Crate ringbuffer 

Ringbuffer

The ringbuffer crate provides safe fixed size circular buffers (ringbuffers) in rust.

Implementations for three kinds of ringbuffers, with a mostly similar API are provided:

type	description
AllocRingBuffer	Ringbuffer allocated on the heap at runtime. This ringbuffer is still fixed size. This requires the alloc feature.
GrowableAllocRingBuffer	Ringbuffer allocated on the heap at runtime. This ringbuffer can grow in size, and is implemented as an alloc::VecDeque internally. This requires the alloc feature.
ConstGenericRingBuffer	Ringbuffer which uses const generics to allocate on the stack.

All of these ringbuffers also implement the RingBuffer trait for their shared API surface.

MSRV: Rust 1.79

Usage

use ringbuffer::{AllocRingBuffer, RingBuffer};

let mut buffer = AllocRingBuffer::with_capacity(2);

// First entry of the buffer is now 5.
buffer.push(5);

// The last item we pushed is 5
assert_eq!(buffer.back(), Some(&5));

// Second entry is now 42.
buffer.push(42);
assert_eq!(buffer.peek(), Some(&5));
assert!(buffer.is_full());

// Because capacity is reached the next push will be the first item of the buffer.
buffer.push(1);
assert_eq!(buffer.to_vec(), vec![42, 1]);

Features

name	default	description
alloc	✓	Disable this feature to remove the dependency on alloc. Disabling this feature makes ringbuffer no_std.

License

Licensed under MIT License

Macros

impl_ring_buffer_set_len

Implement set_len given a readptr and a writeptr.

Structs

AllocRingBuffer

The AllocRingBuffer is a RingBuffer which is based on a Vec. This means it allocates at runtime on the heap, and therefore needs the alloc crate. This struct and therefore the dependency on alloc can be disabled by disabling the alloc (default) feature.

ConstGenericRingBuffer

The ConstGenericRingBuffer struct is a RingBuffer implementation which does not require alloc but uses const generics instead.

GrowableAllocRingBuffer

A growable ringbuffer. Once capacity is reached, the size is doubled. Wrapper of the built-in VecDeque struct.

Traits

RingBuffer

RingBuffer is a trait defining the standard interface for all RingBuffer implementations (AllocRingBuffer, ConstGenericRingBuffer)

SetLen

SetLen is a trait defining the unsafe set_len method on ringbuffers that support the operation.