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use crate::{
BufResult, api::resource::Resource, buf::BufLike, typed_op::TypedOp,
};
pub struct Send<B>
where
B: std::marker::Send + std::marker::Sync,
{
res: Resource,
buf: Option<B>,
flags: i32,
}
impl<B> Send<B>
where
B: std::marker::Send + std::marker::Sync,
{
pub(crate) fn new(res: Resource, buf: B, flags: Option<i32>) -> Self {
Self { res, buf: Some(buf), flags: flags.unwrap_or(0) }
}
pub fn to_op(mut self) -> crate::op::Op
where
B: BufLike + 'static,
{
let buffer = self.buf.take().expect("buffer already taken");
crate::op::Op::Send {
fd: self.res,
flags: self.flags,
buffer: crate::op::OpBuf::new(buffer),
}
}
}
impl<B> TypedOp for Send<B>
where
B: BufLike + std::marker::Send + std::marker::Sync + 'static,
{
type Result = BufResult<i32, B>;
fn into_op(&mut self) -> crate::op::Op {
let slice = self.buf.as_ref().expect("buffer not available").buf();
let ptr = slice.as_ptr() as *mut u8;
let len = slice.len();
crate::op::Op::Send {
fd: self.res.clone(),
flags: self.flags,
buffer: crate::op::OpBuf::new(crate::op::RawBuf { ptr, len }),
}
}
fn extract_result(self, res: isize) -> Self::Result {
let buf = self.buf.expect("buffer not available");
if res < 0 {
// On error, return buffer unchanged
(Err(std::io::Error::from_raw_os_error((-res) as i32)), buf)
} else {
// On success, advance buffer past sent bytes
(Ok(res as i32), buf.after(res as usize))
}
}
// #[cfg(unix)]
// fn meta(&self) -> crate::operation::OpMeta {
// crate::operation::OpMeta::CAP_FD | crate::operation::OpMeta::FD_WRITE
// }
// #[cfg(unix)]
// fn cap(&self) -> i32 {
// self.res.as_raw_fd()
// }
// #[cfg(linux)]
// fn create_entry(&self) -> lio_uring::submission::Entry {
// use std::os::fd::AsRawFd;
// let buf_slice = self.buf.as_ref().unwrap().buf();
// let ptr = buf_slice.as_ptr();
// let len = buf_slice.len();
// lio_uring::operation::Send::new(self.res.as_raw_fd(), ptr, len as u32)
// .flags(self.flags)
// .build()
// }
// fn run_blocking(&self) -> isize {
// use std::os::fd::AsRawFd;
// let buf_slice = self.buf.as_ref().unwrap().buf();
// let ptr = buf_slice.as_ptr();
// let len = buf_slice.len();
// syscall!(raw send(self.res.as_raw_fd(), ptr as *mut _, len, self.flags))
// }
}