forked from Orchid/orchid
119 lines
4.1 KiB
Rust
119 lines
4.1 KiB
Rust
use std::any::{Any, TypeId, type_name};
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use std::future::Future;
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use std::pin::Pin;
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use async_once_cell::OnceCell;
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use async_std::io::{Read, Write};
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use futures::FutureExt;
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use futures::future::LocalBoxFuture;
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use orchid_api_traits::{Coding, enc_vec};
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use orchid_base::error::OrcRes;
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use orchid_base::format::FmtUnit;
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use orchid_base::name::Sym;
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use crate::api;
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use crate::atom::{
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AtomCard, AtomCtx, AtomDynfo, AtomFactory, Atomic, AtomicFeaturesImpl, AtomicVariant, MethodSet,
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MethodSetBuilder, err_not_callable, err_not_command, get_info,
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};
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use crate::expr::Expr;
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use crate::gen_expr::{GExpr, bot};
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use crate::system::SysCtx;
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use crate::system_ctor::CtedObj;
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pub struct ThinVariant;
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impl AtomicVariant for ThinVariant {}
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impl<A: ThinAtom + Atomic<Variant = ThinVariant>> AtomicFeaturesImpl<ThinVariant> for A {
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fn _factory(self) -> AtomFactory {
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AtomFactory::new(async move |ctx| {
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let (id, _) = get_info::<A>(ctx.get::<CtedObj>().inst().card());
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let mut buf = enc_vec(&id).await;
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self.encode(Pin::new(&mut buf)).await;
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api::Atom { drop: None, data: buf, owner: ctx.sys_id() }
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})
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}
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fn _info() -> Self::_Info { ThinAtomDynfo { msbuild: Self::reg_reqs(), ms: OnceCell::new() } }
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type _Info = ThinAtomDynfo<Self>;
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}
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pub struct ThinAtomDynfo<T: ThinAtom> {
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msbuild: MethodSetBuilder<T>,
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ms: OnceCell<MethodSet<T>>,
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}
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impl<T: ThinAtom> AtomDynfo for ThinAtomDynfo<T> {
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fn print<'a>(&self, AtomCtx(buf, _, ctx): AtomCtx<'a>) -> LocalBoxFuture<'a, FmtUnit> {
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Box::pin(async move { T::decode(Pin::new(&mut &buf[..])).await.print(ctx).await })
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}
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fn tid(&self) -> TypeId { TypeId::of::<T>() }
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fn name(&self) -> &'static str { type_name::<T>() }
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fn decode<'a>(&'a self, AtomCtx(buf, ..): AtomCtx<'a>) -> LocalBoxFuture<'a, Box<dyn Any>> {
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Box::pin(async { Box::new(T::decode(Pin::new(&mut &buf[..])).await) as Box<dyn Any> })
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}
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fn call<'a>(&'a self, AtomCtx(buf, ..): AtomCtx<'a>, arg: Expr) -> LocalBoxFuture<'a, GExpr> {
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Box::pin(async move { T::decode(Pin::new(&mut &buf[..])).await.call(arg).await })
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}
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fn call_ref<'a>(&'a self, AtomCtx(buf, ..): AtomCtx<'a>, arg: Expr) -> LocalBoxFuture<'a, GExpr> {
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Box::pin(async move { T::decode(Pin::new(&mut &buf[..])).await.call(arg).await })
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}
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fn handle_req<'a, 'm1: 'a, 'm2: 'a>(
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&'a self,
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AtomCtx(buf, _, sys): AtomCtx<'a>,
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key: Sym,
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req: Pin<&'m1 mut dyn Read>,
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rep: Pin<&'m2 mut dyn Write>,
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) -> LocalBoxFuture<'a, bool> {
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Box::pin(async move {
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let ms = self.ms.get_or_init(self.msbuild.pack(sys.clone())).await;
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ms.dispatch(&T::decode(Pin::new(&mut &buf[..])).await, sys, key, req, rep).await
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})
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}
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fn command<'a>(
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&'a self,
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AtomCtx(buf, _, ctx): AtomCtx<'a>,
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) -> LocalBoxFuture<'a, OrcRes<Option<GExpr>>> {
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async move { T::decode(Pin::new(&mut &buf[..])).await.command(ctx).await }.boxed_local()
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}
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fn serialize<'a, 'b: 'a>(
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&'a self,
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ctx: AtomCtx<'a>,
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write: Pin<&'b mut dyn Write>,
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) -> LocalBoxFuture<'a, Option<Vec<Expr>>> {
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Box::pin(async {
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T::decode(Pin::new(&mut &ctx.0[..])).await.encode(write).await;
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Some(Vec::new())
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})
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}
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fn deserialize<'a>(
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&'a self,
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ctx: SysCtx,
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data: &'a [u8],
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refs: &'a [Expr],
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) -> LocalBoxFuture<'a, api::Atom> {
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assert!(refs.is_empty(), "Refs found when deserializing thin atom");
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Box::pin(async { T::decode(Pin::new(&mut &data[..])).await._factory().build(ctx).await })
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}
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fn drop<'a>(&'a self, AtomCtx(buf, _, ctx): AtomCtx<'a>) -> LocalBoxFuture<'a, ()> {
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Box::pin(async move {
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let string_self = T::decode(Pin::new(&mut &buf[..])).await.print(ctx.clone()).await;
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writeln!(ctx.logger(), "Received drop signal for non-drop atom {string_self:?}");
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})
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}
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}
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pub trait ThinAtom:
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AtomCard<Data = Self> + Atomic<Variant = ThinVariant> + Coding + Send + Sync + 'static
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{
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#[allow(unused_variables)]
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fn call(&self, arg: Expr) -> impl Future<Output = GExpr> {
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async move { bot(err_not_callable(arg.ctx().i()).await) }
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}
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#[allow(unused_variables)]
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fn command(&self, ctx: SysCtx) -> impl Future<Output = OrcRes<Option<GExpr>>> {
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async move { Err(err_not_command(ctx.i()).await) }
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}
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#[allow(unused_variables)]
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fn print(&self, ctx: SysCtx) -> impl Future<Output = FmtUnit> {
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async { format!("ThinAtom({})", type_name::<Self>()).into() }
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}
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}
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