Merge branch 'mueller/ipc-updates' into mueller/MQMQ_IF_UpdateFreeRTOS

devicehandlers/HealthDevice.cpp

@@ -5,7 +5,7 @@ HealthDevice::HealthDevice(object_id_t setObjectId,
 		MessageQueueId_t parentQueue) :
 		SystemObject(setObjectId), lastHealth(HEALTHY), parentQueue(
 				parentQueue), commandQueue(), healthHelper(this, setObjectId) {
-	commandQueue = QueueFactory::instance()->createMessageQueue(3, CommandMessage::COMMAND_MESSAGE_SIZE);
+	commandQueue = QueueFactory::instance()->createMessageQueue(3);
 }
 
 HealthDevice::~HealthDevice() {

ipc/CommandMessage.cpp

@@ -1,33 +1,15 @@
-/**
- * @file	CommandMessage.cpp
- * @brief	This file defines the CommandMessage class.
- * @date	20.06.2013
- * @author	baetz
- */
-
-#include "../devicehandlers/DeviceHandlerMessage.h"
-#include "../health/HealthMessage.h"
 #include "CommandMessage.h"
-#include "../memory/MemoryMessage.h"
+#include "CommandMessageCleaner.h"
-#include "../modes/ModeMessage.h"
+#include <cstring>
-#include "../monitoring/MonitoringMessage.h"
-#include "../subsystem/modes/ModeSequenceMessage.h"
-#include "../tmstorage/TmStoreMessage.h"
-#include "../parameters/ParameterMessage.h"
-
-namespace messagetypes {
-void clearMissionMessage(CommandMessage* message);
-}
-
 
 CommandMessage::CommandMessage() {
-	this->messageSize = COMMAND_MESSAGE_SIZE;
+    MessageQueueMessage::setMessageSize(DEFAULT_COMMAND_MESSAGE_SIZE);
     setCommand(CMD_NONE);
 }
 
 CommandMessage::CommandMessage(Command_t command, uint32_t parameter1,
         uint32_t parameter2) {
-	this->messageSize = COMMAND_MESSAGE_SIZE;
+    MessageQueueMessage::setMessageSize(DEFAULT_COMMAND_MESSAGE_SIZE);
     setCommand(command);
     setParameter(parameter1);
     setParameter2(parameter2);
@@ -35,82 +17,72 @@ CommandMessage::CommandMessage(Command_t command, uint32_t parameter1,
 
 Command_t CommandMessage::getCommand() const {
     Command_t command;
-	memcpy(&command, getData(), sizeof(Command_t));
+    std::memcpy(&command, MessageQueueMessage::getData(), sizeof(Command_t));
     return command;
 }
 
 void CommandMessage::setCommand(Command_t command) {
-	memcpy(getData(), &command, sizeof(command));
+    std::memcpy(MessageQueueMessage::getData(), &command, sizeof(Command_t));
+}
+
+uint8_t CommandMessage::getMessageType() const {
+    // first byte of command ID.
+    return getCommand() >> 8 & 0xff;
 }
 
 uint32_t CommandMessage::getParameter() const {
     uint32_t parameter1;
-	memcpy(&parameter1, getData() + sizeof(Command_t), sizeof(parameter1));
+    std::memcpy(&parameter1, this->getData(), sizeof(parameter1));
     return parameter1;
 }
 
 void CommandMessage::setParameter(uint32_t parameter1) {
-	memcpy(getData() + sizeof(Command_t), &parameter1, sizeof(parameter1));
+    std::memcpy(this->getData(), &parameter1, sizeof(parameter1));
 }
 
 uint32_t CommandMessage::getParameter2() const {
     uint32_t parameter2;
-	memcpy(&parameter2, getData() + sizeof(Command_t) + sizeof(uint32_t),
+    std::memcpy(&parameter2, this->getData() + sizeof(uint32_t),
             sizeof(parameter2));
     return parameter2;
 }
 
 void CommandMessage::setParameter2(uint32_t parameter2) {
-	memcpy(getData() + sizeof(Command_t) + sizeof(uint32_t), &parameter2,
+    std::memcpy(this->getData()  + sizeof(uint32_t), &parameter2,
             sizeof(parameter2));
 }
 
+uint32_t CommandMessage::getParameter3() const {
+    uint32_t parameter3;
+    std::memcpy(&parameter3, this->getData() + 2 * sizeof(uint32_t),
+            sizeof(parameter3));
+    return parameter3;
+}
+
+void CommandMessage::setParameter3(uint32_t parameter3) {
+    std::memcpy(this->getData()  + 2 * sizeof(uint32_t), &parameter3,
+            sizeof(parameter3));
+}
+
+size_t CommandMessage::getMinimumMessageSize() const {
+    return MINIMUM_COMMAND_MESSAGE_SIZE;
+}
+
 void CommandMessage::clearCommandMessage() {
-	switch((getCommand()>>8) & 0xff){
+    clear();
-	case  messagetypes::MODE_COMMAND:
+}
-		ModeMessage::clear(this);
+
-		break;
+void CommandMessage::clear() {
-	case messagetypes::HEALTH_COMMAND:
+    CommandMessageCleaner::clearCommandMessage(this);
-		HealthMessage::clear(this);
-		break;
-	case messagetypes::MODE_SEQUENCE:
-		ModeSequenceMessage::clear(this);
-		break;
-	case messagetypes::ACTION:
-		ActionMessage::clear(this);
-		break;
-	case messagetypes::DEVICE_HANDLER_COMMAND:
-		DeviceHandlerMessage::clear(this);
-		break;
-	case messagetypes::MEMORY:
-		MemoryMessage::clear(this);
-		break;
-	case messagetypes::MONITORING:
-		MonitoringMessage::clear(this);
-		break;
-	case messagetypes::TM_STORE:
-		TmStoreMessage::clear(this);
-		break;
-	case messagetypes::PARAMETER:
-		ParameterMessage::clear(this);
-		break;
-	default:
-		messagetypes::clearMissionMessage(this);
-		break;
-	}
 }
 
 bool CommandMessage::isClearedCommandMessage() {
     return getCommand() == CMD_NONE;
 }
 
-size_t CommandMessage::getMinimumMessageSize() const {
-	return COMMAND_MESSAGE_SIZE;
-}
-
 void CommandMessage::setToUnknownCommand() {
     Command_t initialCommand = getCommand();
-	clearCommandMessage();
+    this->clear();
     setReplyRejected(UNKNOWN_COMMAND, initialCommand);
 }
 
@@ -129,3 +101,11 @@ ReturnValue_t CommandMessage::getReplyRejectedReason(
     }
     return reason;
 }
+
+uint8_t* CommandMessage::getData() {
+    return MessageQueueMessage::getData() + sizeof(Command_t);
+}
+
+const uint8_t* CommandMessage::getData() const {
+    return MessageQueueMessage::getData() + sizeof(Command_t);
+}

ipc/CommandMessage.h

@@ -1,114 +1,86 @@
-/**
+#ifndef FSFW_IPC_COMMANDMESSAGE_H_
- * @file	CommandMessage.h
+#define FSFW_IPC_COMMANDMESSAGE_H_
- * @brief	This file defines the CommandMessage class.
- * @date	20.06.2013
- * @author	baetz
- */
-
-#ifndef COMMANDMESSAGE_H_
-#define COMMANDMESSAGE_H_
-
-
-#include "FwMessageTypes.h"
-#include <config/ipc/MissionMessageTypes.h>
 
+#include "CommandMessageIF.h"
 #include "MessageQueueMessage.h"
+#include "FwMessageTypes.h"
 
-#define MAKE_COMMAND_ID( number )	((MESSAGE_ID << 8) + (number))
+/**
-typedef ReturnValue_t Command_t;
+ * @brief 	Default command message used to pass command messages between tasks.
-
+ * 			Primary message type for IPC. Contains sender, 2-byte command ID
-class CommandMessage : public MessageQueueMessage {
+ * 			field, and 2 4-byte parameters.
-public:
+ * @details
-	static const uint8_t INTERFACE_ID = CLASS_ID::COMMAND_MESSAGE;
+ * It operates on an external memory which is contained inside a
-	static const ReturnValue_t UNKNOWN_COMMAND = MAKE_RETURN_CODE(0x01);
+ * class implementing MessageQueueMessageIF by taking its address.
-
+ * This allows for a more flexible designs of message implementations.
-
+ * The pointer can be passed to different message implementations without
-	static const uint8_t MESSAGE_ID = messagetypes::COMMAND;
+ * the need of unnecessary copying.
-	static const Command_t CMD_NONE = MAKE_COMMAND_ID( 0 );//!< Used internally, will be ignored
-	static const Command_t REPLY_COMMAND_OK = MAKE_COMMAND_ID( 3 );
-	static const Command_t REPLY_REJECTED = MAKE_COMMAND_ID( 0xD1 );//!< Reply indicating that the current command was rejected, par1 should contain the error code
-
-	/**
-	 * This is the size of a message as it is seen by the MessageQueue
-	 */
-	static const size_t COMMAND_MESSAGE_SIZE = HEADER_SIZE
-			+ sizeof(Command_t) + 2 * sizeof(uint32_t);
-
-	/**
-	 * Default Constructor, does not initialize anything.
  *
-	 * This constructor should be used when receiving a Message, as the content is filled by the MessageQueue.
+ * The command message is based of the generic MessageQueueMessage which
+ * currently has an internal message size of 28 bytes.
+ * @author	Bastian Baetz
+ */
+class CommandMessage: public MessageQueueMessage, public CommandMessageIF {
+public:
+    /**
+     * Default size can accomodate 2 4-byte parameters.
+     */
+    static constexpr size_t DEFAULT_COMMAND_MESSAGE_SIZE =
+            CommandMessageIF::MINIMUM_COMMAND_MESSAGE_SIZE + sizeof(uint32_t);
+
+	/**
+	 * @brief   Default Constructor, does not initialize anything.
+	 * @details
+	 * This constructor should be used when receiving a Message, as the
+	 * content is filled by the MessageQueue.
 	 */
 	CommandMessage();
 	/**
-	 * This constructor creates a new message with all message content initialized
+	 * This constructor creates a new message with all message content
+	 * initialized
 	 *
 	 * @param command	The DeviceHandlerCommand_t that will be sent
 	 * @param parameter1	The first parameter
 	 * @param parameter2	The second parameter
 	 */
-	CommandMessage(Command_t command,
+	CommandMessage(Command_t command, uint32_t parameter1, uint32_t parameter2);
-			uint32_t parameter1, uint32_t parameter2);
 
 	/**
-	 * Default Destructor
+	 * @brief 	Default Destructor
 	 */
-	virtual ~CommandMessage() {
+	virtual ~CommandMessage() {}
-	}
 
     /**
-	 * Read the DeviceHandlerCommand_t that is stored in the message, usually used after receiving
+     * Read the DeviceHandlerCommand_t that is stored in the message,
+     * usually used after receiving.
      *
      * @return the Command stored in the Message
      */
-	Command_t getCommand() const;
+    virtual Command_t getCommand() const override;
-
     /**
-	 * Set the DeviceHandlerCOmmand_t of the message
+     * Set the command type of the message. Default implementation also
-	 *
+     * sets the message type, which will be the first byte of the command ID.
      * @param the Command to be sent
      */
-	void setCommand(Command_t command);
+    virtual void setCommand(Command_t command);
+
+    virtual uint8_t* getData() override;
+    virtual const uint8_t* getData() const override;
 
 	/**
 	 * Get the first parameter of the message
-	 *
 	 * @return the first Parameter of the message
 	 */
 	uint32_t getParameter() const;
-
 	/**
 	 * Set the first parameter of the message
-	 *
 	 * @param the first parameter of the message
 	 */
 	void setParameter(uint32_t parameter1);
-
-	/**
-	 * Get the second parameter of the message
-	 *
-	 * @return the second Parameter of the message
-	 */
 	uint32_t getParameter2() const;
-
-	/**
-	 * Set the second parameter of the message
-	 *
-	 * @param the second parameter of the message
-	 */
 	void setParameter2(uint32_t parameter2);
-
+	uint32_t getParameter3() const;
-	/**
+	void setParameter3(uint32_t parameter3);
-	 * Set the command to CMD_NONE and try to find
-	 * the correct class to handle a more detailed
-	 * clear.
-	 * Also, calls a mission-specific clearMissionMessage
-	 * function to separate between framework and mission
-	 * messages. Not optimal, may be replaced by totally
-	 * different auto-delete solution (e.g. smart pointers).
-	 *
-	 */
-	void clearCommandMessage();
 
 	/**
 	 * check if a message was cleared
@@ -117,18 +89,41 @@ public:
 	 */
 	bool isClearedCommandMessage();
 
-
 	/**
 	 * Sets the command to REPLY_REJECTED with parameter UNKNOWN_COMMAND.
 	 * Is needed quite often, so we better code it once only.
 	 */
-	void setToUnknownCommand();
+	void setToUnknownCommand() override;
-	void setReplyRejected(ReturnValue_t reason, Command_t initialCommand = CMD_NONE);
-	ReturnValue_t getReplyRejectedReason(
-	        Command_t *initialCommand = nullptr) const;
 
-	size_t getMinimumMessageSize() const;
+    /**
+     * A command message can be rejected and needs to offer a function
+     * to set a rejected reply
+     * @param reason
+     * @param initialCommand
+     */
+    void setReplyRejected(ReturnValue_t reason,
+            Command_t initialCommand) override;
+    /**
+     * Corrensonding getter function.
+     * @param initialCommand
+     * @return
+     */
+    ReturnValue_t getReplyRejectedReason(
+            Command_t* initialCommand = nullptr) const override;
+
+
+    virtual void clear() override;
+    void clearCommandMessage();
+
+    /**
+     * Extract message ID, which is the first byte of the command ID for the
+     * default implementation.
+     * @return
+     */
+    virtual uint8_t getMessageType() const override;
+
+    /** MessageQueueMessageIF functions used for minimum size check. */
+    size_t getMinimumMessageSize() const override;
 };
 
-
+#endif /* FSFW_IPC_COMMANDMESSAGE_H_ */
-#endif /* COMMANDMESSAGE_H_ */

ipc/CommandMessageCleaner.cpp

@@ -0,0 +1,45 @@
+#include "../ipc/CommandMessageCleaner.h"
+
+#include "../devicehandlers/DeviceHandlerMessage.h"
+#include "../health/HealthMessage.h"
+#include "../memory/MemoryMessage.h"
+#include "../modes/ModeMessage.h"
+#include "../monitoring/MonitoringMessage.h"
+#include "../subsystem/modes/ModeSequenceMessage.h"
+#include "../tmstorage/TmStoreMessage.h"
+#include "../parameters/ParameterMessage.h"
+
+void CommandMessageCleaner::clearCommandMessage(CommandMessage* message) {
+	switch(message->getMessageType()){
+	case  messagetypes::MODE_COMMAND:
+		ModeMessage::clear(message);
+		break;
+	case messagetypes::HEALTH_COMMAND:
+		HealthMessage::clear(message);
+		break;
+	case messagetypes::MODE_SEQUENCE:
+		ModeSequenceMessage::clear(message);
+		break;
+	case messagetypes::ACTION:
+		ActionMessage::clear(message);
+		break;
+	case messagetypes::DEVICE_HANDLER_COMMAND:
+		DeviceHandlerMessage::clear(message);
+		break;
+	case messagetypes::MEMORY:
+		MemoryMessage::clear(message);
+		break;
+	case messagetypes::MONITORING:
+		MonitoringMessage::clear(message);
+		break;
+	case messagetypes::TM_STORE:
+		TmStoreMessage::clear(message);
+		break;
+	case messagetypes::PARAMETER:
+		ParameterMessage::clear(message);
+		break;
+	default:
+		messagetypes::clearMissionMessage(message);
+		break;
+	}
+}

ipc/CommandMessageCleaner.h

@@ -0,0 +1,16 @@
+#ifndef FRAMEWORK_IPC_COMMANDMESSAGECLEANER_H_
+#define FRAMEWORK_IPC_COMMANDMESSAGECLEANER_H_
+#include "../ipc/CommandMessage.h"
+
+namespace messagetypes {
+// Implemented in config.
+void clearMissionMessage(CommandMessage* message);
+}
+
+class CommandMessageCleaner {
+public:
+	static void clearCommandMessage(CommandMessage* message);
+};
+
+
+#endif /* FRAMEWORK_IPC_COMMANDMESSAGECLEANER_H_ */

ipc/CommandMessageIF.h

@@ -0,0 +1,73 @@
+#ifndef FSFW_IPC_COMMANDMESSAGEIF_H_
+#define FSFW_IPC_COMMANDMESSAGEIF_H_
+
+#include "MessageQueueMessageIF.h"
+#include "FwMessageTypes.h"
+#include "../returnvalues/HasReturnvaluesIF.h"
+
+#define MAKE_COMMAND_ID( number )	((MESSAGE_ID << 8) + (number))
+typedef uint16_t Command_t;
+
+class CommandMessageIF {
+public:
+    /**
+     * Header consists of sender ID and command ID.
+     */
+	static constexpr size_t HEADER_SIZE = MessageQueueMessageIF::HEADER_SIZE +
+			sizeof(Command_t);
+	/**
+	 * This minimum size is derived from the interface requirement to be able
+     * to set a rejected reply, which contains a returnvalue and the initial
+     * command.
+	 */
+	static constexpr size_t MINIMUM_COMMAND_MESSAGE_SIZE =
+	        CommandMessageIF::HEADER_SIZE + sizeof(ReturnValue_t) +
+	        sizeof(Command_t);
+
+	static const uint8_t INTERFACE_ID = CLASS_ID::COMMAND_MESSAGE;
+	static const ReturnValue_t UNKNOWN_COMMAND = MAKE_RETURN_CODE(0x01);
+
+	static const uint8_t MESSAGE_ID = messagetypes::COMMAND;
+	//! Used internally, shall be ignored
+	static const Command_t CMD_NONE = MAKE_COMMAND_ID( 0 );
+	static const Command_t REPLY_COMMAND_OK = MAKE_COMMAND_ID( 1 );
+	//! Reply indicating that the current command was rejected,
+	//! par1 should contain the error code
+	static const Command_t REPLY_REJECTED = MAKE_COMMAND_ID( 2 );
+
+	virtual ~CommandMessageIF() {};
+
+	/**
+	 * A command message shall have a uint16_t command ID field.
+	 * @return
+	 */
+	virtual Command_t getCommand() const = 0;
+	/**
+	 * A command message shall have a uint8_t message type ID field.
+	 * @return
+	 */
+	virtual uint8_t getMessageType() const = 0;
+
+	/**
+	 * A command message can be rejected and needs to offer a function
+	 * to set a rejected reply
+	 * @param reason
+	 * @param initialCommand
+	 */
+	virtual void setReplyRejected(ReturnValue_t reason,
+			Command_t initialCommand) = 0;
+	/**
+	 * Corrensonding getter function.
+	 * @param initialCommand
+	 * @return
+	 */
+	virtual ReturnValue_t getReplyRejectedReason(
+			Command_t* initialCommand = nullptr) const  = 0;
+
+	virtual void setToUnknownCommand() = 0;
+
+	virtual void clear() = 0;
+
+};
+
+#endif /* FSFW_IPC_COMMANDMESSAGEIF_H_ */

ipc/MessageQueueMessage.cpp

@@ -1,13 +1,27 @@
 #include "MessageQueueMessage.h"
 #include "../serviceinterface/ServiceInterfaceStream.h"
-
+#include "../globalfunctions/arrayprinter.h"
-#include <string.h>
+#include <cstring>
 
 MessageQueueMessage::MessageQueueMessage() :
-		messageSize(this->HEADER_SIZE) {
+		messageSize(getMinimumMessageSize()) {
 	memset(this->internalBuffer, 0, sizeof(this->internalBuffer));
 }
 
+MessageQueueMessage::MessageQueueMessage(uint8_t* data, size_t size) :
+		messageSize(this->HEADER_SIZE + size) {
+	if (size <= this->MAX_DATA_SIZE) {
+		memcpy(this->getData(), data, size);
+		this->messageSize = this->HEADER_SIZE + size;
+	}
+	else {
+		sif::warning << "MessageQueueMessage: Passed size larger than maximum"
+				"allowed size! Setting content to 0" << std::endl;
+		memset(this->internalBuffer, 0, sizeof(this->internalBuffer));
+		this->messageSize = this->HEADER_SIZE;
+	}
+}
+
 MessageQueueMessage::~MessageQueueMessage() {
 }
 
@@ -37,29 +51,34 @@ void MessageQueueMessage::setSender(MessageQueueId_t setId) {
 	memcpy(this->internalBuffer, &setId, sizeof(MessageQueueId_t));
 }
 
-MessageQueueMessage::MessageQueueMessage(uint8_t* data, uint32_t size) :
+void MessageQueueMessage::print(bool printWholeMessage) {
-		messageSize(this->HEADER_SIZE + size) {
+	sif::debug << "MessageQueueMessage content: " << std::endl;
-	if (size <= this->MAX_DATA_SIZE) {
+	if(printWholeMessage) {
-		memcpy(this->getData(), data, size);
+	    arrayprinter::print(getData(), getMaximumMessageSize());
-	} else {
-		memset(this->internalBuffer, 0, sizeof(this->internalBuffer));
-		this->messageSize = this->HEADER_SIZE;
 	}
-}
+	else {
-
+	    arrayprinter::print(getData(), getMessageSize());
-size_t MessageQueueMessage::getMinimumMessageSize() {
-	return this->HEADER_SIZE;
-}
-
-void MessageQueueMessage::print() {
-	sif::debug << "MessageQueueMessage has size: " << this->messageSize << std::hex
-			<< std::endl;
-	for (uint8_t count = 0; count < this->messageSize; count++) {
-		sif::debug << (uint32_t) this->internalBuffer[count] << ":";
 	}
-	sif::debug << std::dec << std::endl;
+
 }
 
 void MessageQueueMessage::clear() {
 	memset(this->getBuffer(), 0, this->MAX_MESSAGE_SIZE);
 }
+
+size_t MessageQueueMessage::getMessageSize() const {
+	return this->messageSize;
+}
+
+void MessageQueueMessage::setMessageSize(size_t messageSize) {
+	this->messageSize = messageSize;
+}
+
+size_t MessageQueueMessage::getMinimumMessageSize() const {
+    return this->MIN_MESSAGE_SIZE;
+}
+
+size_t MessageQueueMessage::getMaximumMessageSize() const {
+    return this->MAX_MESSAGE_SIZE;
+}
+

ipc/MessageQueueMessage.h

@@ -1,118 +1,150 @@
-#ifndef MESSAGEQUEUEMESSAGE_H_
+#ifndef FSFW_IPC_MESSAGEQUEUEMESSAGE_H_
-#define MESSAGEQUEUEMESSAGE_H_
+#define FSFW_IPC_MESSAGEQUEUEMESSAGE_H_
 
-#include "MessageQueueSenderIF.h"
+#include "../ipc/MessageQueueMessageIF.h"
-#include <stddef.h>
+#include "../ipc/MessageQueueSenderIF.h"
+#include <cstddef>
 
 /**
- *	\brief		This class is the representation and data organizer for interprocess messages.
+ *	@brief		This class is the representation and data organizer
+ *				for interprocess messages.
+ *	@details
+ *	To facilitate and standardize interprocess communication, this class was
+ *	created to handle a lightweight "interprocess message protocol".
  *
- *	\details	To facilitate and standardize interprocess communication, this class was created
+ *	It adds a header with the sender's queue id to every sent message and
- *				to handle a lightweight "interprocess message protocol". It adds a header with the
+ *	defines the maximum total message size. Specialized messages, such as
- *				sender's queue id to every sent message and defines the maximum total message size.
+ *	device commanding messages, can be created by inheriting from this class
- *				Specialized messages, such as device commanding messages, can be created by inheriting
+ *	and filling the buffer provided by getData with additional content.
- *				from this class and filling the buffer provided by getData with additional content.
+ *
- *				If larger amounts of data must be sent between processes, the data shall be stored in
+ *	If larger amounts of data must be sent between processes, the data shall
- *				the IPC Store object and only the storage id is passed in a queue message.
+ *	be stored in the IPC Store object and only the storage id is passed in a
- *				The class is used both to generate and send messages and to receive messages from
+ *	queue message.The class is used both to generate and send messages and to
- *				other tasks.
+ *	receive messages from other tasks.
- *	\ingroup message_queue
+ *	@ingroup message_queue
  */
-class MessageQueueMessage {
+class MessageQueueMessage: public MessageQueueMessageIF {
 public:
 	/**
-	 * \brief	This constant defines the maximum size of the data content, excluding the header.
+	 * @brief	The class is initialized empty with this constructor.
-	 * \details	It may be changed if necessary, but in general should be kept as small as possible.
+	 * @details
+	 * The messageSize attribute is set to the header's size and the whole
+	 * content is set to zero.
+	 */
+	MessageQueueMessage();
+	/**
+	 * @brief	With this constructor the class is initialized with
+	 * 			the given content.
+	 * @details
+	 * If the passed message size fits into the buffer, the passed data is
+	 * copied to the internal buffer and the messageSize information is set.
+	 * Otherwise, messageSize is set to the header's size and the whole
+	 * content is set to zero.
+	 * @param data	The data to be put in the message.
+	 * @param size	Size of the data to be copied. Must be smaller than
+	 * 				MAX_MESSAGE_SIZE and larger than MIN_MESSAGE_SIZE.
+	 */
+	MessageQueueMessage(uint8_t* data, size_t size);
+
+	/**
+	 * @brief	As no memory is allocated in this class,
+	 * 		    the destructor is empty.
+	 */
+	virtual ~MessageQueueMessage();
+
+	/**
+	 * @brief	The size information of each message is stored in
+	 *  			this attribute.
+	 * @details
+	 * It is public to simplify usage and to allow for passing the size
+	 * address as a pointer. Care must be taken when inheriting from this class,
+	 * as every child class is responsible for managing the size information by
+	 * itself. When using the class to receive a message, the size information
+	 * is updated automatically.
+	 *
+	 * Please note that the minimum size is limited by the size of the header
+	 * while the maximum size is limited by the maximum allowed message size.
+	 */
+	size_t messageSize;
+	/**
+	 * @brief	This constant defines the maximum size of the data content,
+	 * 			excluding the header.
+	 * @details
+	 * It may be changed if necessary, but in general should be kept
+	 * as small as possible.
 	 */
 	static const size_t MAX_DATA_SIZE = 24;
+
 	/**
-	 * \brief	This constants defines the size of the header, which is added to every message.
+	 * @brief	This constant defines the maximum total size in bytes
+	 * 			of a sent message.
+	 * @details
+	 * It is the sum of the maximum data and the header size. Be aware that
+	 * this constant is used to define the buffer sizes for every message
+	 * queue in the system. So, a change here may have significant impact on
+	 * the required resources.
 	 */
-	static const size_t HEADER_SIZE = sizeof(MessageQueueId_t);
+	static constexpr size_t MAX_MESSAGE_SIZE = MAX_DATA_SIZE + HEADER_SIZE;
 	/**
-	 * \brief	This constant defines the maximum total size in bytes of a sent message.
+	 * @brief Defines the minimum size of a message where only the
-	 * \details	It is the sum of the maximum data and the header size. Be aware that this constant
+	 * 		  header is included
-	 * 			is used to define the buffer sizes for every message queue in the system. So, a change
-	 * 			here may have significant impact on the required resources.
 	 */
-	static const size_t MAX_MESSAGE_SIZE = MAX_DATA_SIZE + HEADER_SIZE;
+	static constexpr size_t MIN_MESSAGE_SIZE = HEADER_SIZE;
 private:
 	/**
-	 * \brief	This is the internal buffer that contains the actual message data.
+	 * @brief	This is the internal buffer that contains the
+	 * 			actual message data.
 	 */
 	uint8_t internalBuffer[MAX_MESSAGE_SIZE];
 public:
 	/**
-	 * \brief	The size information of each message is stored in this attribute.
+	 * @brief	This method is used to get the complete data of the message.
-	 * \details	It is public to simplify usage and to allow for passing the variable's address as a
-	 * 			pointer. Care must be taken when inheriting from this class, as every child class is
-	 * 			responsible for managing the size information by itself. When using the class to
-	 * 			receive a message, the size information is updated automatically.
 	 */
-	size_t messageSize;
+	const uint8_t* getBuffer() const override;
 	/**
-	 * \brief	The class is initialized empty with this constructor.
+	 * @brief	This method is used to get the complete data of the message.
-	 * \details	The messageSize attribute is set to the header's size and the whole content is set to
-	 * 			zero.
 	 */
-	MessageQueueMessage();
+	uint8_t* getBuffer() override;
 	/**
-	 * \brief	With this constructor the class is initialized with the given content.
+	 * @brief	This method is used to fetch the data content of the message.
-	 * \details	If the passed message size fits into the buffer, the passed data is copied to the
+	 * @details
-	 * 			internal buffer and the messageSize information is set. Otherwise, messageSize
+	 * It shall be used by child classes to add data at the right position.
-	 * 			is set to the header's size and the whole content is set to zero.
-	 * \param data	The data to be put in the message.
-	 * \param size	Size of the data to be copied. Must be smaller than MAX_MESSAGE_SIZE.
 	 */
-	MessageQueueMessage(uint8_t* data, uint32_t size);
+	const uint8_t* getData() const override;
 	/**
-	 * \brief	As no memory is allocated in this class, the destructor is empty.
+	 * @brief	This method is used to fetch the data content of the message.
+	 * @details
+	 * It shall be used by child classes to add data at the right position.
 	 */
-	virtual ~MessageQueueMessage();
+	uint8_t* getData() override;
 	/**
-	 * \brief	This method is used to get the complete data of the message.
+	 * @brief	This method is used to extract the sender's message
+	 * 			queue id information from a received message.
 	 */
-	const uint8_t* getBuffer() const;
+	MessageQueueId_t getSender() const override;
 	/**
-	 * \brief	This method is used to get the complete data of the message.
+	 * @brief	With this method, the whole content
+	 * 			and the message size is set to zero.
 	 */
-	uint8_t* getBuffer();
+	void clear() override;
+
 	/**
-	 * \brief	This method is used to fetch the data content of the message.
+	 * @brief	This method is used to set the sender's message queue id
-	 * \details It shall be used by child classes to add data at the right position.
+	 * 			information prior to ing the message.
+	 * @param setId
+	 * The message queue id that identifies the sending message queue.
 	 */
-	const uint8_t* getData() const;
+	void setSender(MessageQueueId_t setId) override;
+
+	virtual size_t getMessageSize() const override;
+	virtual void setMessageSize(size_t messageSize) override;
+	virtual size_t getMinimumMessageSize() const override;
+	virtual size_t getMaximumMessageSize() const override;
+
 	/**
-	 * \brief	This method is used to fetch the data content of the message.
+	 * @brief	This is a debug method that prints the content.
-	 * \details It shall be used by child classes to add data at the right position.
 	 */
-	uint8_t* getData();
+	void print(bool printWholeMessage);
-	/**
-	 * \brief	This method is used to extract the sender's message queue id information from a
-	 * 			received message.
-	 */
-	MessageQueueId_t getSender() const;
-	/**
-	 * \brief	With this method, the whole content and the message size is set to zero.
-	 */
-	void clear();
-	/**
-	 * \brief	This is a debug method that prints the content (till messageSize) to the debug output.
-	 */
-	void print();
-	/**
-	 * \brief	This method is used to set the sender's message queue id information prior to
-	 * 			sending the message.
-	 * \param setId	The message queue id that identifies the sending message queue.
-	 */
-	void setSender(MessageQueueId_t setId);
-	/**
-	 * \brief	This helper function is used by the MessageQueue class to check the size of an
-	 * 			incoming message.
-	 * \details	The method must be overwritten by child classes if size checks shall be more strict.
-	 * @return	The default implementation returns HEADER_SIZE.
-	 */
-	virtual size_t getMinimumMessageSize();
 };
 
-#endif /* MESSAGEQUEUEMESSAGE_H_ */
+#endif /* FSFW_IPC_MESSAGEQUEUEMESSAGE_H_ */

ipc/MessageQueueMessageIF.h

@@ -0,0 +1,91 @@
+#ifndef FRAMEWORK_IPC_MESSAGEQUEUEMESSAGEIF_H_
+#define FRAMEWORK_IPC_MESSAGEQUEUEMESSAGEIF_H_
+#include <cstddef>
+#include <cstdint>
+
+/*
+ * TODO: Actually, the definition of this ID to be a uint32_t is not  ideal and
+ * breaks layering. However, it is difficult to keep layering, as the ID is
+ * stored in many places and sent around in MessageQueueMessage.
+ * Ideally, one would use the (current) object_id_t only, however, doing a
+ * lookup of queueIDs for every call does not sound ideal.
+ * In a first step, I'll circumvent the issue by not touching it,
+ * maybe in a second step. This also influences Interface design
+ * (getCommandQueue) and some other issues..
+ */
+
+typedef uint32_t MessageQueueId_t;
+
+class MessageQueueMessageIF {
+public:
+	static const MessageQueueId_t NO_QUEUE = -1;
+    /**
+     * @brief   This constants defines the size of the header,
+     *          which is added to every message.
+     */
+    static const size_t HEADER_SIZE = sizeof(MessageQueueId_t);
+
+	virtual ~MessageQueueMessageIF() {};
+
+	/**
+	 * @brief	With this method, the whole content and the message
+	 * 			size is set to zero.
+	 * @details
+	 * Implementations should also take care to clear data which is stored
+	 * indirectly (e.g. storage data).
+	 */
+	virtual void clear() = 0;
+
+	/**
+	 * @brief	Get read-only pointer to the complete data of the message.
+	 * @return
+	 */
+	virtual const uint8_t* getBuffer() const = 0;
+
+	/**
+	 * @brief	This method is used to get the complete data of the message.
+	 */
+	virtual uint8_t* getBuffer() = 0;
+
+	/**
+	 * @brief	This method is used to set the sender's message queue id
+	 * 			information prior to sending the message.
+	 * @param setId
+	 * The message queue id that identifies the sending message queue.
+	 */
+	virtual void setSender(MessageQueueId_t setId) = 0;
+
+	/**
+	 * @brief	This method is used to extract the sender's message queue id
+	 * 			information from a received message.
+	 */
+	virtual MessageQueueId_t getSender() const = 0;
+
+	/**
+	 * @brief	This method is used to fetch the data content of the message.
+	 * @details
+	 * It shall be used by child classes to add data at the right position.
+	 */
+	virtual const uint8_t* getData() const = 0;
+	/**
+	 * @brief	This method is used to fetch the data content of the message.
+	 * @details
+	 * It shall be used by child classes to add data at the right position.
+	 */
+	virtual uint8_t* getData() = 0;
+
+	/**
+	 * Get constant message size of current message implementation.
+	 * @return
+	 */
+	virtual size_t getMessageSize() const = 0;
+
+    virtual void setMessageSize(size_t messageSize) = 0;
+    virtual size_t getMinimumMessageSize() const = 0;
+    virtual size_t getMaximumMessageSize() const = 0;
+
+};
+
+
+
+#endif /* FRAMEWORK_IPC_MESSAGEQUEUEMESSAGEIF_H_ */