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https://github.com/denoland/deno.git
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129 lines
2.9 KiB
Rust
129 lines
2.9 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::AnyError;
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use deno_core::OpState;
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use deno_core::ZeroCopyBuf;
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use std::cell::RefCell;
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use std::rc::Rc;
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#[cfg(unix)]
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use deno_core::error::bad_resource_id;
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#[cfg(unix)]
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use deno_core::AsyncRefCell;
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#[cfg(unix)]
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use deno_core::CancelFuture;
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#[cfg(unix)]
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use deno_core::CancelHandle;
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#[cfg(unix)]
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use deno_core::RcRef;
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#[cfg(unix)]
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use deno_core::Resource;
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#[cfg(unix)]
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use deno_core::ResourceId;
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#[cfg(unix)]
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use std::borrow::Cow;
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#[cfg(unix)]
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use tokio::signal::unix::{signal, Signal, SignalKind};
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pub fn init(rt: &mut deno_core::JsRuntime) {
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super::reg_json_sync(rt, "op_signal_bind", op_signal_bind);
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super::reg_json_sync(rt, "op_signal_unbind", op_signal_unbind);
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super::reg_json_async(rt, "op_signal_poll", op_signal_poll);
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}
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#[cfg(unix)]
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/// The resource for signal stream.
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/// The second element is the waker of polling future.
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struct SignalStreamResource {
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signal: AsyncRefCell<Signal>,
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cancel: CancelHandle,
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}
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#[cfg(unix)]
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impl Resource for SignalStreamResource {
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fn name(&self) -> Cow<str> {
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"signal".into()
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}
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fn close(self: Rc<Self>) {
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self.cancel.cancel();
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}
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}
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#[cfg(unix)]
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#[allow(clippy::unnecessary_wraps)]
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fn op_signal_bind(
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state: &mut OpState,
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signo: i32,
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<ResourceId, AnyError> {
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super::check_unstable(state, "Deno.signal");
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let resource = SignalStreamResource {
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signal: AsyncRefCell::new(signal(SignalKind::from_raw(signo)).expect("")),
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cancel: Default::default(),
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};
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let rid = state.resource_table.add(resource);
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Ok(rid)
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}
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#[cfg(unix)]
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async fn op_signal_poll(
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state: Rc<RefCell<OpState>>,
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rid: ResourceId,
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<bool, AnyError> {
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super::check_unstable2(&state, "Deno.signal");
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let resource = state
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.borrow_mut()
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.resource_table
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.get::<SignalStreamResource>(rid)
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.ok_or_else(bad_resource_id)?;
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let cancel = RcRef::map(&resource, |r| &r.cancel);
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let mut signal = RcRef::map(&resource, |r| &r.signal).borrow_mut().await;
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match signal.recv().or_cancel(cancel).await {
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Ok(result) => Ok(result.is_none()),
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Err(_) => Ok(true),
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}
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}
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#[cfg(unix)]
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pub fn op_signal_unbind(
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state: &mut OpState,
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rid: ResourceId,
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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super::check_unstable(state, "Deno.signal");
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state
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.resource_table
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.close(rid)
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.ok_or_else(bad_resource_id)?;
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Ok(())
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}
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#[cfg(not(unix))]
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pub fn op_signal_bind(
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_state: &mut OpState,
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_args: (),
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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unimplemented!();
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}
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#[cfg(not(unix))]
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fn op_signal_unbind(
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_state: &mut OpState,
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_args: (),
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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unimplemented!();
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}
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#[cfg(not(unix))]
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async fn op_signal_poll(
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_state: Rc<RefCell<OpState>>,
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_args: (),
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_zero_copy: Option<ZeroCopyBuf>,
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) -> Result<(), AnyError> {
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unimplemented!();
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}
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