Circular Buffer Algorithm

The Circular Buffer Algorithm is a widely-used data structure that efficiently manages a fixed-size buffer by treating it as connected end-to-end, forming a circle. This algorithm is particularly useful in situations where data is continuously being produced and consumed, such as in communication systems or audio processing applications. The buffer is typically implemented as an array of fixed-size elements, and two pointers, called the head and the tail, are used to keep track of the start and end positions of the data within the buffer. When data is added to the buffer, it is written to the position pointed to by the head, and the head is then incremented. Conversely, when data is read from the buffer, it is read from the position pointed to by the tail, and the tail is then incremented. When either the head or tail pointer reaches the end of the array, it wraps around to the beginning, effectively creating the circular structure. One of the main advantages of the Circular Buffer Algorithm is its ability to efficiently handle the continuous flow of data by overwriting the oldest data when the buffer becomes full, without the need for any memory allocation or deallocation. This feature makes it both time and memory-efficient, as well as highly suitable for real-time applications and embedded systems with limited resources. Moreover, the algorithm is designed to be thread-safe, as the head and tail pointers can be updated independently by different threads, which reduces the chances of race conditions occurring. However, proper synchronization mechanisms must be employed to ensure that data is not overwritten before it has been read, and that the buffer does not become empty or overflow. Overall, the Circular Buffer Algorithm offers a simple, efficient, and robust method for managing data in a wide range of applications.
package CircularBuffer

const arraySize = 10

type CircularBuffer struct {
	data    [arraySize]int
	pointer int
}

func (b *CircularBuffer) InsertValue(i int) {
	if b.pointer == len(b.data) {
		b.pointer = 0
	}
	b.data[b.pointer] = i
	b.pointer += 1
}

func (b *CircularBuffer) GetValues() [arraySize]int {
	return b.data
}

func (b *CircularBuffer) GetValuesFromPosition(i int) ([arraySize]int, bool) {
	var out [arraySize]int

	if i >= len(out) {
		return out, false
	}

	for u := 0; u < len(out); u++ {
		if i >= len(b.data) {
			i = 0
		}
		out[u] = b.data[i]
		i += 1
	}
	return out, true
}

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