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executor.rs
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executor.rs
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use crate::{schedule::SystemContainer, world::World};
use core::fmt::Debug;
use downcast_rs::{impl_downcast, Downcast};
pub trait ParallelSystemExecutor: Downcast + Send + Sync {
/// Called by `SystemStage` whenever `systems` have been changed.
fn rebuild_cached_data(&mut self, systems: &[SystemContainer]);
fn run_systems(&mut self, systems: &mut [SystemContainer], world: &mut World);
}
impl Debug for dyn ParallelSystemExecutor {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "dyn ParallelSystemExecutor")
}
}
impl_downcast!(ParallelSystemExecutor);
#[derive(Debug, Default)]
pub struct SingleThreadedExecutor;
impl ParallelSystemExecutor for SingleThreadedExecutor {
fn rebuild_cached_data(&mut self, _: &[SystemContainer]) {}
fn run_systems(&mut self, systems: &mut [SystemContainer], world: &mut World) {
for system in systems {
if system.should_run() {
#[cfg(feature = "trace")]
let _system_span =
bevy_utils::tracing::info_span!("system", name = &*system.name()).entered();
system.system_mut().run((), world);
}
}
}
}