mirror of
https://github.com/denoland/deno.git
synced 2024-12-25 00:29:09 -05:00
138 lines
3.5 KiB
Rust
138 lines
3.5 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
|
|
use super::dispatch_json::{JsonOp, Value};
|
|
use crate::op_error::OpError;
|
|
use crate::state::State;
|
|
use deno_core::*;
|
|
|
|
#[cfg(unix)]
|
|
use super::dispatch_json::Deserialize;
|
|
#[cfg(unix)]
|
|
use futures::future::{poll_fn, FutureExt};
|
|
#[cfg(unix)]
|
|
use std::task::Waker;
|
|
#[cfg(unix)]
|
|
use tokio::signal::unix::{signal, Signal, SignalKind};
|
|
|
|
pub fn init(i: &mut Isolate, s: &State) {
|
|
i.register_op("op_signal_bind", s.stateful_json_op2(op_signal_bind));
|
|
i.register_op("op_signal_unbind", s.stateful_json_op2(op_signal_unbind));
|
|
i.register_op("op_signal_poll", s.stateful_json_op2(op_signal_poll));
|
|
}
|
|
|
|
#[cfg(unix)]
|
|
/// The resource for signal stream.
|
|
/// The second element is the waker of polling future.
|
|
pub struct SignalStreamResource(pub Signal, pub Option<Waker>);
|
|
|
|
#[cfg(unix)]
|
|
#[derive(Deserialize)]
|
|
struct BindSignalArgs {
|
|
signo: i32,
|
|
}
|
|
|
|
#[cfg(unix)]
|
|
#[derive(Deserialize)]
|
|
struct SignalArgs {
|
|
rid: i32,
|
|
}
|
|
|
|
#[cfg(unix)]
|
|
fn op_signal_bind(
|
|
isolate: &mut deno_core::Isolate,
|
|
_state: &State,
|
|
args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, OpError> {
|
|
let args: BindSignalArgs = serde_json::from_value(args)?;
|
|
let mut resource_table = isolate.resource_table.borrow_mut();
|
|
let rid = resource_table.add(
|
|
"signal",
|
|
Box::new(SignalStreamResource(
|
|
signal(SignalKind::from_raw(args.signo)).expect(""),
|
|
None,
|
|
)),
|
|
);
|
|
Ok(JsonOp::Sync(json!({
|
|
"rid": rid,
|
|
})))
|
|
}
|
|
|
|
#[cfg(unix)]
|
|
fn op_signal_poll(
|
|
isolate: &mut deno_core::Isolate,
|
|
_state: &State,
|
|
args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, OpError> {
|
|
let args: SignalArgs = serde_json::from_value(args)?;
|
|
let rid = args.rid as u32;
|
|
let resource_table = isolate.resource_table.clone();
|
|
|
|
let future = poll_fn(move |cx| {
|
|
let mut resource_table = resource_table.borrow_mut();
|
|
if let Some(mut signal) =
|
|
resource_table.get_mut::<SignalStreamResource>(rid)
|
|
{
|
|
signal.1 = Some(cx.waker().clone());
|
|
return signal.0.poll_recv(cx);
|
|
}
|
|
std::task::Poll::Ready(None)
|
|
})
|
|
.then(|result| async move { Ok(json!({ "done": result.is_none() })) });
|
|
|
|
Ok(JsonOp::AsyncUnref(future.boxed_local()))
|
|
}
|
|
|
|
#[cfg(unix)]
|
|
pub fn op_signal_unbind(
|
|
isolate: &mut deno_core::Isolate,
|
|
_state: &State,
|
|
args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, OpError> {
|
|
let args: SignalArgs = serde_json::from_value(args)?;
|
|
let rid = args.rid as u32;
|
|
let mut resource_table = isolate.resource_table.borrow_mut();
|
|
let resource = resource_table.get::<SignalStreamResource>(rid);
|
|
if let Some(signal) = resource {
|
|
if let Some(waker) = &signal.1 {
|
|
// Wakes up the pending poll if exists.
|
|
// This prevents the poll future from getting stuck forever.
|
|
waker.clone().wake();
|
|
}
|
|
}
|
|
resource_table
|
|
.close(rid)
|
|
.ok_or_else(OpError::bad_resource_id)?;
|
|
Ok(JsonOp::Sync(json!({})))
|
|
}
|
|
|
|
#[cfg(not(unix))]
|
|
pub fn op_signal_bind(
|
|
_isolate: &mut deno_core::Isolate,
|
|
_state: &State,
|
|
_args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, OpError> {
|
|
unimplemented!();
|
|
}
|
|
|
|
#[cfg(not(unix))]
|
|
fn op_signal_unbind(
|
|
_isolate: &mut deno_core::Isolate,
|
|
_state: &State,
|
|
_args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, OpError> {
|
|
unimplemented!();
|
|
}
|
|
|
|
#[cfg(not(unix))]
|
|
fn op_signal_poll(
|
|
_isolate: &mut deno_core::Isolate,
|
|
_state: &State,
|
|
_args: Value,
|
|
_zero_copy: Option<ZeroCopyBuf>,
|
|
) -> Result<JsonOp, OpError> {
|
|
unimplemented!();
|
|
}
|