bevy/crates/bevy_ecs/src/system.rs

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use crate::{Resources, World};
use std::borrow::Cow;
#[derive(Copy, Clone)]
pub enum ThreadLocalExecution {
Immediate,
NextFlush,
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}
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#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub struct SystemId(pub u32);
impl SystemId {
pub fn new() -> Self {
SystemId(rand::random::<u32>())
}
}
pub trait System: Send + Sync {
fn name(&self) -> Cow<'static, str>;
fn id(&self) -> SystemId;
fn thread_local_execution(&self) -> ThreadLocalExecution;
fn run(&mut self, world: &World, resources: &Resources);
fn run_thread_local(&mut self, world: &mut World, resources: &mut Resources);
fn initialize(&mut self, _resources: &mut Resources) {}
}