1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use deno_core::error::AnyError;
use deno_core::serde_json::Value;
use deno_core::BufVec;
use deno_core::OpState;
use deno_core::ZeroCopyBuf;
use std::cell::RefCell;
use std::rc::Rc;
#[cfg(unix)]
use deno_core::error::bad_resource_id;
#[cfg(unix)]
use deno_core::serde_json;
#[cfg(unix)]
use deno_core::serde_json::json;
#[cfg(unix)]
use deno_core::AsyncRefCell;
#[cfg(unix)]
use deno_core::CancelFuture;
#[cfg(unix)]
use deno_core::CancelHandle;
#[cfg(unix)]
use deno_core::RcRef;
#[cfg(unix)]
use deno_core::Resource;
#[cfg(unix)]
use serde::Deserialize;
#[cfg(unix)]
use std::borrow::Cow;
#[cfg(unix)]
use tokio::signal::unix::{signal, Signal, SignalKind};
pub fn init(rt: &mut deno_core::JsRuntime) {
super::reg_json_sync(rt, "op_signal_bind", op_signal_bind);
super::reg_json_sync(rt, "op_signal_unbind", op_signal_unbind);
super::reg_json_async(rt, "op_signal_poll", op_signal_poll);
}
#[cfg(unix)]
/// The resource for signal stream.
/// The second element is the waker of polling future.
struct SignalStreamResource {
signal: AsyncRefCell<Signal>,
cancel: CancelHandle,
}
#[cfg(unix)]
impl Resource for SignalStreamResource {
fn name(&self) -> Cow<str> {
"signal".into()
}
fn close(self: Rc<Self>) {
self.cancel.cancel();
}
}
#[cfg(unix)]
#[derive(Deserialize)]
struct BindSignalArgs {
signo: i32,
}
#[cfg(unix)]
#[derive(Deserialize)]
struct SignalArgs {
rid: i32,
}
#[cfg(unix)]
fn op_signal_bind(
state: &mut OpState,
args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
super::check_unstable(state, "Deno.signal");
let args: BindSignalArgs = serde_json::from_value(args)?;
let resource = SignalStreamResource {
signal: AsyncRefCell::new(
signal(SignalKind::from_raw(args.signo)).expect(""),
),
cancel: Default::default(),
};
let rid = state.resource_table.add(resource);
Ok(json!({
"rid": rid,
}))
}
#[cfg(unix)]
async fn op_signal_poll(
state: Rc<RefCell<OpState>>,
args: Value,
_zero_copy: BufVec,
) -> Result<Value, AnyError> {
super::check_unstable2(&state, "Deno.signal");
let args: SignalArgs = serde_json::from_value(args)?;
let rid = args.rid as u32;
let resource = state
.borrow_mut()
.resource_table
.get::<SignalStreamResource>(rid)
.ok_or_else(bad_resource_id)?;
let cancel = RcRef::map(&resource, |r| &r.cancel);
let mut signal = RcRef::map(&resource, |r| &r.signal).borrow_mut().await;
match signal.recv().or_cancel(cancel).await {
Ok(result) => Ok(json!({ "done": result.is_none() })),
Err(_) => Ok(json!({ "done": true })),
}
}
#[cfg(unix)]
pub fn op_signal_unbind(
state: &mut OpState,
args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
super::check_unstable(state, "Deno.signal");
let args: SignalArgs = serde_json::from_value(args)?;
let rid = args.rid as u32;
state
.resource_table
.close(rid)
.ok_or_else(bad_resource_id)?;
Ok(json!({}))
}
#[cfg(not(unix))]
pub fn op_signal_bind(
_state: &mut OpState,
_args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
unimplemented!();
}
#[cfg(not(unix))]
fn op_signal_unbind(
_state: &mut OpState,
_args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<Value, AnyError> {
unimplemented!();
}
#[cfg(not(unix))]
async fn op_signal_poll(
_state: Rc<RefCell<OpState>>,
_args: Value,
_zero_copy: BufVec,
) -> Result<Value, AnyError> {
unimplemented!();
}
|
