701 lines
20 KiB
C++
701 lines
20 KiB
C++
#ifndef FRAMEWORK_CONTAINER_INDEXEDRINGMEMORY_H_
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#define FRAMEWORK_CONTAINER_INDEXEDRINGMEMORY_H_
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#include <framework/container/ArrayList.h>
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#include <framework/globalfunctions/CRC.h>
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#include <framework/serviceinterface/ServiceInterfaceStream.h>
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#include <framework/returnvalues/HasReturnvaluesIF.h>
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#include <framework/serialize/SerialArrayListAdapter.h>
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#include <cmath>
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template<typename T>
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class Index: public SerializeIF{
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/**
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* Index is the Type used for the list of indices. The template parameter is the type which describes the index, it needs to be a child of SerializeIF to be able to make it persistent
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*/
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static_assert(std::is_base_of<SerializeIF,T>::value,"Wrong Type for Index, Type must implement SerializeIF");
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public:
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Index():blockStartAddress(0),size(0),storedPackets(0){}
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Index(uint32_t startAddress):blockStartAddress(startAddress),size(0),storedPackets(0){
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}
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void setBlockStartAddress(uint32_t newAddress){
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this->blockStartAddress = newAddress;
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}
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uint32_t getBlockStartAddress() const {
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return blockStartAddress;
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}
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const T* getIndexType() const {
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return &indexType;
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}
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T* modifyIndexType(){
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return &indexType;
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}
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/**
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* Updates the index Type. Uses = operator
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* @param indexType Type to copy from
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*/
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void setIndexType(T* indexType) {
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this->indexType = *indexType;
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}
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uint32_t getSize() const {
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return size;
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}
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void setSize(uint32_t size) {
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this->size = size;
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}
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void addSize(uint32_t size){
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this->size += size;
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}
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void setStoredPackets(uint32_t newStoredPackets){
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this->storedPackets = newStoredPackets;
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}
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void addStoredPackets(uint32_t packets){
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this->storedPackets += packets;
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}
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uint32_t getStoredPackets() const{
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return this->storedPackets;
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}
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ReturnValue_t serialize(uint8_t** buffer, uint32_t* size,
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const uint32_t max_size, bool bigEndian) const {
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ReturnValue_t result = SerializeAdapter::serialize(&blockStartAddress,buffer,size,max_size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = indexType.serialize(buffer,size,max_size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = SerializeAdapter::serialize(&this->size,buffer,size,max_size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = SerializeAdapter::serialize(&this->storedPackets,buffer,size,max_size,bigEndian);
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return result;
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}
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ReturnValue_t deSerialize(const uint8_t** buffer, int32_t* size,
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bool bigEndian){
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ReturnValue_t result = SerializeAdapter::deSerialize(&blockStartAddress,buffer,size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = indexType.deSerialize(buffer,size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = SerializeAdapter::deSerialize(&this->size,buffer,size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = SerializeAdapter::deSerialize(&this->storedPackets,buffer,size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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return result;
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}
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uint32_t getSerializedSize() const {
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uint32_t size = SerializeAdapter::getSerializedSize(&blockStartAddress);
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size += indexType.getSerializedSize();
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size += SerializeAdapter::getSerializedSize(&this->size);
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size += SerializeAdapter::getSerializedSize(&this->storedPackets);
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return size;
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}
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bool operator==(const Index<T>& other){
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return ((blockStartAddress == other.getBlockStartAddress()) && (size==other.getSize())) && (indexType == *(other.getIndexType()));
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}
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private:
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uint32_t blockStartAddress;
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uint32_t size;
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uint32_t storedPackets;
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T indexType;
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};
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template<typename T>
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class IndexedRingMemoryArray: public SerializeIF, public ArrayList<Index<T>, uint32_t>{
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/**
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* Indexed Ring Memory Array is a class for a ring memory with indices. It assumes that the newest data comes in last
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* It uses the currentWriteBlock as pointer to the current writing position
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* The currentReadBlock must be set manually
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*/
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public:
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IndexedRingMemoryArray(uint32_t startAddress, uint32_t size, uint32_t bytesPerBlock, SerializeIF* additionalInfo,
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bool overwriteOld) :ArrayList<Index<T>,uint32_t>(NULL,(uint32_t)10,(uint32_t)0),totalSize(size),indexAddress(startAddress),currentReadSize(0),currentReadBlockSizeCached(0),lastBlockToReadSize(0), additionalInfo(additionalInfo),overwriteOld(overwriteOld){
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//Calculate the maximum number of indices needed for this blocksize
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uint32_t maxNrOfIndices = floor(static_cast<double>(size)/static_cast<double>(bytesPerBlock));
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//Calculate the Size needeed for the index itself
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uint32_t serializedSize = 0;
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if(additionalInfo!=NULL){
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serializedSize += additionalInfo->getSerializedSize();
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}
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//Size of current iterator type
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Index<T> tempIndex;
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serializedSize += tempIndex.getSerializedSize();
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//Add Size of Array
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serializedSize += sizeof(uint32_t); //size of array
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serializedSize += (tempIndex.getSerializedSize() * maxNrOfIndices); //size of elements
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serializedSize += sizeof(uint16_t); //size of crc
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//Calculate new size after index
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if(serializedSize > totalSize){
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error << "IndexedRingMemory: Store is too small for index" << std::endl;
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}
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uint32_t useableSize = totalSize - serializedSize;
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//Update the totalSize for calculations
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totalSize = useableSize;
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//True StartAddress
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uint32_t trueStartAddress = indexAddress + serializedSize;
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//Calculate True number of Blocks and reset size of true Number of Blocks
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uint32_t trueNumberOfBlocks = floor(static_cast<double>(totalSize) / static_cast<double>(bytesPerBlock));
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//allocate memory now
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this->entries = new Index<T>[trueNumberOfBlocks];
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this->size = trueNumberOfBlocks;
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this->maxSize_ = trueNumberOfBlocks;
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this->allocated = true;
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//Check trueNumberOfBlocks
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if(trueNumberOfBlocks<1){
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error << "IndexedRingMemory: Invalid Number of Blocks: " << trueNumberOfBlocks;
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}
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//Fill address into index
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uint32_t address = trueStartAddress;
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for (typename IndexedRingMemoryArray<T>::Iterator it = this->begin();it!=this->end();++it) {
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it->setBlockStartAddress(address);
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it->setSize(0);
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it->setStoredPackets(0);
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address += bytesPerBlock;
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}
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//Initialize iterators
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currentWriteBlock = this->begin();
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currentReadBlock = this->begin();
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lastBlockToRead = this->begin();
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//Check last blockSize
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uint32_t lastBlockSize = (trueStartAddress + useableSize) - (this->back()->getBlockStartAddress());
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if((lastBlockSize<bytesPerBlock) && (this->size > 1)){
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//remove the last Block so the second last block has more size
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this->size -= 1;
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debug << "IndexedRingMemory: Last Block is smaller than bytesPerBlock, removed last block" << std::endl;
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}
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}
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/**
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* Resets the whole index, the iterators and executes the given reset function on every index type
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* @param typeResetFnc static reset function which accepts a pointer to the index Type
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*/
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void reset(void (*typeResetFnc)(T*)){
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currentReadBlock = this->begin();
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currentWriteBlock = this->begin();
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lastBlockToRead = this->begin();
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currentReadSize = 0;
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currentReadBlockSizeCached = 0;
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lastBlockToReadSize = 0;
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for(typename IndexedRingMemoryArray<T>::Iterator it = this->begin();it!=this->end();++it){
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it->setSize(0);
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it->setStoredPackets(0);
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(*typeResetFnc)(it->modifyIndexType());
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}
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}
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void resetBlock(typename IndexedRingMemoryArray<T>::Iterator it,void (*typeResetFnc)(T*)){
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it->setSize(0);
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it->setStoredPackets(0);
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(*typeResetFnc)(it->modifyIndexType());
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}
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/*
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* Reading
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*/
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void setCurrentReadBlock(typename IndexedRingMemoryArray<T>::Iterator it){
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currentReadBlock = it;
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currentReadBlockSizeCached = it->getSize();
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}
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void resetRead(){
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currentReadBlock = this->begin();
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currentReadSize = 0;
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currentReadBlockSizeCached = this->begin()->getSize();
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lastBlockToRead = currentWriteBlock;
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lastBlockToReadSize = currentWriteBlock->getSize();
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}
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/**
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* Sets the last block to read to this iterator.
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* Can be used to dump until block x
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* @param it The iterator for the last read block
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*/
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void setLastBlockToRead(typename IndexedRingMemoryArray<T>::Iterator it){
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lastBlockToRead = it;
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lastBlockToReadSize = it->getSize();
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}
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/**
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* Set the read pointer to the first written Block, which is the first non empty block in front of the write block
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* Can be the currentWriteBlock as well
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*/
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void readOldest(){
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resetRead();
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currentReadBlock = getNextNonEmptyBlock();
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currentReadBlockSizeCached = currentReadBlock->getSize();
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}
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/**
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* Sets the current read iterator to the next Block and resets the current read size
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* The current size of the block will be cached to avoid race condition between write and read
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* If the end of the ring is reached the read pointer will be set to the begin
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*/
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void readNext(){
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currentReadSize = 0;
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if((this->size != 0) && (currentReadBlock.value ==this->back())){
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currentReadBlock = this->begin();
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}else{
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currentReadBlock++;
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}
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currentReadBlockSizeCached = currentReadBlock->getSize();
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}
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/**
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* Returns the address which is currently read from
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* @return Address to read from
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*/
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uint32_t getCurrentReadAddress() const {
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return getAddressOfCurrentReadBlock() + currentReadSize;
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}
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/**
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* Adds readSize to the current size and checks if the read has no more data left and advances the read block
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* @param readSize The size that was read
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* @return Returns true if the read can go on
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*/
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bool addReadSize(uint32_t readSize) {
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if(currentReadBlock == lastBlockToRead){
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//The current read block is the last to read
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if((currentReadSize+readSize)<lastBlockToReadSize){
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//the block has more data -> return true
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currentReadSize += readSize;
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return true;
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}else{
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//Reached end of read -> return false
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currentReadSize = lastBlockToReadSize;
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return false;
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}
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}else{
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//We are not in the last Block
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if((currentReadSize + readSize)<currentReadBlockSizeCached){
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//The current Block has more data
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currentReadSize += readSize;
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return true;
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}else{
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//The current block is written completely
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readNext();
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if(currentReadBlockSizeCached==0){
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//Next block is empty
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typename IndexedRingMemoryArray<T>::Iterator it(currentReadBlock);
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//Search if any block between this and the last block is not empty
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for(;it!=lastBlockToRead;++it){
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if(it == this->end()){
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//This is the end, next block is the begin
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it = this->begin();
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if(it == lastBlockToRead){
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//Break if the begin is the lastBlockToRead
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break;
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}
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}
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if(it->getSize()!=0){
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//This is a non empty block. Go on reading with this block
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currentReadBlock = it;
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currentReadBlockSizeCached = it->getSize();
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return true;
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}
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}
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//reached lastBlockToRead and every block was empty, check if the last block is also empty
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if(lastBlockToReadSize!=0){
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//go on with last Block
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currentReadBlock = lastBlockToRead;
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currentReadBlockSizeCached = lastBlockToReadSize;
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return true;
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}
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//There is no non empty block left
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return false;
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}
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//Size is larger than 0
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return true;
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}
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}
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}
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uint32_t getRemainigSizeOfCurrentReadBlock() const{
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if(currentReadBlock == lastBlockToRead){
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return (lastBlockToReadSize - currentReadSize);
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}else{
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return (currentReadBlockSizeCached - currentReadSize);
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}
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}
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uint32_t getAddressOfCurrentReadBlock() const {
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return currentReadBlock->getBlockStartAddress();
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}
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/**
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* Gets the next non empty Block after the current write block,
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* @return Returns the iterator to the block. If there is non, the current write block is returned
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*/
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typename IndexedRingMemoryArray<T>::Iterator getNextNonEmptyBlock() const {
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for(typename IndexedRingMemoryArray<T>::Iterator it = getNextWrite();it!=currentWriteBlock;++it){
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if(it == this->end()){
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it = this->begin();
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if(it == currentWriteBlock){
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break;
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}
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}
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if(it->getSize()!=0){
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return it;
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}
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}
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return currentWriteBlock;
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}
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/**
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* Returns a copy of the oldest Index type
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* @return Type of Index
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*/
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T* getOldest(){
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return (getNextNonEmptyBlock()->modifyIndexType());
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}
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/*
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* Writing
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*/
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uint32_t getAddressOfCurrentWriteBlock() const{
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return currentWriteBlock->getBlockStartAddress();
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}
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uint32_t getSizeOfCurrentWriteBlock() const{
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return currentWriteBlock->getSize();
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}
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uint32_t getCurrentWriteAddress() const{
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return getAddressOfCurrentWriteBlock() + getSizeOfCurrentWriteBlock();
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}
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void clearCurrentWriteBlock(){
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currentWriteBlock->setSize(0);
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currentWriteBlock->setStoredPackets(0);
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}
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void addCurrentWriteBlock(uint32_t size, uint32_t storedPackets){
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currentWriteBlock->addSize(size);
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currentWriteBlock->addStoredPackets(storedPackets);
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}
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T* modifyCurrentWriteBlockIndexType(){
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return currentWriteBlock->modifyIndexType();
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}
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void updatePreviousWriteSize(uint32_t size, uint32_t storedPackets){
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typename IndexedRingMemoryArray<T>::Iterator it = getPreviousBlock(currentWriteBlock);
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it->addSize(size);
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it->addStoredPackets(storedPackets);
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}
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/**
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* Checks if the block has enough space for sizeToWrite
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* @param sizeToWrite The data to be written in the Block
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* @return Returns true if size to write is smaller the remaining size of the block
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*/
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bool hasCurrentWriteBlockEnoughSpace(uint32_t sizeToWrite){
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typename IndexedRingMemoryArray<T>::Iterator next = getNextWrite();
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uint32_t addressOfNextBlock = next->getBlockStartAddress();
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uint32_t availableSize = ((addressOfNextBlock+totalSize) - (getAddressOfCurrentWriteBlock()+getSizeOfCurrentWriteBlock()))%totalSize;
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return (sizeToWrite < availableSize);
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}
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/**
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* Checks if the store is full if overwrite old is false
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* @return Returns true if it is writeable and false if not
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*/
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bool isNextBlockWritable(){
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//First check if this is the end of the list
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typename IndexedRingMemoryArray<T>::Iterator next;
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next = getNextWrite();
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if((next->getSize()!=0) && (!overwriteOld)){
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return false;
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}
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return true;
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}
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/**
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* Updates current write Block Index Type
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* @param infoOfNewBlock
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*/
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void updateCurrentBlock(T* infoOfNewBlock){
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currentWriteBlock->setIndexType(infoOfNewBlock);
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}
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/**
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* Succeed to next block, returns FAILED if overwrite is false and the store is full
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* @return
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*/
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ReturnValue_t writeNext(){
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//Check Next Block
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if(!isNextBlockWritable()){
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//The Index is full and does not overwrite old
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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//Next block can be written, update Metadata
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currentWriteBlock = getNextWrite();
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currentWriteBlock->setSize(0);
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currentWriteBlock->setStoredPackets(0);
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return HasReturnvaluesIF::RETURN_OK;
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}
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/**
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* Serializes the Index and calculates the CRC.
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* Parameters according to HasSerializeIF
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* @param buffer
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* @param size
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* @param max_size
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* @param bigEndian
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* @return
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*/
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ReturnValue_t serialize(uint8_t** buffer, uint32_t* size,
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const uint32_t max_size, bool bigEndian) const{
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uint8_t* crcBuffer = *buffer;
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uint32_t oldSize = *size;
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if(additionalInfo!=NULL){
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additionalInfo->serialize(buffer,size,max_size,bigEndian);
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}
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ReturnValue_t result = currentWriteBlock->serialize(buffer,size,max_size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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result = SerializeAdapter::serialize(&this->size,buffer,size,max_size,bigEndian);
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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uint32_t i = 0;
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while ((result == HasReturnvaluesIF::RETURN_OK) && (i < this->size)) {
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result = SerializeAdapter::serialize(&this->entries[i], buffer, size,
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max_size, bigEndian);
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++i;
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}
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if(result != HasReturnvaluesIF::RETURN_OK){
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return result;
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}
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uint16_t crc = Calculate_CRC(crcBuffer,(*size-oldSize));
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result = SerializeAdapter::serialize(&crc,buffer,size,max_size,bigEndian);
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return result;
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}
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/**
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* Get the serialized Size of the index
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* @return The serialized size of the index
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*/
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uint32_t getSerializedSize() const {
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|
uint32_t size = 0;
|
|
if(additionalInfo!=NULL){
|
|
size += additionalInfo->getSerializedSize();
|
|
}
|
|
size += currentWriteBlock->getSerializedSize();
|
|
size += SerializeAdapter::getSerializedSize(&this->size);
|
|
size += (this->entries[0].getSerializedSize()) * this->size;
|
|
uint16_t crc = 0;
|
|
size += SerializeAdapter::getSerializedSize(&crc);
|
|
return size;
|
|
}
|
|
/**
|
|
* DeSerialize the Indexed Ring from a buffer, deSerializes the current write iterator
|
|
* CRC Has to be checked before!
|
|
* @param buffer
|
|
* @param size
|
|
* @param bigEndian
|
|
* @return
|
|
*/
|
|
|
|
ReturnValue_t deSerialize(const uint8_t** buffer, int32_t* size,
|
|
bool bigEndian){
|
|
|
|
ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
|
|
if(additionalInfo!=NULL){
|
|
result = additionalInfo->deSerialize(buffer,size,bigEndian);
|
|
}
|
|
if(result != HasReturnvaluesIF::RETURN_OK){
|
|
return result;
|
|
}
|
|
|
|
Index<T> tempIndex;
|
|
result = tempIndex.deSerialize(buffer,size,bigEndian);
|
|
if(result != HasReturnvaluesIF::RETURN_OK){
|
|
return result;
|
|
}
|
|
uint32_t tempSize = 0;
|
|
result = SerializeAdapter::deSerialize(&tempSize,buffer,size,bigEndian);
|
|
if(result != HasReturnvaluesIF::RETURN_OK){
|
|
return result;
|
|
}
|
|
if(this->size != tempSize){
|
|
return HasReturnvaluesIF::RETURN_FAILED;
|
|
}
|
|
uint32_t i = 0;
|
|
while ((result == HasReturnvaluesIF::RETURN_OK) && (i < this->size)) {
|
|
result = SerializeAdapter::deSerialize(
|
|
&this->entries[i], buffer, size,
|
|
bigEndian);
|
|
++i;
|
|
}
|
|
if(result != HasReturnvaluesIF::RETURN_OK){
|
|
return result;
|
|
}
|
|
typename IndexedRingMemoryArray<T>::Iterator cmp(&tempIndex);
|
|
for(typename IndexedRingMemoryArray<T>::Iterator it= this->begin();it!=this->end();++it){
|
|
if(*(cmp.value) == *(it.value)){
|
|
currentWriteBlock = it;
|
|
return HasReturnvaluesIF::RETURN_OK;
|
|
}
|
|
}
|
|
//Reached if current write block iterator is not found
|
|
return HasReturnvaluesIF::RETURN_FAILED;
|
|
}
|
|
|
|
uint32_t getIndexAddress() const {
|
|
return indexAddress;
|
|
}
|
|
|
|
|
|
/*
|
|
* Statistics
|
|
*/
|
|
uint32_t getStoredPackets() const {
|
|
uint32_t size = 0;
|
|
for(typename IndexedRingMemoryArray<T>::Iterator it= this->begin();it!=this->end();++it){
|
|
size += it->getStoredPackets();
|
|
}
|
|
return size;
|
|
}
|
|
|
|
uint32_t getTotalSize() const {
|
|
return totalSize;
|
|
}
|
|
|
|
uint32_t getCurrentSize() const{
|
|
uint32_t size = 0;
|
|
for(typename IndexedRingMemoryArray<T>::Iterator it= this->begin();it!=this->end();++it){
|
|
size += it->getSize();
|
|
}
|
|
return size;
|
|
}
|
|
|
|
bool isEmpty() const{
|
|
return getCurrentSize()==0;
|
|
}
|
|
|
|
double getPercentageFilled() const{
|
|
uint32_t filledSize = 0;
|
|
for(typename IndexedRingMemoryArray<T>::Iterator it= this->begin();it!=this->end();++it){
|
|
filledSize += it->getSize();
|
|
}
|
|
|
|
return (double)filledSize/(double)this->totalSize;
|
|
}
|
|
|
|
typename IndexedRingMemoryArray<T>::Iterator getCurrentWriteBlock() const{
|
|
return currentWriteBlock;
|
|
}
|
|
/**
|
|
* Get the next block of the currentWriteBlock.
|
|
* Returns the first one if currentWriteBlock is the last one
|
|
* @return Iterator pointing to the next block after currentWriteBlock
|
|
*/
|
|
typename IndexedRingMemoryArray<T>::Iterator getNextWrite() const{
|
|
typename IndexedRingMemoryArray<T>::Iterator next(currentWriteBlock);
|
|
if((this->size != 0) && (currentWriteBlock.value == this->back())){
|
|
next = this->begin();
|
|
}else{
|
|
++next;
|
|
}
|
|
return next;
|
|
}
|
|
/**
|
|
* Get the block in front of the Iterator
|
|
* Returns the last block if it is the first block
|
|
* @param it iterator which you want the previous block from
|
|
* @return pointing to the block before it
|
|
*/
|
|
typename IndexedRingMemoryArray<T>::Iterator getPreviousBlock(typename IndexedRingMemoryArray<T>::Iterator it) {
|
|
if(this->begin() == it){
|
|
typename IndexedRingMemoryArray<T>::Iterator next((this->back()));
|
|
return next;
|
|
}
|
|
typename IndexedRingMemoryArray<T>::Iterator next(it);
|
|
--next;
|
|
return next;
|
|
}
|
|
private:
|
|
//The total size used by the blocks (without index)
|
|
uint32_t totalSize;
|
|
|
|
//The address of the index
|
|
const uint32_t indexAddress;
|
|
|
|
//The iterators for writing and reading
|
|
typename IndexedRingMemoryArray<T>::Iterator currentWriteBlock;
|
|
typename IndexedRingMemoryArray<T>::Iterator currentReadBlock;
|
|
|
|
//How much of the current read block is read already
|
|
uint32_t currentReadSize;
|
|
|
|
//Cached Size of current read block
|
|
uint32_t currentReadBlockSizeCached;
|
|
|
|
//Last block of current write (should be write block)
|
|
typename IndexedRingMemoryArray<T>::Iterator lastBlockToRead;
|
|
//current size of last Block to read
|
|
uint32_t lastBlockToReadSize;
|
|
|
|
//Additional Info to be serialized with the index
|
|
SerializeIF* additionalInfo;
|
|
|
|
//Does it overwrite old blocks?
|
|
const bool overwriteOld;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#endif /* FRAMEWORK_CONTAINER_INDEXEDRINGMEMORY_H_ */
|