102 lines
2.5 KiB
Rust
102 lines
2.5 KiB
Rust
use {
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crate::{
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io_uring::{
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IoUring, IoUringData, IoUringError, IoUringTaskId, Task, TaskResultExt,
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pending_result::PendingResult,
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sys::{IORING_OP_READ, IORING_OP_WRITE, io_uring_sqe},
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},
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time::Time,
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utils::buf::Buf,
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},
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std::rc::Rc,
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uapi::{OwnedFd, c},
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};
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impl IoUring {
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pub async fn read(&self, fd: &Rc<OwnedFd>, buf: Buf) -> Result<usize, IoUringError> {
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self.perform(fd, buf, None, IORING_OP_READ).await
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}
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pub async fn write(
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&self,
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fd: &Rc<OwnedFd>,
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buf: Buf,
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timeout: Option<Time>,
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) -> Result<usize, IoUringError> {
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self.perform(fd, buf, timeout, IORING_OP_WRITE).await
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}
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async fn perform(
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&self,
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fd: &Rc<OwnedFd>,
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buf: Buf,
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timeout: Option<Time>,
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opcode: u8,
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) -> Result<usize, IoUringError> {
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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_read_writes.pop().unwrap_or_default();
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pw.opcode = opcode;
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pw.id = id.id;
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pw.has_timeout = timeout.is_some();
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pw.fd = fd.raw();
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pw.buf = buf.as_ptr() as _;
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pw.len = buf.len();
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pw.data = Some(ReadWriteTaskData {
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_fd: fd.clone(),
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_buf: buf,
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res: pr.clone(),
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});
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self.ring.schedule(pw);
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if let Some(time) = timeout {
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self.schedule_timeout_link(time);
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}
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}
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Ok(pr.await.map(|v| v as usize)).merge()
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}
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}
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struct ReadWriteTaskData {
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_fd: Rc<OwnedFd>,
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_buf: Buf,
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res: PendingResult,
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}
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#[derive(Default)]
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pub struct ReadWriteTask {
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id: IoUringTaskId,
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has_timeout: bool,
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fd: c::c_int,
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buf: usize,
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len: usize,
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data: Option<ReadWriteTaskData>,
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opcode: u8,
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}
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unsafe impl Task for ReadWriteTask {
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fn id(&self) -> IoUringTaskId {
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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.res.complete(res);
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}
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ring.cached_read_writes.push(self);
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}
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fn encode(&self, sqe: &mut io_uring_sqe) {
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sqe.opcode = self.opcode;
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sqe.fd = self.fd as _;
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sqe.u1.off = !0;
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sqe.u2.addr = self.buf as _;
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sqe.u3.rw_flags = 0;
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sqe.len = self.len as _;
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}
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fn has_timeout(&self) -> bool {
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self.has_timeout
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}
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}
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