pool raw access helper
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datapool/PoolRawAccessHelper.cpp
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169
datapool/PoolRawAccessHelper.cpp
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/**
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* @file PoolRawAccessHelper.cpp
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*
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* @date 22.12.2019
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* @author R. Mueller
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*/
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#include <framework/datapool/PoolRawAccessHelper.h>
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#include <cmath>
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#include <framework/datapool/DataSet.h>
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PoolRawAccessHelper::PoolRawAccessHelper(uint32_t * poolIdBuffer_,
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uint8_t numberOfParameters_):
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poolIdBuffer(reinterpret_cast<uint8_t * >(poolIdBuffer_)),
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numberOfParameters(numberOfParameters_), validBufferIndex(0),
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validBufferIndexBit(1) {
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}
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PoolRawAccessHelper::~PoolRawAccessHelper() {
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}
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ReturnValue_t PoolRawAccessHelper::serialize(uint8_t **buffer, size_t *size,
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const size_t max_size, bool bigEndian) {
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SerializationArgs serializationArgs = {buffer, size, max_size, bigEndian};
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ReturnValue_t result;
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ssize_t remainingParametersSize = numberOfParameters * 4;
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for(uint8_t count=0; count < numberOfParameters; count++) {
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result = serializeCurrentPoolEntryIntoBuffer(serializationArgs,
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&remainingParametersSize, false);
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if(result != RETURN_OK) {
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return result;
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}
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}
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if(remainingParametersSize != 0) {
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debug << "Pool Raw Access: Remaining parameters size not 0 !" << std::endl;
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result = RETURN_FAILED;
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}
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return result;
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}
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ReturnValue_t PoolRawAccessHelper::serializeWithValidityMask(uint8_t ** buffer,
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size_t * size, const size_t max_size, bool bigEndian) {
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ReturnValue_t result;
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SerializationArgs argStruct = {buffer, size, max_size, bigEndian};
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ssize_t remainingParametersSize = numberOfParameters * 4;
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uint8_t validityMaskSize = ceil((float)numberOfParameters/8.0);
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uint8_t validityMask[validityMaskSize];
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memset(validityMask,0, validityMaskSize);
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for(uint8_t count = 0; count < numberOfParameters; count++) {
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result = serializeCurrentPoolEntryIntoBuffer(argStruct,
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&remainingParametersSize,true,validityMask);
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if (result != RETURN_OK) {
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return result;
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}
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}
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if(remainingParametersSize != 0) {
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debug << "Pool Raw Access: Remaining parameters size not 0 !" << std::endl;
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result = RETURN_FAILED;
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}
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memcpy(*argStruct.buffer, validityMask, validityMaskSize);
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*size += validityMaskSize;
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validBufferIndex = 1;
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validBufferIndexBit = 0;
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return result;
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}
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ReturnValue_t PoolRawAccessHelper::serializeCurrentPoolEntryIntoBuffer(SerializationArgs argStruct,
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ssize_t * remainingParameters, bool withValidMask, uint8_t * validityMask) {
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uint32_t currentPoolId;
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// Deserialize current pool ID from pool ID buffer
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ReturnValue_t result = AutoSerializeAdapter::deSerialize(¤tPoolId,
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&poolIdBuffer,remainingParameters,true);
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if(result != RETURN_OK) {
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debug << std::hex << "Pool Raw Access Helper: Error deSeralizing pool IDs" << std::dec << std::endl;
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return result;
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}
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result = handlePoolEntrySerialization(currentPoolId, argStruct, withValidMask, validityMask);
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return result;
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}
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ReturnValue_t PoolRawAccessHelper::handlePoolEntrySerialization(uint32_t currentPoolId,SerializationArgs argStruct,
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bool withValidMask, uint8_t * validityMask) {
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ReturnValue_t result = RETURN_FAILED;
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uint8_t arrayPosition = 0;
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uint8_t counter = 0;
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bool poolEntrySerialized = false;
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//debug << "Pool Raw Access Helper: Handling Pool ID: " << std::hex << currentPoolId << std::endl;
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while(not poolEntrySerialized) {
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if(counter > DataSet::DATA_SET_MAX_SIZE) {
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error << "Pool Raw Access Helper: Config error, max. number of possible data set variables exceeded" << std::endl;
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return result;
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}
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counter ++;
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DataSet currentDataSet = DataSet();
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//debug << "Current array position: " << (int)arrayPosition << std::endl;
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PoolRawAccess currentPoolRawAccess(currentPoolId,arrayPosition,¤tDataSet,PoolVariableIF::VAR_READ);
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result = currentDataSet.read();
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if (result != RETURN_OK) {
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debug << std::hex << "Pool Raw Access Helper: Error reading raw dataset with returncode 0x"
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<< result << std::dec << std::endl;
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return result;
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}
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result = checkRemainingSize(¤tPoolRawAccess, &poolEntrySerialized, &arrayPosition);
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if(result != RETURN_OK) {
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error << "Pool Raw Access Helper: Configuration Error at pool ID " << std::hex << currentPoolId
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<< ". Size till end smaller than 0" << std::dec << std::endl;
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return result;
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}
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// set valid mask bit if necessary
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if(withValidMask) {
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if(currentPoolRawAccess.isValid()) {
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handleMaskModification(validityMask);
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}
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validBufferIndexBit ++;
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}
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result = currentDataSet.serialize(argStruct.buffer, argStruct.size,
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argStruct.max_size, argStruct.bigEndian);
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if (result != RETURN_OK) {
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debug << "Pool Raw Access Helper: Error serializing pool data with ID 0x" << std::hex <<
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currentPoolId << " into send buffer with return code " << result << std::dec << std::endl;
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return result;
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}
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}
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return result;
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}
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ReturnValue_t PoolRawAccessHelper::checkRemainingSize(PoolRawAccess * currentPoolRawAccess,
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bool * isSerialized, uint8_t * arrayPosition) {
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int8_t remainingSize = currentPoolRawAccess->getSizeTillEnd() - currentPoolRawAccess->getSizeOfType();
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if(remainingSize == 0) {
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*isSerialized = true;
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}
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else if(remainingSize > 0) {
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*arrayPosition += 1;
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}
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else {
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return RETURN_FAILED;
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}
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return RETURN_OK;
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}
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void PoolRawAccessHelper::handleMaskModification(uint8_t * validityMask) {
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validityMask[validBufferIndex] =
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bitSetter(validityMask[validBufferIndex], validBufferIndexBit, true);
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if(validBufferIndexBit == 8) {
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validBufferIndex ++;
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validBufferIndexBit = 1;
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}
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}
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uint8_t PoolRawAccessHelper::bitSetter(uint8_t byte, uint8_t position, bool value) {
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if(position < 1 or position > 8) {
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debug << "Pool Raw Access: Bit setting invalid position" << std::endl;
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return byte;
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}
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uint8_t shiftNumber = position + (6 - 2 * (position - 1));
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byte |= 1UL << shiftNumber;
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return byte;
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}
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108
datapool/PoolRawAccessHelper.h
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108
datapool/PoolRawAccessHelper.h
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@ -0,0 +1,108 @@
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/**
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* @file PoolRawAccessHelper.h
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*
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* @date 22.12.2019
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*/
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#ifndef FRAMEWORK_DATAPOOL_POOLRAWACCESSHELPER_H_
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#define FRAMEWORK_DATAPOOL_POOLRAWACCESSHELPER_H_
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#include <framework/returnvalues/HasReturnvaluesIF.h>
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#include <framework/datapool/DataSet.h>
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/**
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* @brief This helper function simplifies accessing data pool entries
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* via PoolRawAccess
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* @details Can be used for a Housekeeping Service
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* like ECSS PUS Service 3 if the type of the datapool entries is unknown.
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* The provided dataset can be serialized into a provided buffer automatically by
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* providing a buffer of pool IDs
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* @ingroup data_pool
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*/
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class PoolRawAccessHelper: public HasReturnvaluesIF {
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public:
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/**
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* Call this constructor if a dataset needs to be serialized via
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* Pool Raw Access
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* @param dataSet_ This dataset will be used to perform thread-safe reading
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* @param poolIdBuffer_ A buffer of uint32_t pool IDs
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* @param numberOfParameters_ The number of parameters / pool IDs
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*/
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PoolRawAccessHelper(uint32_t * poolIdBuffer_, uint8_t numberOfParameters_);
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virtual ~PoolRawAccessHelper();
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/**
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* Serialize the datapool entries derived from the pool ID buffer
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* directly into a provided buffer
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* @param [out] buffer
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* @param [out] size Size of the serialized buffer
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* @param max_size
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* @param bigEndian
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* @return @c RETURN_OK On success
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* @c RETURN_FAILED on failure
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*/
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ReturnValue_t serialize(uint8_t ** buffer, size_t * size,
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const size_t max_size, bool bigEndian);
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/**
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* Serializes data pool entries into provided buffer with the validity mask buffer
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* at the end of the buffer. Every bit of the validity mask denotes
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* the validity of a corresponding data pool entry from left to right.
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* @param [out] buffer
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* @param [out] size Size of the serialized buffer plus size
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* of the validity mask
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* @return @c RETURN_OK On success
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* @c RETURN_FAILED on failure
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*/
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ReturnValue_t serializeWithValidityMask(uint8_t ** buffer, size_t * size,
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const size_t max_size, bool bigEndian);
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private:
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// DataSet * dataSet;
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const uint8_t * poolIdBuffer;
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uint8_t numberOfParameters;
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uint8_t validBufferIndex;
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uint8_t validBufferIndexBit;
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struct SerializationArgs {
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uint8_t ** buffer;
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size_t * size;
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const uint32_t max_size;
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bool bigEndian;
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};
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/**
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* Helper function to serialize single pool entries
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* @param pPoolIdBuffer
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* @param buffer
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* @param remainingParameters
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* @param hkDataSize
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* @param max_size
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* @param bigEndian
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* @param withValidMask Can be set optionally to set a provided validity mask
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* @param validityMask Can be supplied and will be set if @c withValidMask is set to true
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* @return
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*/
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ReturnValue_t serializeCurrentPoolEntryIntoBuffer(SerializationArgs argStruct,
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ssize_t * remainingParameters, bool withValidMask = false,
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uint8_t * validityMask = nullptr);
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ReturnValue_t handlePoolEntrySerialization(uint32_t currentPoolId,
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SerializationArgs argStruct, bool withValidMask = false,
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uint8_t * validityMask = nullptr);
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ReturnValue_t checkRemainingSize(PoolRawAccess * currentPoolRawAccess,
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bool * isSerialized, uint8_t * arrayPosition);
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void handleMaskModification(uint8_t * validityMask);
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/**
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* Sets specific bit of a byte
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* @param byte
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* @param position Position of byte to set from 1 to 8
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* @param value Binary value to set
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* @return
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*/
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uint8_t bitSetter(uint8_t byte, uint8_t position, bool value);
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};
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#endif /* FRAMEWORK_DATAPOOL_POOLRAWACCESSHELPER_H_ */
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