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use tracing_core::span::Id;
pub mod layer;
pub mod prelude;
pub use layer::Layer;
use std::{cell::RefCell, default::Default, thread};
#[derive(Clone)]
pub struct CurrentSpanPerThread {
current: &'static thread::LocalKey<RefCell<Vec<Id>>>,
}
impl CurrentSpanPerThread {
pub fn new() -> Self {
thread_local! {
static CURRENT: RefCell<Vec<Id>> = RefCell::new(vec![]);
};
Self { current: &CURRENT }
}
pub fn id(&self) -> Option<Id> {
self.current
.with(|current| current.borrow().last().cloned())
}
pub fn enter(&self, span: Id) {
self.current.with(|current| {
current.borrow_mut().push(span);
})
}
pub fn exit(&self) {
self.current.with(|current| {
let _ = current.borrow_mut().pop();
})
}
}
impl Default for CurrentSpanPerThread {
fn default() -> Self {
Self::new()
}
}
mod sealed {
pub struct SealedTy {
_p: (),
}
pub trait Sealed<A = SealedTy> {}
}