fsfw/ipc/MessageQueueIF.h

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#ifndef FSFW_IPC_MESSAGEQUEUEIF_H_
#define FSFW_IPC_MESSAGEQUEUEIF_H_
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// COULDDO: We could support blocking calls
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#include "messageQueueDefinitions.h"
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#include "MessageQueueMessage.h"
#include "../returnvalues/HasReturnvaluesIF.h"
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class MessageQueueIF {
public:
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static const MessageQueueId_t NO_QUEUE = 0;
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static const uint8_t INTERFACE_ID = CLASS_ID::MESSAGE_QUEUE_IF;
/**
* No new messages on the queue
*/
static const ReturnValue_t EMPTY = MAKE_RETURN_CODE(1);
/**
* No space left for more messages
*/
static const ReturnValue_t FULL = MAKE_RETURN_CODE(2);
/**
* Returned if a reply method was called without partner
*/
static const ReturnValue_t NO_REPLY_PARTNER = MAKE_RETURN_CODE(3);
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virtual ~MessageQueueIF() {}
/**
* @brief This operation sends a message to the last communication partner.
* @details This operation simplifies answering an incoming message by using the stored
* lastParnter information as destination. If there was no message received yet
* (i.e. lastPartner is zero), an error code is returned.
* @param message A pointer to a previously created message, which is sent.
* \return RETURN_OK if ok
* \return NO_REPLY_PARTNER Should return NO_REPLY_PARTNER if partner was found
*/
virtual ReturnValue_t reply( MessageQueueMessage* message ) = 0;
/**
* @brief This function reads available messages from the message queue and returns the sender.
* @details It works identically to the other receiveMessage call, but in addition returns the
* sender's queue id.
* @param message A pointer to a message in which the received data is stored.
* @param receivedFrom A pointer to a queue id in which the sender's id is stored.
*/
virtual ReturnValue_t receiveMessage(MessageQueueMessage* message,
MessageQueueId_t *receivedFrom) = 0;
/**
* @brief This function reads available messages from the message queue.
* @details If data is available it is stored in the passed message pointer. The message's
* original content is overwritten and the sendFrom information is stored in the
* lastPartner attribute. Else, the lastPartner information remains untouched, the
* message's content is cleared and the function returns immediately.
* @param message A pointer to a message in which the received data is stored.
*/
virtual ReturnValue_t receiveMessage(MessageQueueMessage* message) = 0;
/**
* Deletes all pending messages in the queue.
* @param count The number of flushed messages.
* @return RETURN_OK on success.
*/
virtual ReturnValue_t flush(uint32_t* count) = 0;
/**
* @brief This method returns the message queue id of the last communication partner.
*/
virtual MessageQueueId_t getLastPartner() const = 0;
/**
* @brief This method returns the message queue id of this class's message queue.
*/
virtual MessageQueueId_t getId() const = 0;
/**
* \brief With the sendMessage call, a queue message is sent to a receiving queue.
* \details This method takes the message provided, adds the sentFrom information and passes
* it on to the destination provided with an operating system call. The OS's return
* value is returned.
* \param sendTo This parameter specifies the message queue id to send the message to.
* \param message This is a pointer to a previously created message, which is sent.
* \param sentFrom The sentFrom information can be set to inject the sender's queue id into the message.
* This variable is set to zero by default.
* \param ignoreFault If set to true, the internal software fault counter is not incremented if queue is full (if implemented).
*/
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virtual ReturnValue_t sendMessageFrom( MessageQueueId_t sendTo, MessageQueueMessage* message, MessageQueueId_t sentFrom, bool ignoreFault = false ) = 0;
/**
* @brief This operation sends a message to the given destination.
* @details It directly uses the sendMessage call of the MessageQueueSender parent, but passes its
* queue id as "sentFrom" parameter.
* @param sendTo This parameter specifies the message queue id of the destination message queue.
* @param message A pointer to a previously created message, which is sent.
* @param ignoreFault If set to true, the internal software fault counter is not incremented if queue is full.
*/
virtual ReturnValue_t sendMessage( MessageQueueId_t sendTo, MessageQueueMessage* message, bool ignoreFault = false ) = 0;
/**
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* \brief The sendToDefaultFrom method sends a queue message to the default destination.
* \details In all other aspects, it works identical to the sendMessage method.
* \param message This is a pointer to a previously created message, which is sent.
* \param sentFrom The sentFrom information can be set to inject the sender's queue id into the message.
* This variable is set to zero by default.
*/
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virtual ReturnValue_t sendToDefaultFrom( MessageQueueMessage* message, MessageQueueId_t sentFrom, bool ignoreFault = false ) = 0;
/**
* @brief This operation sends a message to the default destination.
* @details As in the sendMessage method, this function uses the sendToDefault call of the
* Implementation class and adds its queue id as "sentFrom" information.
* @param message A pointer to a previously created message, which is sent.
*/
virtual ReturnValue_t sendToDefault( MessageQueueMessage* message ) = 0;
/**
* \brief This method is a simple setter for the default destination.
*/
virtual void setDefaultDestination(MessageQueueId_t defaultDestination) = 0;
/**
* \brief This method is a simple getter for the default destination.
*/
virtual MessageQueueId_t getDefaultDestination() const = 0;
virtual bool isDefaultDestinationSet() const = 0;
};
#endif /* FRAMEWORK_IPC_MESSAGEQUEUEIF_H_ */