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pub mod iced_gui;
pub mod shm_reader;
use crate::ui::ipc::{ControlMessage, IpcMessage};
use shm_reader::ShmReader;
pub fn run_gui_subprocess(
socket_path: &str,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
#[cfg(windows)]
use named_pipe::{PipeOptions, PipeServer};
use std::io::{Read, Write};
#[cfg(unix)]
use std::os::unix::net::UnixListener;
use std::sync::mpsc;
use std::sync::{Arc, Mutex};
use std::thread;
use std::time::{Duration, Instant};
#[cfg(unix)]
let listener = UnixListener::bind(socket_path)?;
#[cfg(windows)]
let listener = {
let pipe_name = format!(
r"\\.\pipe\{}",
socket_path.replace('/', "_").replace('\\', "_")
);
PipeOptions::new(pipe_name.as_str()).single()?
};
// Channel for GUI updates (IPC -> GUI)
let (update_sender, update_receiver) = mpsc::channel();
let update_receiver = Arc::new(Mutex::new(update_receiver));
// Channel for control messages (GUI -> IPC)
let (control_sender, control_receiver) = mpsc::channel::<ControlMessage>();
let control_receiver = Arc::new(Mutex::new(control_receiver));
let socket_path_clone = socket_path.to_string();
#[cfg(unix)]
let stream = {
if let Ok((stream, _)) = listener.accept() {
Some(Arc::new(Mutex::new(stream)))
} else {
None
}
};
#[cfg(windows)]
let stream = {
match listener.wait() {
Ok(stream) => Some(Arc::new(Mutex::<PipeServer>::new(stream))),
Err(_) => None,
}
};
if let Some(stream) = stream {
let mut init_buffer = vec![0u8; 1024 * 1024];
let mut len_bytes = [0u8; 8];
{
let mut stream_guard = stream.lock().unwrap();
stream_guard.read_exact(&mut len_bytes)?;
}
let len = u64::from_le_bytes(len_bytes) as usize;
if len > init_buffer.len() {
init_buffer.resize(len, 0);
}
{
let mut stream_guard = stream.lock().unwrap();
stream_guard.read_exact(&mut init_buffer[..len])?;
}
let init_msg: IpcMessage = bincode::deserialize(&init_buffer[..len])?;
if let IpcMessage::Init(init) = init_msg {
let shm_path = init.shm_path.clone();
let shm_size = init.shm_size;
// Send Ready signal immediately - before spawning reader thread
{
let msg = IpcMessage::Ready;
let serialized = bincode::serialize(&msg)?;
let len = serialized.len() as u64;
let mut stream_guard = stream.lock().unwrap();
stream_guard.write_all(&len.to_le_bytes())?;
stream_guard.write_all(&serialized)?;
stream_guard.flush()?;
}
let stream_for_read = stream.clone();
let stream_for_control = stream.clone();
let update_sender_clone = update_sender.clone();
let control_receiver_clone = control_receiver.clone();
// Thread to read updates from simulation
thread::spawn(move || {
let debug = std::env::var("RGROW_DEBUG_PERF").is_ok();
if debug {
eprintln!(
"[IPC-thread] Starting, shm_path={}, shm_size={}",
shm_path, shm_size
);
}
let mut buffer = vec![0u8; 1024 * 64];
let shm_reader = match ShmReader::open(&shm_path, shm_size) {
Ok(r) => {
if debug {
eprintln!("[IPC-thread] Shared memory opened successfully");
}
r
}
Err(e) => {
eprintln!("[IPC-thread] Failed to open shared memory: {}", e);
return;
}
};
loop {
let t0 = Instant::now();
let mut len_bytes = [0u8; 8];
let mut stream_guard = stream_for_read.lock().unwrap();
if stream_guard.read_exact(&mut len_bytes).is_err() {
break;
}
let len = u64::from_le_bytes(len_bytes) as usize;
if len > buffer.len() {
buffer.resize(len, 0);
}
if stream_guard.read_exact(&mut buffer[..len]).is_err() {
break;
}
drop(stream_guard);
let t_read = t0.elapsed();
let t1 = Instant::now();
match bincode::deserialize::<IpcMessage>(&buffer[..len]) {
Ok(msg) => {
let t_deser = t1.elapsed();
let msg_to_send = match &msg {
IpcMessage::Update(notif) => {
let t_shm = Instant::now();
let frame_data = shm_reader.read(notif.data_len).to_vec();
let t_shm_elapsed = t_shm.elapsed();
if debug {
eprintln!(
"[IPC-recv] read: {:?}, deser: {:?}, shm read: {:?}, size: {} bytes",
t_read, t_deser, t_shm_elapsed, notif.data_len
);
}
iced_gui::GuiMessage::Update {
frame_data,
frame_width: notif.frame_width,
frame_height: notif.frame_height,
time: notif.time,
total_events: notif.total_events,
n_tiles: notif.n_tiles,
mismatches: notif.mismatches,
energy: notif.energy,
}
}
IpcMessage::Close => iced_gui::GuiMessage::Close,
IpcMessage::Init(_) => continue,
IpcMessage::Resize(_) => continue,
IpcMessage::Ready => continue,
};
let is_close = matches!(&msg, IpcMessage::Close);
if debug {
eprintln!(
"[IPC-thread] Sending message to GUI channel, is_close={}",
is_close
);
}
if update_sender_clone.send(msg_to_send).is_err() {
if debug {
eprintln!("[IPC-thread] Failed to send to channel");
}
break;
}
if is_close {
break;
}
}
Err(e) => {
if debug {
eprintln!("[IPC-thread] Deserialize error: {}", e);
}
break;
}
}
}
#[cfg(unix)]
{
let _ = std::fs::remove_file(&socket_path_clone);
}
});
// Thread to forward control messages from GUI to simulation
thread::spawn(move || {
let debug = std::env::var("RGROW_DEBUG_PERF").is_ok();
loop {
let control_msg = {
let control_recv = control_receiver_clone.lock().unwrap();
match control_recv.try_recv() {
Ok(msg) => Some(msg),
Err(mpsc::TryRecvError::Empty) => {
drop(control_recv);
std::thread::sleep(Duration::from_millis(10));
continue;
}
Err(mpsc::TryRecvError::Disconnected) => {
break;
}
}
};
if let Some(control_msg) = control_msg {
if debug {
eprintln!(
"[Control-thread] Sending control message: {:?}",
control_msg
);
}
if let Ok(serialized) = bincode::serialize(&control_msg) {
let len = serialized.len() as u64;
let mut stream_guard = stream_for_control.lock().unwrap();
if stream_guard.write_all(&len.to_le_bytes()).is_err() {
break;
}
if stream_guard.write_all(&serialized).is_err() {
break;
}
let _ = stream_guard.flush();
}
}
}
});
iced_gui::run_gui(update_receiver, control_sender, init)?;
}
}
Ok(())
}