#![cfg_attr(
any(not(all(tokio_unstable, feature = "full")), target_family = "wasm"),
allow(dead_code)
)]
use crate::runtime::Callback;
use crate::util::RngSeedGenerator;
pub(crate) struct Config {
/// How many ticks before pulling a task from the global/remote queue?
pub(crate) global_queue_interval: Option<u32>,
/// How many ticks before yielding to the driver for timer and I/O events?
pub(crate) event_interval: u32,
/// How big to make each worker's local queue
pub(crate) local_queue_capacity: usize,
/// Callback for a worker parking itself
pub(crate) before_park: Option<Callback>,
/// Callback for a worker unparking itself
pub(crate) after_unpark: Option<Callback>,
/// The multi-threaded scheduler includes a per-worker LIFO slot used to
/// store the last scheduled task. This can improve certain usage patterns,
/// especially message passing between tasks. However, this LIFO slot is not
/// currently stealable.
///
/// Eventually, the LIFO slot **will** become stealable, however as a
/// stop-gap, this unstable option lets users disable the LIFO task.
pub(crate) disable_lifo_slot: bool,
/// Random number generator seed to configure runtimes to act in a
/// deterministic way.
pub(crate) seed_generator: RngSeedGenerator,
/// How to build poll time histograms
pub(crate) metrics_poll_count_histogram: Option<crate::runtime::HistogramBuilder>,
#[cfg(tokio_unstable)]
/// How to respond to unhandled task panics.
pub(crate) unhandled_panic: crate::runtime::UnhandledPanic,
}