fsfw/storagemanager/StorageManagerIF.h

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#ifndef STORAGEMANAGERIF_H_H
#define STORAGEMANAGERIF_H_H
#include <framework/events/Event.h>
#include <framework/returnvalues/HasReturnvaluesIF.h>
#include <stddef.h>
/**
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* This union defines the type that identifies where a data packet is
* stored in the store. It comprises of a raw part to read it as raw value and
* a structured part to use it in pool-like stores.
*/
union store_address_t {
/**
* Default Constructor, initializing to INVALID_ADDRESS
*/
store_address_t():raw(0xFFFFFFFF){}
/**
* Constructor to create an address object using the raw address
*
* @param rawAddress
*/
store_address_t(uint32_t rawAddress):raw(rawAddress){}
/**
* Constructor to create an address object using pool
* and packet indices
*
* @param poolIndex
* @param packetIndex
*/
store_address_t(uint16_t poolIndex, uint16_t packetIndex):
pool_index(poolIndex),packet_index(packetIndex){}
/**
* A structure with two elements to access the store address pool-like.
*/
struct {
/**
* The index in which pool the packet lies.
*/
uint16_t pool_index;
/**
* The position in the chosen pool.
*/
uint16_t packet_index;
};
/**
* Alternative access to the raw value.
*/
uint32_t raw;
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bool operator==(const store_address_t& other) const {
return raw == other.raw;
}
};
/**
* @brief This class provides an interface for intermediate data storage.
* @details The Storage manager classes shall be used to store larger chunks of
* data in RAM for exchange between tasks. This interface expects the
* data to be stored in one consecutive block of memory, so tasks can
* write directly to the destination pointer.
* For interprocess communication, the stores must be locked during
* insertion and deletion. If the receiving storage identifier is
* passed token-like between tasks, a lock during read and write
* operations is not necessary.
* @author Bastian Baetz
* @date 18.09.2012
*/
class StorageManagerIF : public HasReturnvaluesIF {
public:
static const uint8_t INTERFACE_ID = CLASS_ID::STORAGE_MANAGER_IF; //!< The unique ID for return codes for this interface.
static const ReturnValue_t DATA_TOO_LARGE = MAKE_RETURN_CODE(1); //!< This return code indicates that the data to be stored is too large for the store.
static const ReturnValue_t DATA_STORAGE_FULL = MAKE_RETURN_CODE(2); //!< This return code indicates that a data storage is full.
static const ReturnValue_t ILLEGAL_STORAGE_ID = MAKE_RETURN_CODE(3); //!< This return code indicates that data was requested with an illegal storage ID.
static const ReturnValue_t DATA_DOES_NOT_EXIST = MAKE_RETURN_CODE(4); //!< This return code indicates that the requested ID was valid, but no data is stored there.
static const ReturnValue_t ILLEGAL_ADDRESS = MAKE_RETURN_CODE(5);
static const uint8_t SUBSYSTEM_ID = SUBSYSTEM_ID::OBSW;
static const Event GET_DATA_FAILED = MAKE_EVENT(0, SEVERITY::LOW);
static const Event STORE_DATA_FAILED = MAKE_EVENT(1, SEVERITY::LOW);
static const uint32_t INVALID_ADDRESS = 0xFFFFFFFF; //!< Indicates an invalid (i.e unused) storage address.
/**
* @brief This is the empty virtual destructor as required for C++ interfaces.
*/
virtual ~StorageManagerIF() {
}
;
/**
* @brief With addData, a free storage position is allocated and data
* stored there.
* @details During the allocation, the StorageManager is blocked.
* @param storageId A pointer to the storageId to retrieve.
* @param data The data to be stored in the StorageManager.
* @param size The amount of data to be stored.
* @return Returns @li RETURN_OK if data was added.
* @li RETURN_FAILED if data could not be added.
* storageId is unchanged then.
*/
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virtual ReturnValue_t addData(store_address_t* storageId,
const uint8_t * data, size_t size, bool ignoreFault = false) = 0;
/**
* @brief With deleteData, the storageManager frees the memory region
* identified by packet_id.
* @param packet_id The identifier of the memory region to be freed.
* @return @li RETURN_OK on success.
* @li RETURN_FAILED if deletion did not work
* (e.g. an illegal packet_id was passed).
*/
virtual ReturnValue_t deleteData(store_address_t packet_id) = 0;
/**
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* @brief Another deleteData which uses the pointer and size of the
* stored data to delete the content.
* @param buffer Pointer to the data.
* @param size Size of data to be stored.
* @param storeId Store id of the deleted element (optional)
* @return @li RETURN_OK on success.
* @li failure code if deletion did not work
*/
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virtual ReturnValue_t deleteData(uint8_t* buffer, size_t size,
store_address_t* storeId = nullptr) = 0;
/**
* @brief getData returns an address to data and the size of the data
* for a given packet_id.
* @param packet_id The id of the data to be returned
* @param packet_ptr The passed pointer address is set to the the memory
* position
* @param size The exact size of the stored data is returned here.
* @return @li RETURN_OK on success.
* @li RETURN_FAILED if fetching data did not work
* (e.g. an illegal packet_id was passed).
*/
virtual ReturnValue_t getData(store_address_t packet_id,
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const uint8_t** packet_ptr, size_t* size) = 0;
/**
* Same as above, but not const and therefore modifiable.
*/
virtual ReturnValue_t modifyData(store_address_t packet_id,
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uint8_t** packet_ptr, size_t* size) = 0;
/**
* This method reserves an element of \c size.
*
* It returns the packet id of this element as well as a direct pointer to the
* data of the element. It must be assured that exactly \c size data is
* written to p_data!
* @param storageId A pointer to the storageId to retrieve.
* @param size The size of the space to be reserved.
* @param p_data A pointer to the element data is returned here.
* @return Returns @li RETURN_OK if data was added.
* @li RETURN_FAILED if data could not be added.
* storageId is unchanged then.
*/
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virtual ReturnValue_t getFreeElement(store_address_t* storageId,
const size_t size, uint8_t** p_data, bool ignoreFault = false ) = 0;
/**
* Clears the whole store.
* Use with care!
*/
virtual void clearStore() = 0;
};
#endif /* STORAGEMANAGERIF_H_ */