mirror of
https://github.com/denoland/deno.git
synced 2024-11-21 15:04:11 -05:00
127 lines
3.2 KiB
Rust
127 lines
3.2 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
|
|
|
|
mod in_memory_broadcast_channel;
|
|
|
|
pub use in_memory_broadcast_channel::InMemoryBroadcastChannel;
|
|
|
|
use async_trait::async_trait;
|
|
use deno_core::error::AnyError;
|
|
use deno_core::include_js_files;
|
|
use deno_core::op_async;
|
|
use deno_core::op_sync;
|
|
use deno_core::Extension;
|
|
use deno_core::OpState;
|
|
use deno_core::Resource;
|
|
use deno_core::ResourceId;
|
|
use deno_core::ZeroCopyBuf;
|
|
use std::cell::RefCell;
|
|
use std::path::PathBuf;
|
|
use std::rc::Rc;
|
|
|
|
#[async_trait]
|
|
pub trait BroadcastChannel: Clone {
|
|
type Resource: Resource;
|
|
|
|
fn subscribe(&self) -> Result<Self::Resource, AnyError>;
|
|
|
|
fn unsubscribe(&self, resource: &Self::Resource) -> Result<(), AnyError>;
|
|
|
|
async fn send(
|
|
&self,
|
|
resource: &Self::Resource,
|
|
name: String,
|
|
data: Vec<u8>,
|
|
) -> Result<(), AnyError>;
|
|
|
|
async fn recv(
|
|
&self,
|
|
resource: &Self::Resource,
|
|
) -> Result<Option<Message>, AnyError>;
|
|
}
|
|
|
|
pub type Message = (String, Vec<u8>);
|
|
|
|
struct Unstable(bool); // --unstable
|
|
|
|
pub fn op_broadcast_subscribe<BC: BroadcastChannel + 'static>(
|
|
state: &mut OpState,
|
|
_: (),
|
|
_: (),
|
|
) -> Result<ResourceId, AnyError> {
|
|
let unstable = state.borrow::<Unstable>().0;
|
|
|
|
if !unstable {
|
|
eprintln!(
|
|
"Unstable API 'BroadcastChannel'. The --unstable flag must be provided.",
|
|
);
|
|
std::process::exit(70);
|
|
}
|
|
|
|
let bc = state.borrow::<BC>();
|
|
let resource = bc.subscribe()?;
|
|
Ok(state.resource_table.add(resource))
|
|
}
|
|
|
|
pub fn op_broadcast_unsubscribe<BC: BroadcastChannel + 'static>(
|
|
state: &mut OpState,
|
|
rid: ResourceId,
|
|
_buf: (),
|
|
) -> Result<(), AnyError> {
|
|
let resource = state.resource_table.get::<BC::Resource>(rid)?;
|
|
let bc = state.borrow::<BC>();
|
|
bc.unsubscribe(&resource)
|
|
}
|
|
|
|
pub async fn op_broadcast_send<BC: BroadcastChannel + 'static>(
|
|
state: Rc<RefCell<OpState>>,
|
|
(rid, name): (ResourceId, String),
|
|
buf: ZeroCopyBuf,
|
|
) -> Result<(), AnyError> {
|
|
let resource = state.borrow().resource_table.get::<BC::Resource>(rid)?;
|
|
let bc = state.borrow().borrow::<BC>().clone();
|
|
bc.send(&resource, name, buf.to_vec()).await
|
|
}
|
|
|
|
pub async fn op_broadcast_recv<BC: BroadcastChannel + 'static>(
|
|
state: Rc<RefCell<OpState>>,
|
|
rid: ResourceId,
|
|
_: (),
|
|
) -> Result<Option<Message>, AnyError> {
|
|
let resource = state.borrow().resource_table.get::<BC::Resource>(rid)?;
|
|
let bc = state.borrow().borrow::<BC>().clone();
|
|
bc.recv(&resource).await
|
|
}
|
|
|
|
pub fn init<BC: BroadcastChannel + 'static>(
|
|
bc: BC,
|
|
unstable: bool,
|
|
) -> Extension {
|
|
Extension::builder()
|
|
.js(include_js_files!(
|
|
prefix "deno:ext/broadcast_channel",
|
|
"01_broadcast_channel.js",
|
|
))
|
|
.ops(vec![
|
|
(
|
|
"op_broadcast_subscribe",
|
|
op_sync(op_broadcast_subscribe::<BC>),
|
|
),
|
|
(
|
|
"op_broadcast_unsubscribe",
|
|
op_sync(op_broadcast_unsubscribe::<BC>),
|
|
),
|
|
("op_broadcast_send", op_async(op_broadcast_send::<BC>)),
|
|
("op_broadcast_recv", op_async(op_broadcast_recv::<BC>)),
|
|
])
|
|
.state(move |state| {
|
|
state.put(bc.clone());
|
|
state.put(Unstable(unstable));
|
|
Ok(())
|
|
})
|
|
.build()
|
|
}
|
|
|
|
pub fn get_declaration() -> PathBuf {
|
|
PathBuf::from(env!("CARGO_MANIFEST_DIR"))
|
|
.join("lib.deno_broadcast_channel.d.ts")
|
|
}
|