compio-process 0.9.0

Processes for compio
Documentation 
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

use std::{io, process};

use compio_buf::{BufResult, IntoInner, IoBuf, IoBufMut};
use compio_driver::{
    BufferRef, ResultTakeBuffer, ToSharedFd,
    op::{BufResultExt, Read, ReadManaged, Write},
};
use compio_io::{AsyncRead, AsyncReadManaged, AsyncWrite};
use compio_runtime::{ResumeUnwind, Runtime};

use crate::{ChildStderr, ChildStdin, ChildStdout};

pub async fn child_wait(mut child: process::Child) -> io::Result<process::ExitStatus> {
    compio_runtime::spawn_blocking(move || child.wait())
        .await
        .resume_unwind()
        .expect("shouldn't be cancelled")
}

impl AsyncRead for ChildStdout {
    async fn read<B: IoBufMut>(&mut self, buffer: B) -> BufResult<usize, B> {
        let fd = self.to_shared_fd();
        let op = Read::new(fd, buffer);
        let res = compio_runtime::submit(op).await.into_inner();
        unsafe { res.map_advanced() }
    }
}

impl AsyncReadManaged for ChildStdout {
    type Buffer = BufferRef;

    async fn read_managed(&mut self, len: usize) -> io::Result<Option<Self::Buffer>> {
        let fd = self.to_shared_fd();
        let res = Runtime::with_current(|rt| {
            let buffer_pool = rt.buffer_pool()?;
            let op = ReadManaged::new(fd, &buffer_pool, len)?;
            io::Result::Ok(rt.submit(op))
        })?
        .await;
        unsafe { res.take_buffer() }
    }
}

impl AsyncRead for ChildStderr {
    async fn read<B: IoBufMut>(&mut self, buffer: B) -> BufResult<usize, B> {
        let fd = self.to_shared_fd();
        let op = Read::new(fd, buffer);
        let res = compio_runtime::submit(op).await.into_inner();
        unsafe { res.map_advanced() }
    }
}

impl AsyncReadManaged for ChildStderr {
    type Buffer = BufferRef;

    async fn read_managed(&mut self, len: usize) -> io::Result<Option<Self::Buffer>> {
        let fd = self.to_shared_fd();
        let res = Runtime::with_current(|rt| {
            let buffer_pool = rt.buffer_pool()?;
            let op = ReadManaged::new(fd, &buffer_pool, len)?;
            io::Result::Ok(rt.submit(op))
        })?
        .await;
        unsafe { res.take_buffer() }
    }
}

impl AsyncWrite for ChildStdin {
    async fn write<T: IoBuf>(&mut self, buffer: T) -> BufResult<usize, T> {
        let fd = self.to_shared_fd();
        let op = Write::new(fd, buffer);
        compio_runtime::submit(op).await.into_inner()
    }

    async fn flush(&mut self) -> io::Result<()> {
        Ok(())
    }

    async fn shutdown(&mut self) -> io::Result<()> {
        Ok(())
    }
}