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|
use super::*;
pub(super) fn start_endpoint_transport(
stream: LocalStream,
lifetime: impl Send + 'static,
event_tx: &tokio::sync::mpsc::Sender<ClientLoopEvent>,
endpoint_id: endpoint::ClientEndpointId,
generation: u64,
max_frame_size: usize,
) -> Result<endpoint::NativeEndpointTransport, ClientError> {
let reader = stream.try_clone().map_err(ClientError::ConnectionFailed)?;
let transport = endpoint::NativeEndpointTransport::with_lifetime(stream, lifetime)
.map_err(ClientError::ConnectionFailed)?;
let stopped = transport.stop_handle();
let event_tx = event_tx.clone();
std::thread::Builder::new()
.name("endpoint-reader".into())
.spawn(move || {
server_reader_thread(
reader,
event_tx,
&stopped,
max_frame_size,
endpoint_id,
generation,
);
})
.map_err(ClientError::ConnectionFailed)?;
Ok(transport)
}
/// Reads complete frames while retaining partial-read progress across nonblocking polls.
pub(super) fn server_reader_thread(
mut stream: LocalStream,
event_tx: tokio::sync::mpsc::Sender<ClientLoopEvent>,
should_quit: &Arc<AtomicBool>,
max_frame_size: usize,
endpoint_id: endpoint::ClientEndpointId,
generation: u64,
) {
if stream.set_nonblocking(true).is_err() {
let _ = event_tx.blocking_send(ClientLoopEvent::ServerDisconnected {
endpoint_id,
generation,
});
return;
}
let mut stream = EndpointReader {
stream: &mut stream,
stopped: should_quit,
};
loop {
if should_quit.load(Ordering::Acquire) {
break;
}
match protocol::read_message(&mut stream, max_frame_size) {
Ok(msg) => {
if event_tx
.blocking_send(ClientLoopEvent::ServerMessage {
endpoint_id: endpoint_id.clone(),
generation,
message: Box::new(msg),
})
.is_err()
{
break;
}
}
Err(protocol::FramingError::UnexpectedEof) => {
let _ = event_tx.blocking_send(ClientLoopEvent::ServerDisconnected {
endpoint_id: endpoint_id.clone(),
generation,
});
break;
}
Err(protocol::FramingError::Io(err)) if err.kind() == io::ErrorKind::WouldBlock => {
std::thread::sleep(Duration::from_millis(1));
}
Err(err) => {
warn!(err = %err, "server read error");
let _ = event_tx.blocking_send(ClientLoopEvent::ServerDisconnected {
endpoint_id: endpoint_id.clone(),
generation,
});
break;
}
}
}
}
struct EndpointReader<'a> {
stream: &'a mut LocalStream,
stopped: &'a AtomicBool,
}
impl io::Read for EndpointReader<'_> {
fn read(&mut self, buffer: &mut [u8]) -> io::Result<usize> {
loop {
if self.stopped.load(Ordering::Acquire) {
return Ok(0);
}
match crate::ipc::poll_local_stream_read_count(self.stream, buffer)? {
crate::ipc::LocalStreamReadCount::Data(count) => return Ok(count),
crate::ipc::LocalStreamReadCount::Closed => return Ok(0),
crate::ipc::LocalStreamReadCount::Pending => {
crate::platform::wait_client_stream_readable(self.stream)?;
}
}
}
}
}
pub(in crate::client) fn write_to_local_server(
stream: &mut LocalStream,
msg: &ClientMessage,
) -> io::Result<()> {
protocol::write_message(stream, msg).map_err(|error| io::Error::other(error.to_string()))
}
pub(super) trait ClientMessageSink {
fn send_client_message(&mut self, message: &ClientMessage) -> io::Result<()>;
}
impl ClientMessageSink for LocalStream {
fn send_client_message(&mut self, message: &ClientMessage) -> io::Result<()> {
write_to_local_server(self, message)
}
}
impl ClientMessageSink for endpoint::EndpointRegistry {
fn send_client_message(&mut self, message: &ClientMessage) -> io::Result<()> {
// The lifecycle loop consumes failures for every endpoint, including Local. A send
// failure must not bypass that transition or tear down unrelated connections.
self.send(message);
Ok(())
}
}
pub(super) fn write_to_server(
stream: &mut impl ClientMessageSink,
msg: &ClientMessage,
) -> io::Result<()> {
stream.send_client_message(msg)
}
|
