96 lines
3.0 KiB
C++
96 lines
3.0 KiB
C++
#ifndef FSFW_CONTAINER_SHAREDRINGBUFFER_H_
|
|
#define FSFW_CONTAINER_SHAREDRINGBUFFER_H_
|
|
|
|
#include "SimpleRingBuffer.h"
|
|
#include "DynamicFIFO.h"
|
|
#include "../ipc/MutexIF.h"
|
|
#include "../objectmanager/SystemObject.h"
|
|
#include "../timemanager/Clock.h"
|
|
|
|
/**
|
|
* @brief Ring buffer which can be shared among multiple objects
|
|
* @details
|
|
* This class offers a mutex to perform thread-safe operation on the ring
|
|
* buffer. It is still up to the developer to actually perform the lock
|
|
* and unlock operations.
|
|
*/
|
|
class SharedRingBuffer: public SystemObject,
|
|
public SimpleRingBuffer {
|
|
public:
|
|
/**
|
|
* This constructor allocates a new internal buffer with the supplied size.
|
|
* @param size
|
|
* @param overwriteOld
|
|
* If the ring buffer is overflowing at a write operartion, the oldest data
|
|
* will be overwritten.
|
|
*/
|
|
SharedRingBuffer(object_id_t objectId, const size_t size,
|
|
bool overwriteOld, size_t maxExcessBytes);
|
|
/**
|
|
* This constructor takes an external buffer with the specified size.
|
|
* @param buffer
|
|
* @param size
|
|
* @param overwriteOld
|
|
* If the ring buffer is overflowing at a write operartion, the oldest data
|
|
* will be overwritten.
|
|
*/
|
|
SharedRingBuffer(object_id_t objectId, uint8_t* buffer, const size_t size,
|
|
bool overwriteOld, size_t maxExcessBytes);
|
|
|
|
virtual~ SharedRingBuffer();
|
|
|
|
/**
|
|
* @brief This function can be used to add an optional FIFO to the class
|
|
* @details
|
|
* This FIFO will be allocated in the initialize function (and will
|
|
* have a fixed maximum size after that). It can be used to store
|
|
* values like packet sizes, for example for a shared ring buffer
|
|
* used by producer/consumer tasks.
|
|
*/
|
|
void setToUseReceiveSizeFIFO(size_t fifoDepth);
|
|
|
|
|
|
|
|
/**
|
|
* Unless a read-only constant value is read, all operations on the
|
|
* shared ring buffer should be protected by calling this function.
|
|
* @param timeoutType
|
|
* @param timeout
|
|
* @return
|
|
*/
|
|
virtual ReturnValue_t lockRingBufferMutex(MutexIF::TimeoutType timeoutType,
|
|
dur_millis_t timeout);
|
|
/**
|
|
* Any locked mutex also has to be unlocked, otherwise, access to the
|
|
* shared ring buffer will be blocked.
|
|
* @return
|
|
*/
|
|
virtual ReturnValue_t unlockRingBufferMutex();
|
|
|
|
/**
|
|
* The mutex handle can be accessed directly, for example to perform
|
|
* the lock with the #MutexGuard for a RAII compliant lock operation.
|
|
* @return
|
|
*/
|
|
MutexIF* getMutexHandle() const;
|
|
|
|
ReturnValue_t initialize() override;
|
|
|
|
/**
|
|
* If the shared ring buffer was configured to have a sizes FIFO, a handle
|
|
* to that FIFO can be retrieved with this function.
|
|
* Do not forget to protect access with a lock if required!
|
|
* @return
|
|
*/
|
|
DynamicFIFO<size_t>* getReceiveSizesFIFO();
|
|
private:
|
|
MutexIF* mutex = nullptr;
|
|
|
|
size_t fifoDepth = 0;
|
|
DynamicFIFO<size_t>* receiveSizesFIFO = nullptr;
|
|
};
|
|
|
|
|
|
|
|
#endif /* FSFW_CONTAINER_SHAREDRINGBUFFER_H_ */
|