From 4c59b043e13aa8f21949d9adf9662e75ecb98611 Mon Sep 17 00:00:00 2001 From: "Robin.Mueller" Date: Tue, 23 Jun 2020 10:57:14 +0200 Subject: [PATCH] const store accessor in separate file now --- storagemanager/ConstStoreAccessor.cpp | 93 +++++++++++++++++++++ storagemanager/ConstStoreAccessor.h | 116 ++++++++++++++++++++++++++ storagemanager/StorageAccessor.cpp | 98 ++-------------------- storagemanager/StorageAccessor.h | 109 +----------------------- 4 files changed, 215 insertions(+), 201 deletions(-) create mode 100644 storagemanager/ConstStoreAccessor.cpp create mode 100644 storagemanager/ConstStoreAccessor.h diff --git a/storagemanager/ConstStoreAccessor.cpp b/storagemanager/ConstStoreAccessor.cpp new file mode 100644 index 00000000..84f40053 --- /dev/null +++ b/storagemanager/ConstStoreAccessor.cpp @@ -0,0 +1,93 @@ +#include +#include +#include + +ConstStorageAccessor::ConstStorageAccessor(store_address_t storeId): + storeId(storeId) {} + +ConstStorageAccessor::ConstStorageAccessor(store_address_t storeId, + StorageManagerIF* store): + storeId(storeId), store(store) { + internalState = AccessState::ASSIGNED; +} + +ConstStorageAccessor::~ConstStorageAccessor() { + if(deleteData and store != nullptr) { + sif::debug << "deleting store data" << std::endl; + store->deleteData(storeId); + } +} + +ConstStorageAccessor::ConstStorageAccessor(ConstStorageAccessor&& other): + constDataPointer(other.constDataPointer), storeId(other.storeId), + size_(other.size_), store(other.store), deleteData(other.deleteData), + internalState(other.internalState) { + // This prevent premature deletion + other.store = nullptr; +} + +ConstStorageAccessor& ConstStorageAccessor::operator=( + ConstStorageAccessor&& other) { + constDataPointer = other.constDataPointer; + storeId = other.storeId; + store = other.store; + size_ = other.size_; + deleteData = other.deleteData; + this->store = other.store; + // This prevents premature deletion + other.store = nullptr; + return *this; +} + +const uint8_t* ConstStorageAccessor::data() const { + return constDataPointer; +} + +size_t ConstStorageAccessor::size() const { + if(internalState == AccessState::UNINIT) { + sif::warning << "StorageAccessor: Not initialized!" << std::endl; + } + return size_; +} + +ReturnValue_t ConstStorageAccessor::getDataCopy(uint8_t *pointer, + size_t maxSize) { + if(internalState == AccessState::UNINIT) { + sif::warning << "StorageAccessor: Not initialized!" << std::endl; + return HasReturnvaluesIF::RETURN_FAILED; + } + if(size_ > maxSize) { + sif::error << "StorageAccessor: Supplied buffer not large enough" << std::endl; + return HasReturnvaluesIF::RETURN_FAILED; + } + std::copy(constDataPointer, constDataPointer + size_, pointer); + return HasReturnvaluesIF::RETURN_OK; +} + +void ConstStorageAccessor::release() { + deleteData = false; +} + +store_address_t ConstStorageAccessor::getId() const { + return storeId; +} + +void ConstStorageAccessor::print() const { + if(internalState == AccessState::UNINIT) { + sif::warning << "StorageAccessor: Not initialized!" << std::endl; + return; + } + sif::info << "StorageAccessor: Printing data: ["; + for(uint16_t iPool = 0; iPool < size_; iPool++) { + sif::info << std::hex << (int)constDataPointer[iPool]; + if(iPool < size_ - 1){ + sif::info << " , "; + } + } + sif::info << " ] " << std::endl; +} + +void ConstStorageAccessor::assignStore(StorageManagerIF* store) { + internalState = AccessState::ASSIGNED; + this->store = store; +} diff --git a/storagemanager/ConstStoreAccessor.h b/storagemanager/ConstStoreAccessor.h new file mode 100644 index 00000000..2420893c --- /dev/null +++ b/storagemanager/ConstStoreAccessor.h @@ -0,0 +1,116 @@ +#ifndef FRAMEWORK_STORAGEMANAGER_CONSTSTOREACCESSOR_H_ +#define FRAMEWORK_STORAGEMANAGER_CONSTSTOREACCESSOR_H_ + +#include +#include +#include + +class StorageManagerIF; + +/** + * @brief Helper classes to facilitate safe access to storages which is also + * conforming to RAII principles + * @details + * Accessor class which can be returned by pool manager or passed and set by + * pool managers to have safe access to the pool resources. + * + * These helper can be used together with the StorageManager classes to manage + * access to a storage. It can take care of thread-safety while also providing + * mechanisms to automatically clear storage data. + */ +class ConstStorageAccessor { + //! StorageManager classes have exclusive access to private variables. + template + friend class PoolManager; + template + friend class LocalPool; +public: + /** + * @brief Simple constructor which takes the store ID of the storage + * entry to access. + * @param storeId + */ + ConstStorageAccessor(store_address_t storeId); + ConstStorageAccessor(store_address_t storeId, StorageManagerIF* store); + + /** + * @brief The destructor in default configuration takes care of + * deleting the accessed pool entry and unlocking the mutex + */ + virtual ~ConstStorageAccessor(); + + /** + * @brief Returns a pointer to the read-only data + * @return + */ + const uint8_t* data() const; + + /** + * @brief Copies the read-only data to the supplied pointer + * @param pointer + */ + virtual ReturnValue_t getDataCopy(uint8_t *pointer, size_t maxSize); + + /** + * @brief Calling this will prevent the Accessor from deleting the data + * when the destructor is called. + */ + void release(); + + /** + * Get the size of the data + * @return + */ + size_t size() const; + + /** + * Get the storage ID. + * @return + */ + store_address_t getId() const; + + void print() const; + + /** + * @brief Move ctor and move assignment allow returning accessors as + * a returnvalue. They prevent resource being free prematurely. + * Refer to: https://github.com/MicrosoftDocs/cpp-docs/blob/master/docs/cpp/ + * move-constructors-and-move-assignment-operators-cpp.md + * @param + * @return + */ + ConstStorageAccessor& operator= (ConstStorageAccessor&&); + ConstStorageAccessor (ConstStorageAccessor&&); + + //! The copy ctor and copy assignemnt should be deleted implicitely + //! according to https://foonathan.net/2019/02/special-member-functions/ + //! but I still deleted them to make it more explicit. (remember rule of 5). + ConstStorageAccessor& operator= (ConstStorageAccessor&) = delete; + ConstStorageAccessor (ConstStorageAccessor&) = delete; +protected: + const uint8_t* constDataPointer = nullptr; + store_address_t storeId; + size_t size_ = 0; + //! Managing pool, has to assign itself. + StorageManagerIF* store = nullptr; + bool deleteData = true; + + enum class AccessState { + UNINIT, + ASSIGNED + }; + //! Internal state for safety reasons. + AccessState internalState = AccessState::UNINIT; + /** + * Used by the pool manager instances to assign themselves to the + * accessor. This is necessary to delete the data when the acessor + * exits the scope ! The internal state will be considered read + * when this function is called, so take care all data is set properly as + * well. + * @param + */ + void assignStore(StorageManagerIF*); +}; + + +#endif /* FRAMEWORK_STORAGEMANAGER_CONSTSTOREACCESSOR_H_ */ diff --git a/storagemanager/StorageAccessor.cpp b/storagemanager/StorageAccessor.cpp index c0c8126b..b827b9c0 100644 --- a/storagemanager/StorageAccessor.cpp +++ b/storagemanager/StorageAccessor.cpp @@ -1,96 +1,6 @@ #include #include - -ConstStorageAccessor::ConstStorageAccessor(store_address_t storeId): - storeId(storeId) {} - -ConstStorageAccessor::ConstStorageAccessor(store_address_t storeId, - StorageManagerIF* store): - storeId(storeId), store(store) { - internalState = AccessState::ASSIGNED; -} - -ConstStorageAccessor::~ConstStorageAccessor() { - if(deleteData and store != nullptr) { - sif::debug << "deleting store data" << std::endl; - store->deleteData(storeId); - } -} - -ConstStorageAccessor::ConstStorageAccessor(ConstStorageAccessor&& other): - constDataPointer(other.constDataPointer), storeId(other.storeId), - size_(other.size_), store(other.store), deleteData(other.deleteData), - internalState(other.internalState) { - // This prevent premature deletion - other.store = nullptr; -} - -ConstStorageAccessor& ConstStorageAccessor::operator=( - ConstStorageAccessor&& other) { - constDataPointer = other.constDataPointer; - storeId = other.storeId; - store = other.store; - size_ = other.size_; - deleteData = other.deleteData; - this->store = other.store; - // This prevents premature deletion - other.store = nullptr; - return *this; -} - -const uint8_t* ConstStorageAccessor::data() const { - return constDataPointer; -} - -size_t ConstStorageAccessor::size() const { - if(internalState == AccessState::UNINIT) { - sif::warning << "StorageAccessor: Not initialized!" << std::endl; - } - return size_; -} - -ReturnValue_t ConstStorageAccessor::getDataCopy(uint8_t *pointer, - size_t maxSize) { - if(internalState == AccessState::UNINIT) { - sif::warning << "StorageAccessor: Not initialized!" << std::endl; - return HasReturnvaluesIF::RETURN_FAILED; - } - if(size_ > maxSize) { - sif::error << "StorageAccessor: Supplied buffer not large enough" << std::endl; - return HasReturnvaluesIF::RETURN_FAILED; - } - std::copy(constDataPointer, constDataPointer + size_, pointer); - return HasReturnvaluesIF::RETURN_OK; -} - -void ConstStorageAccessor::release() { - deleteData = false; -} - -store_address_t ConstStorageAccessor::getId() const { - return storeId; -} - -void ConstStorageAccessor::print() const { - if(internalState == AccessState::UNINIT) { - sif::warning << "StorageAccessor: Not initialized!" << std::endl; - return; - } - sif::info << "StorageAccessor: Printing data: ["; - for(uint16_t iPool = 0; iPool < size_; iPool++) { - sif::info << std::hex << (int)constDataPointer[iPool]; - if(iPool < size_ - 1){ - sif::info << " , "; - } - } - sif::info << " ] " << std::endl; -} - -void ConstStorageAccessor::assignStore(StorageManagerIF* store) { - internalState = AccessState::ASSIGNED; - this->store = store; -} - +#include StorageAccessor::StorageAccessor(store_address_t storeId): ConstStorageAccessor(storeId) { @@ -120,7 +30,8 @@ ReturnValue_t StorageAccessor::getDataCopy(uint8_t *pointer, size_t maxSize) { return HasReturnvaluesIF::RETURN_FAILED; } if(size_ > maxSize) { - sif::error << "StorageAccessor: Supplied buffer not large enough" << std::endl; + sif::error << "StorageAccessor: Supplied buffer not large " + "enough" << std::endl; return HasReturnvaluesIF::RETURN_FAILED; } std::copy(dataPointer, dataPointer + size_, pointer); @@ -141,7 +52,8 @@ ReturnValue_t StorageAccessor::write(uint8_t *data, size_t size, return HasReturnvaluesIF::RETURN_FAILED; } if(offset + size > size_) { - sif::error << "StorageAccessor: Data too large for pool entry!" << std::endl; + sif::error << "StorageAccessor: Data too large for pool " + "entry!" << std::endl; return HasReturnvaluesIF::RETURN_FAILED; } std::copy(data, data + size, dataPointer + offset); diff --git a/storagemanager/StorageAccessor.h b/storagemanager/StorageAccessor.h index 57c9369c..bcefe24d 100644 --- a/storagemanager/StorageAccessor.h +++ b/storagemanager/StorageAccessor.h @@ -1,117 +1,10 @@ #ifndef FRAMEWORK_STORAGEMANAGER_STORAGEACCESSOR_H_ #define FRAMEWORK_STORAGEMANAGER_STORAGEACCESSOR_H_ -#include -#include +#include class StorageManagerIF; -/** - * @brief Helper classes to facilitate safe access to storages which is also - * conforming to RAII principles - * @details - * Accessor class which can be returned by pool manager or passed and set by - * pool managers to have safe access to the pool resources. - * - * These helper can be used together with the StorageManager classes to manage - * access to a storage. It can take care of thread-safety while also providing - * mechanisms to automatically clear storage data. - */ -class ConstStorageAccessor { - //! StorageManager classes have exclusive access to private variables. - template - friend class PoolManager; - template - friend class LocalPool; -public: - /** - * @brief Simple constructor which takes the store ID of the storage - * entry to access. - * @param storeId - */ - ConstStorageAccessor(store_address_t storeId); - ConstStorageAccessor(store_address_t storeId, StorageManagerIF* store); - - /** - * @brief The destructor in default configuration takes care of - * deleting the accessed pool entry and unlocking the mutex - */ - virtual ~ConstStorageAccessor(); - - /** - * @brief Returns a pointer to the read-only data - * @return - */ - const uint8_t* data() const; - - /** - * @brief Copies the read-only data to the supplied pointer - * @param pointer - */ - virtual ReturnValue_t getDataCopy(uint8_t *pointer, size_t maxSize); - - /** - * @brief Calling this will prevent the Accessor from deleting the data - * when the destructor is called. - */ - void release(); - - /** - * Get the size of the data - * @return - */ - size_t size() const; - - /** - * Get the storage ID. - * @return - */ - store_address_t getId() const; - - void print() const; - - /** - * @brief Move ctor and move assignment allow returning accessors as - * a returnvalue. They prevent resource being free prematurely. - * Refer to: https://github.com/MicrosoftDocs/cpp-docs/blob/master/docs/cpp/ - * move-constructors-and-move-assignment-operators-cpp.md - * @param - * @return - */ - ConstStorageAccessor& operator= (ConstStorageAccessor&&); - ConstStorageAccessor (ConstStorageAccessor&&); - - //! The copy ctor and copy assignemnt should be deleted implicitely - //! according to https://foonathan.net/2019/02/special-member-functions/ - //! but I still deleted them to make it more explicit. (remember rule of 5). - ConstStorageAccessor& operator= (ConstStorageAccessor&) = delete; - ConstStorageAccessor (ConstStorageAccessor&) = delete; -protected: - const uint8_t* constDataPointer = nullptr; - store_address_t storeId; - size_t size_ = 0; - //! Managing pool, has to assign itself. - StorageManagerIF* store = nullptr; - bool deleteData = true; - - enum class AccessState { - UNINIT, - ASSIGNED - }; - //! Internal state for safety reasons. - AccessState internalState = AccessState::UNINIT; - /** - * Used by the pool manager instances to assign themselves to the - * accessor. This is necessary to delete the data when the acessor - * exits the scope ! The internal state will be considered read - * when this function is called, so take care all data is set properly as - * well. - * @param - */ - void assignStore(StorageManagerIF*); -}; - - /** * @brief Child class for modifyable data. Also has a normal pointer member. */