Trait async_local::AsyncLocal

pub trait AsyncLocal<T>
where
    T: AsContext,
{
    // Required methods
    fn with_blocking<F, R>(&'static self, f: F) -> JoinHandle<R>
       where F: for<'id> FnOnce(LocalRef<'id, T::Target>) -> R + Send + 'static,
             R: Send + 'static;
    fn local_ref<'id>(
        &'static self,
        guard: Guard<'id>
    ) -> LocalRef<'id, T::Target>;
}

LocalKey extension for creating thread-safe pointers to thread-local Context

Required Methods

fn with_blocking<F, R>(&'static self, f: F) -> JoinHandle<R>

where F: for<'id> FnOnce(LocalRef<'id, T::Target>) -> R + Send + 'static, R: Send + 'static,

Available on crate features tokio-runtime or barrier-protected-runtime only.

A wrapper around tokio::task::spawn_blocking that safely constrains the lifetime of LocalRef

fn local_ref<'id>(&'static self, guard: Guard<'id>) -> LocalRef<'id, T::Target>

Create a pointer to a thread local Context using a trusted lifetime carrier.

Usage

Use generativity::make_guard to generate a unique invariant lifetime brand

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl<T> AsyncLocal<T> for LocalKey<T>

where T: AsContext,

fn with_blocking<F, R>(&'static self, f: F) -> JoinHandle<R>

where F: for<'id> FnOnce(LocalRef<'id, T::Target>) -> R + Send + 'static, R: Send + 'static,

Available on crate features tokio-runtime or barrier-protected-runtime only.

fn local_ref<'id>(&'static self, guard: Guard<'id>) -> LocalRef<'id, T::Target>

Implementors