Circular buffer
![A ring showing, conceptually, a circular buffer. This visually shows that the buffer has no real end and it can loop around the buffer. However, since memory is never physically created as a ring, a linear representation is generally used as is done below.](/Images/godic/202501/07/Circular_buffer.svg5920.png")
![A 24-byte keyboard circular buffer. When the write pointer is about to reach the read pointer - because the microprocessor is not responding, the buffer will stop recording keystrokes and - in some computers - a beep will be played.](/Images/godic/202501/07/Circular_Buffer_Animation5920.gif")
A circular buffer, circular queue, cyclic buffer or ring buffer is a data structure that uses a single, fixed-size buffer as if it were connected end-to-end. This structure lends itself easily to buffering data streams.
Cyclic buffer
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