fsfw/datapool/PoolVariableIF.h
2020-08-08 12:51:31 +02:00

100 lines
3.2 KiB
C++

#ifndef FRAMEWORK_DATAPOOL_POOLVARIABLEIF_H_
#define FRAMEWORK_DATAPOOL_POOLVARIABLEIF_H_
#include <framework/returnvalues/HasReturnvaluesIF.h>
#include <framework/serialize/SerializeIF.h>
/**
* @brief This interface is used to control data pool
* variable representations.
* @details
* To securely handle data pool variables, all pool entries are locally
* managed by data pool variable access classes, which are called pool
* variables. To ensure a common state of a set of variables needed in a
* function, these local pool variables again are managed by other classes,
* like the DataSet classes. This interface provides unified access to
* local pool variables for such manager classes.
* @author Bastian Baetz
* @ingroup data_pool
*/
class PoolVariableIF : public SerializeIF {
friend class PoolDataSetBase;
friend class GlobDataSet;
friend class LocalPoolDataSetBase;
public:
static constexpr uint8_t INTERFACE_ID = CLASS_ID::POOL_VARIABLE_IF;
static constexpr ReturnValue_t INVALID_READ_WRITE_MODE = MAKE_RETURN_CODE(0xA0);
static constexpr bool VALID = 1;
static constexpr bool INVALID = 0;
static constexpr uint32_t NO_PARAMETER = 0xffffffff;
enum ReadWriteMode_t {
VAR_READ, VAR_WRITE, VAR_READ_WRITE
};
/**
* @brief This is an empty virtual destructor,
* as it is proposed for C++ interfaces.
*/
virtual ~PoolVariableIF() {}
/**
* @brief This method returns if the variable is write-only,
* read-write or read-only.
*/
virtual ReadWriteMode_t getReadWriteMode() const = 0;
/**
* @brief This operation shall return the data pool id of the variable.
*/
virtual uint32_t getDataPoolId() const = 0;
/**
* @brief With this call, the valid information of the
* variable is returned.
*/
virtual bool isValid() const = 0;
/**
* @brief With this call, the valid information of the variable is set.
*/
virtual void setValid(bool validity) = 0;
/**
* @brief The commit call shall write back a newly calculated local
* value to the data pool.
* @details
* It is assumed that these calls are implemented in a thread-safe manner!
*/
virtual ReturnValue_t commit(uint32_t lockTimeout) = 0;
/**
* @brief The read call shall read the value of this parameter from
* the data pool and store the content locally.
* @details
* It is assumbed that these calls are implemented in a thread-safe manner!
*/
virtual ReturnValue_t read(uint32_t lockTimeout) = 0;
protected:
/**
* @brief Same as commit with the difference that comitting will be
* performed without a lock
* @return
* This can be used if the lock protection is handled externally
* to avoid the overhead of locking and unlocking consecutively.
* Declared protected to avoid free public usage.
*/
virtual ReturnValue_t readWithoutLock() = 0;
/**
* @brief Same as commit with the difference that comitting will be
* performed without a lock
* @return
* This can be used if the lock protection is handled externally
* to avoid the overhead of locking and unlocking consecutively.
* Declared protected to avoid free public usage.
*/
virtual ReturnValue_t commitWithoutLock() = 0;
};
using pool_rwm_t = PoolVariableIF::ReadWriteMode_t;
#endif /* POOLVARIABLEIF_H_ */