RwLock HashMap Arc Mutex File

Source: Dev.to

Code Example

pub struct Context {
    pub(crate) tools: HashMap>,
    pub(crate) fifos: tokio::sync::RwLock>>>,
 //                                ^                      ^   ^
}//          many fifos, but only  |    async ref counter |   | but only one will
 //           one active at a time |    because many file |   | be active at a time
 //                                |    refs could exist