fsfw/datapoolglob/PoolRawAccess.cpp

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2020-09-06 15:23:38 +02:00
#include "../datapoolglob/GlobalDataPool.h"
#include "../datapoolglob/PoolRawAccess.h"
#include "../serviceinterface/ServiceInterfaceStream.h"
#include "../serialize/EndianConverter.h"
#include <cstring>
PoolRawAccess::PoolRawAccess(uint32_t set_id, uint8_t setArrayEntry,
DataSetIF* dataSet, ReadWriteMode_t setReadWriteMode) :
dataPoolId(set_id), arrayEntry(setArrayEntry), valid(false),
type(Type::UNKNOWN_TYPE), typeSize(0), arraySize(0), sizeTillEnd(0),
readWriteMode(setReadWriteMode) {
memset(value, 0, sizeof(value));
if (dataSet != nullptr) {
dataSet->registerVariable(this);
}
}
PoolRawAccess::~PoolRawAccess() {}
ReturnValue_t PoolRawAccess::read(uint32_t lockTimeout) {
ReturnValue_t result = glob::dataPool.lockDataPool(lockTimeout);
if(result != HasReturnvaluesIF::RETURN_OK) {
return result;
}
result = readWithoutLock();
ReturnValue_t unlockResult = glob::dataPool.unlockDataPool();
if(unlockResult != HasReturnvaluesIF::RETURN_OK) {
sif::error << "GlobPoolVar::read: Could not unlock global data pool"
<< std::endl;
}
return result;
}
ReturnValue_t PoolRawAccess::readWithoutLock() {
ReturnValue_t result = RETURN_FAILED;
PoolEntryIF* readOut = glob::dataPool.getRawData(dataPoolId);
if (readOut != nullptr) {
result = handleReadOut(readOut);
if(result == RETURN_OK) {
return result;
}
} else {
result = READ_ENTRY_NON_EXISTENT;
}
handleReadError(result);
return result;
}
ReturnValue_t PoolRawAccess::handleReadOut(PoolEntryIF* readOut) {
ReturnValue_t result = RETURN_FAILED;
valid = readOut->getValid();
if (readOut->getSize() > arrayEntry) {
arraySize = readOut->getSize();
typeSize = readOut->getByteSize() / readOut->getSize();
type = readOut->getType();
if (typeSize <= sizeof(value)) {
uint16_t arrayPosition = arrayEntry * typeSize;
sizeTillEnd = readOut->getByteSize() - arrayPosition;
uint8_t* ptr = &((uint8_t*) readOut->getRawData())[arrayPosition];
memcpy(value, ptr, typeSize);
return RETURN_OK;
} else {
result = READ_TYPE_TOO_LARGE;
}
} else {
//debug << "PoolRawAccess: Size: " << (int)read_out->getSize() << std::endl;
result = READ_INDEX_TOO_LARGE;
}
return result;
}
void PoolRawAccess::handleReadError(ReturnValue_t result) {
sif::error << "PoolRawAccess: read of DP Variable 0x" << std::hex << dataPoolId
<< std::dec << " failed, ";
if(result == READ_TYPE_TOO_LARGE) {
sif::error << "type too large." << std::endl;
}
else if(result == READ_INDEX_TOO_LARGE) {
sif::error << "index too large." << std::endl;
}
else if(result == READ_ENTRY_NON_EXISTENT) {
sif::error << "entry does not exist." << std::endl;
}
valid = INVALID;
typeSize = 0;
sizeTillEnd = 0;
memset(value, 0, sizeof(value));
}
ReturnValue_t PoolRawAccess::commit(uint32_t lockTimeout) {
ReturnValue_t result = glob::dataPool.lockDataPool(lockTimeout);
if(result != HasReturnvaluesIF::RETURN_OK) {
return result;
}
result = commitWithoutLock();
ReturnValue_t unlockResult = glob::dataPool.unlockDataPool();
if(unlockResult != HasReturnvaluesIF::RETURN_OK) {
sif::error << "GlobPoolVar::read: Could not unlock global data pool"
<< std::endl;
}
return result;
}
ReturnValue_t PoolRawAccess::commitWithoutLock() {
PoolEntryIF* write_back = glob::dataPool.getRawData(dataPoolId);
if ((write_back != NULL) && (readWriteMode != VAR_READ)) {
write_back->setValid(valid);
uint8_t array_position = arrayEntry * typeSize;
uint8_t* ptr = &((uint8_t*) write_back->getRawData())[array_position];
memcpy(ptr, value, typeSize);
return HasReturnvaluesIF::RETURN_OK;
} else {
return HasReturnvaluesIF::RETURN_FAILED;
}
}
uint8_t* PoolRawAccess::getEntry() {
return value;
}
ReturnValue_t PoolRawAccess::getEntryEndianSafe(uint8_t* buffer,
size_t* writtenBytes, size_t max_size) {
uint8_t* data_ptr = getEntry();
// debug << "PoolRawAccess::getEntry: Array position: " <<
// index * size_of_type << " Size of T: " << (int)size_of_type <<
// " ByteSize: " << byte_size << " Position: " << *size << std::endl;
if (typeSize == 0)
return DATA_POOL_ACCESS_FAILED;
if (typeSize > max_size)
return INCORRECT_SIZE;
EndianConverter::convertBigEndian(buffer, data_ptr, typeSize);
*writtenBytes = typeSize;
return HasReturnvaluesIF::RETURN_OK;
}
ReturnValue_t PoolRawAccess::serialize(uint8_t** buffer, size_t* size,
size_t maxSize, Endianness streamEndianness) const {
if (typeSize + *size <= maxSize) {
switch(streamEndianness) {
case(Endianness::BIG):
EndianConverter::convertBigEndian(*buffer, value, typeSize);
break;
case(Endianness::LITTLE):
EndianConverter::convertLittleEndian(*buffer, value, typeSize);
break;
case(Endianness::MACHINE):
default:
memcpy(*buffer, value, typeSize);
break;
}
*size += typeSize;
(*buffer) += typeSize;
return HasReturnvaluesIF::RETURN_OK;
} else {
return SerializeIF::BUFFER_TOO_SHORT;
}
}
Type PoolRawAccess::getType() {
return type;
}
size_t PoolRawAccess::getSizeOfType() {
return typeSize;
}
size_t PoolRawAccess::getArraySize(){
return arraySize;
}
uint32_t PoolRawAccess::getDataPoolId() const {
return dataPoolId;
}
PoolVariableIF::ReadWriteMode_t PoolRawAccess::getReadWriteMode() const {
return readWriteMode;
}
ReturnValue_t PoolRawAccess::setEntryFromBigEndian(const uint8_t *buffer,
size_t setSize) {
if (typeSize == setSize) {
EndianConverter::convertBigEndian(value, buffer, typeSize);
return HasReturnvaluesIF::RETURN_OK;
} else {
sif::error << "PoolRawAccess::setEntryFromBigEndian: Illegal sizes: "
"Internal" << (uint32_t) typeSize << ", Requested: " << setSize
<< std::endl;
return INCORRECT_SIZE;
}
}
bool PoolRawAccess::isValid() const {
if (valid != INVALID)
return true;
else
return false;
}
void PoolRawAccess::setValid(bool valid) {
this->valid = valid;
}
size_t PoolRawAccess::getSizeTillEnd() const {
return sizeTillEnd;
}
size_t PoolRawAccess::getSerializedSize() const {
return typeSize;
}
ReturnValue_t PoolRawAccess::deSerialize(const uint8_t **buffer, size_t *size,
Endianness streamEndianness) {
if (*size >= typeSize) {
switch(streamEndianness) {
case(Endianness::BIG):
EndianConverter::convertBigEndian(value, *buffer, typeSize);
break;
case(Endianness::LITTLE):
EndianConverter::convertLittleEndian(value, *buffer, typeSize);
break;
case(Endianness::MACHINE):
default:
memcpy(value, *buffer, typeSize);
break;
}
*size -= typeSize;
*buffer += typeSize;
return HasReturnvaluesIF::RETURN_OK;
}
else {
return SerializeIF::STREAM_TOO_SHORT;
}
}