,
class GatherScatter,
bool send,
typename IndexedTypeFlag>
748 struct MessageScatterer
755 template<
class Data,
class GatherScatter,
bool send>
756 struct MessageScatterer<Data,GatherScatter,send,SizeOne>
765 typedef GatherScatter Scatterer;
783 inline void operator()(
const InterfaceMap& interface, Data& data, Type* buffer,
const int& proc)
const;
789 template<
class Data,
class GatherScatter,
bool send>
790 struct MessageScatterer<Data,GatherScatter,send,VariableSize>
799 typedef GatherScatter Scatterer;
817 inline void operator()(
const InterfaceMap& interface, Data& data, Type* buffer,
const int& proc)
const;
823 struct MessageInformation
827 : start_(0), size_(0)
837 MessageInformation(
size_t start,
size_t size)
838 : start_(start), size_(size)
856 typedef std::map<int,std::pair<MessageInformation,MessageInformation> >
861 InformationMap messageInformation_;
869 size_t bufferSize_[2];
881 std::map<int,std::pair<InterfaceInformation,InterfaceInformation> > interfaces_;
883 MPI_Comm communicator_;
888 template<
class GatherScatter,
bool FORWARD,
class Data>
889 void sendRecv(
const Data& source, Data& target);
909 template<
class K,
class A,
int n>
910 inline const void* CommPolicy<VariableBlockVector<FieldVector<K, n>, A> >::getAddress(
const Type& v,
int index)
912 return &(v[index][0]);
915 template<
class K,
class A,
int n>
916 inline int CommPolicy<VariableBlockVector<FieldVector<K, n>, A> >::getSize(
const Type& v,
int index)
918 return v[index].getsize();
922 inline const typename CopyGatherScatter<T>::IndexedType& CopyGatherScatter<T>::gather(
const T & vec, std::size_t i)
928 inline void CopyGatherScatter<T>::scatter(T& vec,
const IndexedType& v, std::size_t i)
934 DatatypeCommunicator<T>::DatatypeCommunicator()
935 : remoteIndices_(0), created_(false)
944 DatatypeCommunicator<T>::~DatatypeCommunicator()
950 template<
class T1,
class T2,
class V>
951 inline void DatatypeCommunicator<T>::build(
const RemoteIndices& remoteIndices,
952 const T1& source, V& sendData,
953 const T2& destination, V& receiveData)
955 remoteIndices_ = &remoteIndices;
957 createDataTypes<T1,T2,V,false>(source,destination, receiveData);
958 createDataTypes<T1,T2,V,true>(source,destination, sendData);
959 createRequests<V,true>(sendData, receiveData);
960 createRequests<V,false>(receiveData, sendData);
965 void DatatypeCommunicator<T>::free()
968 delete[] requests_[0];
969 delete[] requests_[1];
970 typedef MessageTypeMap::iterator iterator;
971 typedef MessageTypeMap::const_iterator const_iterator;
973 const const_iterator end=messageTypes.end();
975 for(iterator process = messageTypes.begin(); process != end; ++process) {
976 MPI_Datatype *type = &(process->second.first);
978 MPI_Finalized(&finalized);
979 if(*type!=MPI_DATATYPE_NULL && !finalized)
981 type = &(process->second.second);
982 if(*type!=MPI_DATATYPE_NULL && !finalized)
985 messageTypes.clear();
992 template<
class T1,
class T2,
class V,
bool send>
993 void DatatypeCommunicator<T>::createDataTypes(
const T1& sourceFlags,
const T2& destFlags, V& data)
996 MPIDatatypeInformation<V> dataInfo(data);
997 this->
template buildInterface<RemoteIndices,T1,T2,MPIDatatypeInformation<V>,send>(*remoteIndices_,sourceFlags, destFlags, dataInfo);
999 typedef typename RemoteIndices::RemoteIndexMap::const_iterator const_iterator;
1000 const const_iterator end=this->remoteIndices_->end();
1003 for(const_iterator process=this->remoteIndices_->begin(); process != end; ++process) {
1004 IndexedTypeInformation& info=dataInfo.information_[process->first];
1009 for(
int i=0; i< info.elements; i++) {
1010 info.displ[i]-=base;
1014 MPI_Datatype* type = &( send ? messageTypes[process->first].first : messageTypes[process->first].second);
1015 MPI_Type_create_hindexed(info.elements, info.length, info.displ,
1017 MPI_Type_commit(type);
1023 template<
typename T>
1024 template<
class V,
bool createForward>
1025 void DatatypeCommunicator<T>::createRequests(V& sendData, V& receiveData)
1027 typedef std::map<int,std::pair<MPI_Datatype,MPI_Datatype> >::const_iterator MapIterator;
1029 static int index = createForward ? 1 : 0;
1030 int noMessages = messageTypes.size();
1032 requests_[index] =
new MPI_Request[2*noMessages];
1033 const MapIterator end = messageTypes.end();
1035 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
1038 for(MapIterator process = messageTypes.begin(); process != end;
1039 ++process, ++request) {
1040 MPI_Datatype type = createForward ? process->second.second : process->second.first;
1042 MPI_Recv_init(address, 1, type, process->first, commTag_, this->remoteIndices_->communicator(), requests_[index]+request);
1047 for(MapIterator process = messageTypes.begin(); process != end;
1048 ++process, ++request) {
1049 MPI_Datatype type = createForward ? process->second.first : process->second.second;
1051 MPI_Ssend_init(address, 1, type, process->first, commTag_, this->remoteIndices_->communicator(), requests_[index]+request);
1055 template<
typename T>
1056 void DatatypeCommunicator<T>::forward()
1058 sendRecv(requests_[1]);
1061 template<
typename T>
1062 void DatatypeCommunicator<T>::backward()
1064 sendRecv(requests_[0]);
1067 template<
typename T>
1068 void DatatypeCommunicator<T>::sendRecv(MPI_Request* requests)
1070 int noMessages = messageTypes.size();
1072 MPI_Startall(noMessages, requests);
1074 MPI_Startall(noMessages, requests+noMessages);
1077 MPI_Status* status=
new MPI_Status[2*noMessages];
1078 for(
int i=0; i<2*noMessages; i++)
1079 status[i].MPI_ERROR=MPI_SUCCESS;
1081 int send = MPI_Waitall(noMessages, requests+noMessages, status+noMessages);
1082 int receive = MPI_Waitall(noMessages, requests, status);
1085 int success=1, globalSuccess=0;
1086 if(send==MPI_ERR_IN_STATUS) {
1088 MPI_Comm_rank(this->remoteIndices_->communicator(), &rank);
1089 std::cerr<<rank<<
": Error in sending :"<<std::endl;
1091 for(
int i=noMessages; i< 2*noMessages; i++)
1092 if(status[i].MPI_ERROR!=MPI_SUCCESS) {
1095 MPI_Error_string(status[i].MPI_ERROR, message, &messageLength);
1096 std::cerr<<
" source="<<status[i].MPI_SOURCE<<
" message: ";
1097 for(
int j = 0; j < messageLength; j++)
1098 std::cout << message[j];
1100 std::cerr<<std::endl;
1104 if(receive==MPI_ERR_IN_STATUS) {
1106 MPI_Comm_rank(this->remoteIndices_->communicator(), &rank);
1107 std::cerr<<rank<<
": Error in receiving!"<<std::endl;
1109 for(
int i=0; i< noMessages; i++)
1110 if(status[i].MPI_ERROR!=MPI_SUCCESS) {
1113 MPI_Error_string(status[i].MPI_ERROR, message, &messageLength);
1114 std::cerr<<
" source="<<status[i].MPI_SOURCE<<
" message: ";
1115 for(
int j = 0; j < messageLength; j++)
1116 std::cerr << message[j];
1118 std::cerr<<std::endl;
1122 MPI_Allreduce(&success, &globalSuccess, 1, MPI_INT, MPI_MIN, this->remoteIndices_->communicator());
1127 DUNE_THROW(CommunicationError,
"A communication error occurred!");
1139 template<
class Data,
class Interface>
1140 typename std::enable_if<std::is_same<SizeOne, typename CommPolicy<Data>::IndexedTypeFlag>::value,
void>::type
1143 interfaces_=interface.interfaces();
1144 communicator_=interface.communicator();
1145 typedef typename std::map<int,std::pair<InterfaceInformation,InterfaceInformation> >
1146 ::const_iterator const_iterator;
1148 const const_iterator end = interfaces_.end();
1150 MPI_Comm_rank(communicator_, &lrank);
1155 for(const_iterator interfacePair = interfaces_.begin();
1156 interfacePair != end; ++interfacePair) {
1157 int noSend = MessageSizeCalculator<Data,Flag>() (interfacePair->second.first);
1158 int noRecv = MessageSizeCalculator<Data,Flag>() (interfacePair->second.second);
1159 if (noSend + noRecv > 0)
1160 messageInformation_.insert(std::make_pair(interfacePair->first,
1161 std::make_pair(MessageInformation(bufferSize_[0],
1163 MessageInformation(bufferSize_[1],
1165 bufferSize_[0] += noSend;
1166 bufferSize_[1] += noRecv;
1173 buffers_[0] =
new char[bufferSize_[0]];
1174 buffers_[1] =
new char[bufferSize_[1]];
1177 template<
class Data,
class Interface>
1181 interfaces_=interface.interfaces();
1182 communicator_=interface.communicator();
1183 typedef typename std::map<int,std::pair<InterfaceInformation,InterfaceInformation> >
1184 ::const_iterator const_iterator;
1186 const const_iterator end = interfaces_.end();
1191 for(const_iterator interfacePair = interfaces_.begin();
1192 interfacePair != end; ++interfacePair) {
1193 int noSend = MessageSizeCalculator<Data,Flag>() (source, interfacePair->second.first);
1194 int noRecv = MessageSizeCalculator<Data,Flag>() (dest, interfacePair->second.second);
1195 if (noSend + noRecv > 0)
1196 messageInformation_.insert(std::make_pair(interfacePair->first,
1197 std::make_pair(MessageInformation(bufferSize_[0],
1199 MessageInformation(bufferSize_[1],
1201 bufferSize_[0] += noSend;
1202 bufferSize_[1] += noRecv;
1208 buffers_[0] =
new char[bufferSize_[0]];
1209 buffers_[1] =
new char[bufferSize_[1]];
1214 messageInformation_.clear();
1216 delete[] buffers_[0];
1219 delete[] buffers_[1];
1220 buffers_[0]=buffers_[1]=0;
1228 template<
class Data>
1229 inline int BufferedCommunicator::MessageSizeCalculator<Data,SizeOne>::operator()
1230 (
const InterfaceInformation& info)
const
1236 template<
class Data>
1237 inline int BufferedCommunicator::MessageSizeCalculator<Data,SizeOne>::operator()
1238 (
const Data&,
const InterfaceInformation& info)
const
1240 return operator()(info);
1244 template<
class Data>
1245 inline int BufferedCommunicator::MessageSizeCalculator<Data, VariableSize>::operator()
1246 (
const Data& data,
const InterfaceInformation& info)
const
1250 for(
size_t i=0; i < info.size(); i++)
1257 template<
class Data,
class GatherScatter,
bool FORWARD>
1258 inline void BufferedCommunicator::MessageGatherer<Data,GatherScatter,FORWARD,VariableSize>::operator()(
const InterfaceMap& interfaces,
const Data& data, Type* buffer,
size_t bufferSize)
const
1261 typedef typename InterfaceMap::const_iterator
1265 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
1266 const const_iterator end = interfaces.end();
1269 for(const_iterator interfacePair = interfaces.begin();
1270 interfacePair != end; ++interfacePair) {
1271 int size = forward ? interfacePair->second.first.size() :
1272 interfacePair->second.second.size();
1274 for(
int i=0; i < size; i++) {
1275 int local = forward ? interfacePair->second.first[i] :
1276 interfacePair->second.second[i];
1277 for(std::size_t j=0; j < CommPolicy<Data>::getSize(data, local); j++, index++) {
1279#ifdef DUNE_ISTL_WITH_CHECKING
1282 buffer[index]=GatherScatter::gather(data, local, j);
1291 template<
class Data,
class GatherScatter,
bool FORWARD>
1292 inline void BufferedCommunicator::MessageGatherer<Data,GatherScatter,FORWARD,SizeOne>::operator()(
const InterfaceMap& interfaces,
const Data& data, Type* buffer,
size_t bufferSize)
const
1295 typedef typename InterfaceMap::const_iterator
1297 const const_iterator end = interfaces.end();
1301 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
1303 for(const_iterator interfacePair = interfaces.begin();
1304 interfacePair != end; ++interfacePair) {
1305 size_t size = FORWARD ? interfacePair->second.first.size() :
1306 interfacePair->second.second.size();
1308 for(
size_t i=0; i < size; i++) {
1310#ifdef DUNE_ISTL_WITH_CHECKING
1314 buffer[index++] = GatherScatter::gather(data, FORWARD ? interfacePair->second.first[i] :
1315 interfacePair->second.second[i]);
1322 template<
class Data,
class GatherScatter,
bool FORWARD>
1323 inline void BufferedCommunicator::MessageScatterer<Data,GatherScatter,FORWARD,VariableSize>::operator()(
const InterfaceMap& interfaces, Data& data, Type* buffer,
const int& proc)
const
1325 typedef typename InterfaceMap::value_type::second_type::first_type Information;
1326 const typename InterfaceMap::const_iterator infoPair = interfaces.find(proc);
1328 assert(infoPair!=interfaces.end());
1330 const Information& info = FORWARD ? infoPair->second.second :
1331 infoPair->second.first;
1333 for(
size_t i=0, index=0; i < info.size(); i++) {
1334 for(
size_t j=0; j < CommPolicy<Data>::getSize(data, info[i]); j++)
1335 GatherScatter::scatter(data, buffer[index++], info[i], j);
1340 template<
class Data,
class GatherScatter,
bool FORWARD>
1341 inline void BufferedCommunicator::MessageScatterer<Data,GatherScatter,FORWARD,SizeOne>::operator()(
const InterfaceMap& interfaces, Data& data, Type* buffer,
const int& proc)
const
1343 typedef typename InterfaceMap::value_type::second_type::first_type Information;
1344 const typename InterfaceMap::const_iterator infoPair = interfaces.find(proc);
1346 assert(infoPair!=interfaces.end());
1348 const Information& info = FORWARD ? infoPair->second.second :
1349 infoPair->second.first;
1351 for(
size_t i=0; i < info.size(); i++) {
1352 GatherScatter::scatter(data, buffer[i], info[i]);
1357 template<
class GatherScatter,
class Data>
1360 this->
template sendRecv<GatherScatter,true>(data, data);
1364 template<
class GatherScatter,
class Data>
1367 this->
template sendRecv<GatherScatter,false>(data, data);
1371 template<
class GatherScatter,
class Data>
1374 this->
template sendRecv<GatherScatter,true>(source, dest);
1378 template<
class GatherScatter,
class Data>
1381 this->
template sendRecv<GatherScatter,false>(dest, source);
1385 template<
class GatherScatter,
bool FORWARD,
class Data>
1386 void BufferedCommunicator::sendRecv(
const Data& source, Data& dest)
1390 MPI_Comm_rank(MPI_COMM_WORLD,&rank);
1391 MPI_Comm_rank(MPI_COMM_WORLD,&lrank);
1394 Type *sendBuffer, *recvBuffer;
1395 size_t sendBufferSize;
1397 size_t recvBufferSize;
1401 sendBuffer =
reinterpret_cast<Type*
>(buffers_[0]);
1402 sendBufferSize = bufferSize_[0];
1403 recvBuffer =
reinterpret_cast<Type*
>(buffers_[1]);
1405 recvBufferSize = bufferSize_[1];
1408 sendBuffer =
reinterpret_cast<Type*
>(buffers_[1]);
1409 sendBufferSize = bufferSize_[1];
1410 recvBuffer =
reinterpret_cast<Type*
>(buffers_[0]);
1412 recvBufferSize = bufferSize_[0];
1417 MessageGatherer<Data,GatherScatter,FORWARD,Flag>() (interfaces_, source, sendBuffer, sendBufferSize);
1419 MPI_Request* sendRequests =
new MPI_Request[messageInformation_.size()];
1420 MPI_Request* recvRequests =
new MPI_Request[messageInformation_.size()];
1422 size_t numberOfRealRecvRequests = 0;
1425 typedef typename InformationMap::const_iterator const_iterator;
1427 const const_iterator end = messageInformation_.end();
1429 int* processMap =
new int[messageInformation_.size()];
1431 for(const_iterator info = messageInformation_.begin(); info != end; ++info, ++i) {
1432 processMap[i]=info->first;
1435 Dune::dvverb<<rank<<
": receiving "<<info->second.second.size_<<
" from "<<info->first<<std::endl;
1436 if(info->second.second.size_) {
1437 MPI_Irecv(recvBuffer+info->second.second.start_, info->second.second.size_,
1438 MPI_BYTE, info->first, commTag_, communicator_,
1440 numberOfRealRecvRequests += 1;
1443 recvRequests[i]=MPI_REQUEST_NULL;
1447 Dune::dvverb<<rank<<
": receiving "<<info->second.first.size_<<
" to "<<info->first<<std::endl;
1448 if(info->second.first.size_) {
1449 MPI_Irecv(recvBuffer+info->second.first.start_, info->second.first.size_,
1450 MPI_BYTE, info->first, commTag_, communicator_,
1452 numberOfRealRecvRequests += 1;
1455 recvRequests[i]=MPI_REQUEST_NULL;
1462 for(const_iterator info = messageInformation_.begin(); info != end; ++info, ++i)
1465 Dune::dvverb<<rank<<
": sending "<<info->second.first.size_<<
" to "<<info->first<<std::endl;
1467 if(info->second.first.size_)
1468 MPI_Issend(sendBuffer+info->second.first.start_, info->second.first.size_,
1469 MPI_BYTE, info->first, commTag_, communicator_,
1473 sendRequests[i]=MPI_REQUEST_NULL;
1476 Dune::dvverb<<rank<<
": sending "<<info->second.second.size_<<
" to "<<info->first<<std::endl;
1477 if(info->second.second.size_)
1478 MPI_Issend(sendBuffer+info->second.second.start_, info->second.second.size_,
1479 MPI_BYTE, info->first, commTag_, communicator_,
1483 sendRequests[i]=MPI_REQUEST_NULL;
1489 int finished = MPI_UNDEFINED;
1493 for(i=0; i< numberOfRealRecvRequests; i++) {
1494 status.MPI_ERROR=MPI_SUCCESS;
1495 MPI_Waitany(messageInformation_.size(), recvRequests, &finished, &status);
1496 assert(finished != MPI_UNDEFINED);
1498 if(status.MPI_ERROR==MPI_SUCCESS) {
1499 int& proc = processMap[finished];
1500 typename InformationMap::const_iterator infoIter = messageInformation_.find(proc);
1501 assert(infoIter != messageInformation_.end());
1503 MessageInformation info = (FORWARD) ? infoIter->second.second : infoIter->second.first;
1504 assert(info.start_+info.size_ <= recvBufferSize);
1506 MessageScatterer<Data,GatherScatter,FORWARD,Flag>() (interfaces_, dest, recvBuffer+info.start_, proc);
1508 std::cerr<<rank<<
": MPI_Error occurred while receiving message from "<<processMap[finished]<<std::endl;
1513 MPI_Status recvStatus;
1516 for(i=0; i< messageInformation_.size(); i++)
1517 if(MPI_SUCCESS!=MPI_Wait(sendRequests+i, &recvStatus)) {
1518 std::cerr<<rank<<
": MPI_Error occurred while sending message to "<<processMap[finished]<<std::endl;
1528 delete[] processMap;
1529 delete[] sendRequests;
1530 delete[] recvRequests;
A communicator that uses buffers to gather and scatter the data to be send or received.
Definition: communicator.hh:452
void backward(Data &data)
Backward send where target and source are the same.
BufferedCommunicator()
Constructor.
~BufferedCommunicator()
Destructor.
void forward(const Data &source, Data &dest)
Send from source to target.
void free()
Free the allocated memory (i.e. buffers and message information.
std::enable_if< std::is_same< SizeOne, typenameCommPolicy< Data >::IndexedTypeFlag >::value, void >::type build(const Interface &interface)
Build the buffers and information for the communication process.
void backward(Data &source, const Data &dest)
Communicate in the reverse direction, i.e. send from target to source.
void build(const Data &source, const Data &target, const Interface &interface)
Build the buffers and information for the communication process.
void forward(Data &data)
Forward send where target and source are the same.
Error thrown if there was a problem with the communication.
Definition: communicator.hh:187
vector space out of a tensor product of fields.
Definition: fvector.hh:93
Default exception class for I/O errors.
Definition: exceptions.hh:229
Base class of all classes representing a communication interface.
Definition: interface.hh:33
Communication interface between remote and local indices.
Definition: interface.hh:207
An index present on the local process.
Definition: localindex.hh:33
Manager class for the mapping between local indices and globally unique indices.
Definition: indexset.hh:217
The indices present on remote processes.
Definition: remoteindices.hh:181
ParallelIndexSet::GlobalIndex GlobalIndex
The type of the global index.
Definition: remoteindices.hh:207
LocalIndex::Attribute Attribute
The type of the attribute.
Definition: remoteindices.hh:218
ParallelIndexSet::LocalIndex LocalIndex
The type of the local index.
Definition: remoteindices.hh:213
A Vector of blocks with different blocksizes.
Definition: vbvector.hh:41
A few common exception classes.
#define DUNE_THROW(E, m)
Definition: exceptions.hh:216
DVVerbType dvverb(std::cout)
stream for very verbose output.
Definition: stdstreams.hh:93
Provides classes for building the communication interface between remote indices.
Dune namespace.
Definition: alignment.hh:11
Classes describing a distributed indexset.
Standard Dune debug streams.
GatherScatter default implementation that just copies data.
Definition: communicator.hh:194
Default policy used for communicating an indexed type.
Definition: communicator.hh:120
V::value_type IndexedType
The type we get at each index with operator[].
Definition: communicator.hh:139
static int getSize(const V &, int index)
Get the number of primitve elements at that index.
SizeOne IndexedTypeFlag
Whether the indexed type has variable size or there is always one value at each index.
Definition: communicator.hh:145
static const void * getAddress(const V &v, int index)
Get the address of entry at an index.
V Type
The type the policy is for.
Definition: communicator.hh:132
Flag for marking indexed data structures where data at each index is of the same size.
Definition: communicator.hh:102
Flag for marking indexed data structures where the data at each index may be a variable multiple of a...
Definition: communicator.hh:110
Traits for type conversions and type information.
#define DUNE_UNUSED_PARAMETER(parm)
A macro to mark intentionally unused function parameters with.
Definition: unused.hh:18