This library features a simple header-only C++11 circular buffer implementation which I enjoyed using when developing hardware. As the Wikipedia entry for it suggests, circular buffers are useful when storing data streams with a constant amount of memory.
All you need to do to use this library is include the header file circularBuffer.h in the root directory and you're set!
DoxyGen documentation for this library is available here. You can also find an example here.
Importantly, it has two write modes. The CBUF_FILL write mode stops data storage when the buffer is full as is typical in hardware. However, I've implemented a second write mode CBUF_OVERWRITE which overwrites the most stale data in the buffer with the newest data point. This yeilds a sliding window effect on the data stream---this is useful in real-time streaming applications.
This was an interesting two hour-long exercise in converting a hardware/comoputer architecture concept to software. It also helped me refresh my memory of template classes which I use here.
This library is licensed under the GNU Lesser General Public License v3.