47 lines
1.2 KiB
Rust
47 lines
1.2 KiB
Rust
use std::cell::RefCell;
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use std::num::NonZeroU16;
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use std::rc::Rc;
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use std::{fmt, ops};
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use async_std::sync::RwLock;
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use futures::task::LocalSpawn;
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use hashbrown::HashMap;
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use orchid_api::SysId;
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use orchid_base::interner::Interner;
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use crate::api;
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use crate::atom::WeakAtomHand;
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use crate::system::{System, WeakSystem};
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pub struct CtxData {
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pub i: Rc<Interner>,
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pub spawn: Rc<dyn LocalSpawn>,
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pub systems: RwLock<HashMap<api::SysId, WeakSystem>>,
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pub system_id: RefCell<NonZeroU16>,
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pub owned_atoms: RwLock<HashMap<api::AtomId, WeakAtomHand>>,
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}
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#[derive(Clone)]
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pub struct Ctx(Rc<CtxData>);
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impl ops::Deref for Ctx {
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type Target = CtxData;
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fn deref(&self) -> &Self::Target { &*self.0 }
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}
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impl Ctx {
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pub(crate) async fn system_inst(&self, id: api::SysId) -> Option<System> {
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self.systems.read().await.get(&id).and_then(WeakSystem::upgrade)
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}
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pub(crate) fn next_sys_id(&self) -> api::SysId {
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let mut g = self.system_id.borrow_mut();
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*g = g.checked_add(1).unwrap_or(NonZeroU16::new(1).unwrap());
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SysId(*g)
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}
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}
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impl fmt::Debug for Ctx {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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f.debug_struct("Ctx")
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.field("i", &self.i)
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.field("system_id", &self.system_id)
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.finish_non_exhaustive()
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}
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}
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