fsfw/ipc/MessageQueueIF.h
2020-09-29 15:21:33 +02:00

174 lines
6.4 KiB
C++

#ifndef FSFW_IPC_MESSAGEQUEUEIF_H_
#define FSFW_IPC_MESSAGEQUEUEIF_H_
#include "messageQueueDefinitions.h"
#include "MessageQueueMessageIF.h"
#include "../returnvalues/HasReturnvaluesIF.h"
#include <cstdint>
// COULDDO: We could support blocking calls
// semaphores are being implemented, which makes this idea even more iteresting.
/**
* @defgroup message_queue Message Queue
* @brief Message Queue related software components
*/
class MessageQueueIF {
public:
static const MessageQueueId_t NO_QUEUE = 0;
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);
//! Returned if the target destination is invalid.
static constexpr ReturnValue_t DESTINVATION_INVALID = MAKE_RETURN_CODE(4);
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
* -@c RETURN_OK if ok
* -@c NO_REPLY_PARTNER Should return NO_REPLY_PARTNER if partner was found.
*/
virtual ReturnValue_t reply(MessageQueueMessageIF* 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(MessageQueueMessageIF* 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 theblastPartner 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.
* @return -@c RETURN_OK on success
* -@c MessageQueueIF::EMPTY if queue is empty
*/
virtual ReturnValue_t receiveMessage(MessageQueueMessageIF* 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 returnvalue 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).
* @return -@c RETURN_OK on success
* -@c MessageQueueIF::FULL if queue is full
*/
virtual ReturnValue_t sendMessageFrom( MessageQueueId_t sendTo,
MessageQueueMessageIF* 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,
MessageQueueMessageIF* message, bool ignoreFault = false ) = 0;
/**
* @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.
* @return -@c RETURN_OK on success
* -@c MessageQueueIF::FULL if queue is full
*/
virtual ReturnValue_t sendToDefaultFrom( MessageQueueMessageIF* 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.
* @return -@c RETURN_OK on success
* -@c MessageQueueIF::FULL if queue is full
*/
virtual ReturnValue_t sendToDefault( MessageQueueMessageIF* 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 /* FSFW_IPC_MESSAGEQUEUEIF_H_ */