use std::net::ToSocketAddrs;
use std::sync::atomic::Ordering;
#[cfg(feature = "io_timeout")]
use std::time::Duration;
use std::{self, io};
use super::super::{co_io_result, IoData};
use crate::coroutine_impl::{is_coroutine, CoroutineImpl, EventSource};
use crate::io::AsIoData;
use crate::net::UdpSocket;
use crate::yield_now::yield_with_io;
pub struct UdpSendTo<'a, A: ToSocketAddrs> {
io_data: &'a IoData,
buf: &'a [u8],
socket: &'a std::net::UdpSocket,
addr: A,
#[cfg(feature = "io_timeout")]
timeout: Option<Duration>,
pub(crate) is_coroutine: bool,
}
impl<'a, A: ToSocketAddrs> UdpSendTo<'a, A> {
pub fn new(socket: &'a UdpSocket, buf: &'a [u8], addr: A) -> io::Result<Self> {
Ok(UdpSendTo {
io_data: socket.as_io_data(),
buf,
socket: socket.inner(),
addr,
#[cfg(feature = "io_timeout")]
timeout: socket.write_timeout().unwrap(),
is_coroutine: is_coroutine(),
})
}
pub fn done(&mut self) -> io::Result<usize> {
loop {
co_io_result(self.is_coroutine)?;
self.io_data.io_flag.store(false, Ordering::Relaxed);
match self.socket.send_to(self.buf, &self.addr) {
Ok(n) => return Ok(n),
Err(e) => {
let raw_err = e.raw_os_error();
if raw_err == Some(libc::EAGAIN) || raw_err == Some(libc::EWOULDBLOCK) {
} else {
return Err(e);
}
}
}
if self.io_data.io_flag.load(Ordering::Relaxed) {
continue;
}
yield_with_io(self, self.is_coroutine);
}
}
}
impl<'a, A: ToSocketAddrs> EventSource for UdpSendTo<'a, A> {
fn subscribe(&mut self, co: CoroutineImpl) {
let io_data = self.io_data;
#[cfg(feature = "io_timeout")]
if let Some(dur) = self.timeout {
crate::scheduler::get_scheduler()
.get_selector()
.add_io_timer(self.io_data, dur);
}
io_data.co.store(co);
if io_data.io_flag.load(Ordering::Acquire) {
io_data.fast_schedule();
}
}
}