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
157
158
159
160
161
162
163
164
165
166
167
168
#![doc(hidden)]
use std::{
os::{
fd::FromRawFd,
unix::io::{OwnedFd, RawFd},
},
pin::Pin,
task::Poll,
};
use super::traits::{buf::AsyncBufReadWithFd, AsyncReadWithFd, AsyncWriteWithFd, OwnedFds};
use crate::traits;
#[derive(Default, Debug)]
pub struct WritePool {
inner: Vec<u8>,
fds: Vec<OwnedFd>,
}
impl futures_lite::AsyncWrite for WritePool {
fn poll_write(
mut self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
buf: &[u8],
) -> Poll<std::io::Result<usize>> {
self.inner.extend_from_slice(buf);
Poll::Ready(Ok(buf.len()))
}
fn poll_flush(
self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
) -> Poll<std::io::Result<()>> {
Poll::Ready(Ok(()))
}
fn poll_close(
self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
) -> Poll<std::io::Result<()>> {
Poll::Ready(Ok(()))
}
}
impl AsyncWriteWithFd for WritePool {
fn poll_write_with_fds<Fds: traits::OwnedFds>(
mut self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
buf: &[u8],
fds: &mut Fds,
) -> Poll<std::io::Result<usize>> {
self.inner.extend_from_slice(buf);
fds.take(&mut self.fds);
Poll::Ready(Ok(buf.len()))
}
}
impl WritePool {
pub fn new() -> Self {
Self {
inner: Vec::new(),
fds: Vec::new(),
}
}
pub fn into_inner(self) -> (Vec<u8>, Vec<OwnedFd>) {
(self.inner, self.fds)
}
}
#[derive(Debug)]
pub struct ReadPool {
inner: Vec<u8>,
fds: Vec<RawFd>,
}
impl std::io::Read for ReadPool {
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
let len = std::cmp::min(buf.len(), self.inner.len());
buf[..len].copy_from_slice(&self.inner[..len]);
self.inner.drain(..len);
Ok(len)
}
}
impl futures_lite::AsyncRead for ReadPool {
fn poll_read(
mut self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
buf: &mut [u8],
) -> Poll<std::io::Result<usize>> {
use std::io::Read;
std::task::Poll::Ready(self.read(buf))
}
}
impl futures_lite::AsyncBufRead for ReadPool {
fn poll_fill_buf(
self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
) -> Poll<std::io::Result<&[u8]>> {
Poll::Ready(Ok(self.get_mut().inner.as_slice()))
}
fn consume(mut self: Pin<&mut Self>, amt: usize) {
self.inner.drain(..amt);
}
}
unsafe impl AsyncBufReadWithFd for ReadPool {
fn poll_fill_buf_until<'a>(
self: Pin<&'a mut Self>,
_cx: &mut std::task::Context<'_>,
len: usize,
) -> Poll<std::io::Result<()>> {
if len > self.inner.len() {
Poll::Ready(Err(std::io::Error::new(
std::io::ErrorKind::UnexpectedEof,
"Unexpected EOF",
)))
} else {
Poll::Ready(Ok(()))
}
}
fn fds(&self) -> &[RawFd] {
&self.fds[..]
}
fn buffer(&self) -> &[u8] {
&self.inner[..]
}
fn consume(mut self: Pin<&mut Self>, amt: usize, amt_fd: usize) {
self.inner.drain(..amt);
self.fds.drain(..amt_fd);
}
}
impl AsyncReadWithFd for ReadPool {
fn poll_read_with_fds<Fds: OwnedFds>(
mut self: Pin<&mut Self>,
_cx: &mut std::task::Context<'_>,
buf: &mut [u8],
fds: &mut Fds,
) -> Poll<std::io::Result<usize>> {
use std::io::Read;
let len = self.read(buf).unwrap();
let fd_len = std::cmp::min(fds.len(), self.fds.len());
fds.extend(
self.fds
.drain(..fd_len)
.map(|fd| unsafe { OwnedFd::from_raw_fd(fd) }),
);
Poll::Ready(Ok(len))
}
}
impl ReadPool {
pub fn new(data: Vec<u8>, fds: Vec<RawFd>) -> Self {
Self { inner: data, fds }
}
pub fn is_eof(&self) -> bool {
self.inner.is_empty() && self.fds.is_empty()
}
}