forked from M-Labs/artiq-zynq
changing to semaphore heavy solution
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b485bf16a7
commit
7c2cc51ae3
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@ -4,9 +4,7 @@ use core::{cell::RefCell, fmt, slice, str};
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use core_io::Error as IoError;
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use cslice::CSlice;
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use dyld::elf;
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use futures::{future::FutureExt, select_biased};
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#[cfg(has_drtio)]
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use io::Cursor;
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use futures::{future::FutureExt, select_biased}; #[cfg(has_drtio)] use io::Cursor;
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#[cfg(has_drtio)]
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use ksupport::rpc;
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use ksupport::{kernel, resolve_channel_name};
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@ -807,135 +805,82 @@ pub fn main(timer: GlobalTimer, cfg: Config) {
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let restart_idle = Rc::new(Semaphore::new(0, 1));
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mgmt::start(cfg.clone(), restart_idle.clone());
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let semaphores = Rc::new(
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(Semaphore::new(0, 1),
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Semaphore::new(1, 1),
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Semaphore::new(1, 1),
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Semaphore::new(1, 1)));
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// handle connects
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task::spawn(async move {
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let terminate = Rc::new(Semaphore::new(0, 1));
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let running = Rc::new(Mutex::new(false));
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let repeat_lock = Rc::new(Mutex::new(false));
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let restart_idle = restart_idle.clone();
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let cfg = cfg.clone();
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let control = control.clone();
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let up_destinations = up_destinations.clone();
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let aux_mutex = aux_mutex.clone();
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let routing_table = drtio_routing_table.clone();
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// copy same idea as artiq mainline
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// loop
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// check if socket.is_active() -> accept and run kernel task
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// check if task is terminated -> run idle -> terminate idle on restart_idle
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// yield and reloop (annoying thing is if async behaves as expected)
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// start listening on a socket and return the socket
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let listener = TcpListener::new(10_000);
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listener.listen(1381);
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loop {
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if listener.can_accept() { // ie can_accept (socket in state SYN-RECEIVED)
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let mut stream = listener.accept().await;
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if connection.try_wait().is_none() {
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// there is an existing connection
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terminate.signal();
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connection.async_wait().await;
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}
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let _ = terminate.try_wait();
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task::spawn(async move {
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select_biased! {
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_ = (async {
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}) => (),
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_ = terminate.async_wait().fuse() => ()
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}
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let _ = stream.flush().await;
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let _ = stream.abort().await;
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connection.signal();
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});
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}
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if connection.try_wait().is_some() {
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let _ = terminate.try_wait(); // ensure terminate and restart_idle are always set
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let _ = restart_idle.try_wait();
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task::spawn(async move {
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select_biased! {
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_ = (async {
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// needs to ensure that if there is no idle_kernel, enter idle loop and
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// keep yielding
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}) => (),
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_ = terminate.async_wait().fuse() => (),
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_ = async {
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restart_idle.async_wait().fuse(),
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}
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}
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connection.signal();
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});
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}
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// yield and rerun
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task::r#yield().await;
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}
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select_biased! {
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_ = (async {
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loop {
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let cfg = cfg.clone();
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let control = control.clone();
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let up_destinations = up_destinations.clone();
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let aux_mutex = aux_mutex.clone();
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let routing_table = drtio_routing_table.clone();
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let terminate = terminate.clone();
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let running = running.clone();
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let repeat_lock = repeat_lock.clone();
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let mut stream = TcpStream::accept(1381, 0x10_000, 0x10_000).await.unwrap();
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task::spawn(async move {
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let _rep_lock = repeat_lock.async_lock().await;
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terminate.signal();
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let _lock = running.async_lock().await;
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drop(_rep_lock);
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let routing_table = routing_table.borrow();
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clone_mult!(semaphores, control, up_destinations, aux_mutex, routing_table);
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semaphores.0.async_wait().await;
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semaphores.1.try_wait();
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let _ = task_lock.async_lock().await;
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select_biased! {
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_ = (async {
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// run connection
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let mut stream = stream_opt.borrow_mut()?;
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let _ = handle_connection(&mut stream, control.clone(), &up_destinations, &aux_mutex, &routing_table, timer)
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.await
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.map_err(|e| warn!("connection terminated: {}", e));
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}).fuse() => (),
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_ = terminate.async_wait().fuse() => ()
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}).fuse() => {
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semaphores.2.signal();
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},
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_ = semaphores.1.async_wait().fuse() => (),
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}
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}
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drop(_lock);
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let _ = stream.flush().await;
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let _ = stream.abort().await;
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});
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}
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}).fuse() => (),
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_ = (async {
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loop {
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let cfg = cfg.clone();
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let control = control.clone();
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let up_destinations = up_destinations.clone();
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let aux_mutex = aux_mutex.clone();
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let routing_table = drtio_routing_table.clone();
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let terminate = terminate.clone();
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let running = running.clone();
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let repeat_lock = repeat_lock.clone();
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let restart_idle = restart_idle.clone();
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let _rep_lock = repeat_lock.async_lock().await;
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drop(_rep_lock);
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let _lock = running.async_lock().await;
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let routing_table = routing_table.borrow();
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// handle idle
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task::spawn(async move {
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loop {
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clone_mult!(semaphores, control, up_destinations, aux_mutex, routing_table);
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semaphores.2.async_wait().await;
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semaphores.3.try_wait();
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let _ = task_lock.async_lock().await;
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select_biased! {
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_ = (async {
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if let Some(buffer) = cfg.read("idle_kernel").ok() {
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load_and_run_idle_kernel(&buffer, &control, &up_destinations, &aux_mutex, &routing_table, timer).await;
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}
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}).fuse() => (),
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_ = semaphores.3.async_wait().fuse() => (),
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}
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}
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});
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task::spawn(async move {
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loop {
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select_biased! {
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_ = (async {
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restart_idle.0.async_wait().await;
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restart_idle.1.signal();
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}).fuse() => (),
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let temp_s = Some(TcpStream::accept(1381, 0x10_000, 0x10_000).await.unwrap()); // ALT: implement dummy
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// tcp stream that is empty (another reason the priv construct is annoying)
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if let Some(&stream) = stream_opt {
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let _ = stream.flush().await;
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let _ = stream.abort().await;
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}
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stream_opt.replace(temp_s);
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}).fuse() => {
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if semaphore.1.try_wait().is_none() {
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semaphore.1.signal(); // STOP KERNEL
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}
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if semaphore.3.try_wait().is_none() {
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semaphore.3.signal(); // STOP IDLE
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}
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// if the other stream exists -> flush it and replace with the new stream
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semaphore.0.signal(); // NEW KERNEL
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}
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_ = (async {
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restart_idle.wait_async().await;
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}).fuse() => {
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if semaphore.3.try_wait().is_none() {
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semaphore.3.signal(); // STOP IDLE
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semaphore.2.signal(); // NEW IDLE
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}
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}
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drop(_lock);
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}
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}).fuse() => (),
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}
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});
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@ -996,3 +941,15 @@ pub fn soft_panic_main(timer: GlobalTimer, cfg: Config) -> ! {
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Sockets::run(&mut iface, || Instant::from_millis(timer.get_time().0 as i32));
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}
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macro_rules! clone_mult {
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($id:ident) => {
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let $id = $id.clone();
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};
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// Decompose multiple `eval`s recursively
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($id:ident, $($ids:ident),+) => {
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clone_mult!($id)
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clone_mult!($($ids),+)
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};
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}
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