fsfw/ipc/MessageQueueIF.h
Ulrich Mohr 575f70ba03 updating code from Flying Laptop
This is the framework of Flying Laptop OBSW version A.13.0.
2018-07-12 16:29:32 +02:00

91 lines
4.1 KiB
C++

#ifndef FRAMEWORK_IPC_MESSAGEQUEUEIF_H_
#define FRAMEWORK_IPC_MESSAGEQUEUEIF_H_
#include <framework/ipc/MessageQueueMessage.h>
#include <framework/ipc/MessageQueueSenderIF.h>
class MessageQueueIF {
public:
static const MessageQueueId_t NO_QUEUE = MessageQueueSenderIF::NO_QUEUE; //!< Ugly hack.
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.
*/
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).
*/
virtual ReturnValue_t sendMessage( MessageQueueId_t sendTo, MessageQueueMessage* message, MessageQueueId_t sentFrom = NO_QUEUE, bool ignoreFault = false ) = 0;
/**
* \brief The sendToDefault 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.
*/
virtual ReturnValue_t sendToDefault( MessageQueueMessage* message, MessageQueueId_t sentFrom = NO_QUEUE, bool ignoreFault = false ) = 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_ */