# Ach
## Features
- `const`: static friendly
- `no_std`: Can run in embedded devices
- `no_alloc`: Needn't dynamic memory allocation
- Lock Free
- Wait Free: `try_send`/`try_recv` is Wait Free
- Spin: `send`/`recv` is only spin in critical section
## Usage
### AchOption
It can `set`/`take`/`replace`.
### Pool
It is an array of `AchOption`.
### Cell
It has allthe functions of `AchOption`, and it can be referenced.
It is similar to RwLock.
### Array
It is an array of `Cell`.
### Spsc
bounded SPSC queue.
### Ring
bounded ring buffer.
### Mpmc
bounded MPMC queue.
### Pubsub
broadcast channel.