71 lines
1.8 KiB
Rust
71 lines
1.8 KiB
Rust
use {
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crate::io_uring::{
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ops::TaskResult,
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pending_result::PendingResult,
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sys::{io_uring_sqe, IORING_OP_POLL_ADD},
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IoUring, IoUringData, IoUringError, Task, TaskResultExt,
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},
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std::rc::Rc,
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uapi::{c, OwnedFd},
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};
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impl IoUring {
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pub async fn poll(&self, fd: &Rc<OwnedFd>, events: c::c_short) -> TaskResult<c::c_short> {
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self.ring.check_destroyed()?;
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let id = self.ring.id();
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let pr = self.ring.pending_results.acquire();
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{
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let mut pw = self.ring.cached_polls.pop().unwrap_or_default();
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pw.id = id.id;
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pw.fd = fd.raw() as _;
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pw.events = events as _;
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pw.data = Some(Data {
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pr: pr.clone(),
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_fd: fd.clone(),
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});
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self.ring.schedule(pw);
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}
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Ok(pr.await.map(|v| v as c::c_short))
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}
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pub async fn readable(&self, fd: &Rc<OwnedFd>) -> Result<c::c_short, IoUringError> {
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self.poll(fd, c::POLLIN).await.merge()
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}
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#[expect(dead_code)]
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pub async fn writable(&self, fd: &Rc<OwnedFd>) -> Result<c::c_short, IoUringError> {
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self.poll(fd, c::POLLOUT).await.merge()
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}
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}
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struct Data {
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pr: PendingResult,
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_fd: Rc<OwnedFd>,
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}
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#[derive(Default)]
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pub struct PollTask {
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id: u64,
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events: u16,
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fd: i32,
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data: Option<Data>,
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}
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unsafe impl Task for PollTask {
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fn id(&self) -> u64 {
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self.id
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}
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fn complete(mut self: Box<Self>, ring: &IoUringData, res: i32) {
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if let Some(data) = self.data.take() {
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data.pr.complete(res);
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}
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ring.cached_polls.push(self);
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}
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fn encode(&self, sqe: &mut io_uring_sqe) {
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sqe.opcode = IORING_OP_POLL_ADD;
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sqe.fd = self.fd;
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sqe.u3.poll_events = self.events;
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}
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}
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