fsfw/container/SimpleRingBuffer.h

89 lines
2.8 KiB
C++

#ifndef FRAMEWORK_CONTAINER_SIMPLERINGBUFFER_H_
#define FRAMEWORK_CONTAINER_SIMPLERINGBUFFER_H_
#include <framework/container/RingBufferBase.h>
#include <cstddef>
/**
* @brief Circular buffer implementation, useful for buffering
* into data streams.
* @details
* Note that the deleteData() has to be called to increment the read pointer.
* This class allocated dynamically, so
* @ingroup containers
*/
class SimpleRingBuffer: public RingBufferBase<> {
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.
*/
SimpleRingBuffer(const size_t size, bool overwriteOld);
/**
* 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.
*/
SimpleRingBuffer(uint8_t* buffer, const size_t size, bool overwriteOld);
virtual ~SimpleRingBuffer();
/**
* Write to circular buffer and increment write pointer by amount.
* @param data
* @param amount
* @return -@c RETURN_OK if write operation was successfull
* -@c RETURN_FAILED if
*/
ReturnValue_t writeData(const uint8_t* data, size_t amount);
/**
* Read from circular buffer at read pointer.
* @param data
* @param amount
* @param incrementReadPtr
* If this is set to true, the read pointer will be incremented.
* If readRemaining is set to true, the read pointer will be incremented
* accordingly.
* @param readRemaining
* If this is set to true, the data will be read even if the amount
* specified exceeds the read data available.
* @param trueAmount [out]
* If readRemaining was set to true, the true amount read will be assigned
* to the passed value.
* @return
* - @c RETURN_OK if data was read successfully
* - @c RETURN_FAILED if not enough data was available and readRemaining
* was set to false.
*/
ReturnValue_t readData(uint8_t* data, size_t amount,
bool incrementReadPtr = false, bool readRemaining = false,
size_t* trueAmount = nullptr);
/**
* Delete data by incrementing read pointer.
* @param amount
* @param deleteRemaining
* If the amount specified is larger than the remaing size to read and this
* is set to true, the remaining amount will be deleted as well
* @param trueAmount [out]
* If deleteRemaining was set to true, the amount deleted will be assigned
* to the passed value.
* @return
*/
ReturnValue_t deleteData(size_t amount, bool deleteRemaining = false,
size_t* trueAmount = nullptr);
private:
static const uint8_t READ_PTR = 0;
uint8_t* buffer = nullptr;
};
#endif /* FRAMEWORK_CONTAINER_SIMPLERINGBUFFER_H_ */