use util::config::{UserConfig, ChannelConfig};
use util::events::{EventHandler, EventsProvider, MessageSendEvent, MessageSendEventsProvider, ClosureReason, HTLCDestination};
use util::{byte_utils, events};
+use util::crypto::sign;
+use util::wakers::PersistenceNotifier;
use util::scid_utils::fake_scid;
use util::ser::{BigSize, FixedLengthReader, Readable, ReadableArgs, MaybeReadable, Writeable, Writer, VecWriter};
use util::logger::{Level, Logger};
use core::{cmp, mem};
use core::cell::RefCell;
use io::Read;
-use sync::{Arc, Condvar, Mutex, MutexGuard, RwLock, RwLockReadGuard};
+use sync::{Arc, Mutex, MutexGuard, RwLock, RwLockReadGuard};
use core::sync::atomic::{AtomicUsize, Ordering};
use core::time::Duration;
use core::ops::Deref;
-#[cfg(any(test, feature = "std"))]
-use std::time::Instant;
-use util::crypto::sign;
-
// We hold various information about HTLC relay in the HTLC objects in Channel itself:
//
// Upon receipt of an HTLC from a peer, we'll give it a PendingHTLCStatus indicating if it should
#[cfg(any(test, feature = "_test_utils"))]
pub fn get_persistence_condvar_value(&self) -> bool {
- let mutcond = &self.persistence_notifier.persistence_lock;
- let &(ref mtx, _) = mutcond;
- let guard = mtx.lock().unwrap();
- *guard
+ self.persistence_notifier.needs_persist()
}
/// Gets the latest best block which was connected either via the [`chain::Listen`] or
}
}
-/// Used to signal to the ChannelManager persister that the manager needs to be re-persisted to
-/// disk/backups, through `await_persistable_update_timeout` and `await_persistable_update`.
-struct PersistenceNotifier {
- /// Users won't access the persistence_lock directly, but rather wait on its bool using
- /// `wait_timeout` and `wait`.
- persistence_lock: (Mutex<bool>, Condvar),
-}
-
-impl PersistenceNotifier {
- fn new() -> Self {
- Self {
- persistence_lock: (Mutex::new(false), Condvar::new()),
- }
- }
-
- fn wait(&self) {
- loop {
- let &(ref mtx, ref cvar) = &self.persistence_lock;
- let mut guard = mtx.lock().unwrap();
- if *guard {
- *guard = false;
- return;
- }
- guard = cvar.wait(guard).unwrap();
- let result = *guard;
- if result {
- *guard = false;
- return
- }
- }
- }
-
- #[cfg(any(test, feature = "std"))]
- fn wait_timeout(&self, max_wait: Duration) -> bool {
- let current_time = Instant::now();
- loop {
- let &(ref mtx, ref cvar) = &self.persistence_lock;
- let mut guard = mtx.lock().unwrap();
- if *guard {
- *guard = false;
- return true;
- }
- guard = cvar.wait_timeout(guard, max_wait).unwrap().0;
- // Due to spurious wakeups that can happen on `wait_timeout`, here we need to check if the
- // desired wait time has actually passed, and if not then restart the loop with a reduced wait
- // time. Note that this logic can be highly simplified through the use of
- // `Condvar::wait_while` and `Condvar::wait_timeout_while`, if and when our MSRV is raised to
- // 1.42.0.
- let elapsed = current_time.elapsed();
- let result = *guard;
- if result || elapsed >= max_wait {
- *guard = false;
- return result;
- }
- match max_wait.checked_sub(elapsed) {
- None => return result,
- Some(_) => continue
- }
- }
- }
-
- // Signal to the ChannelManager persister that there are updates necessitating persisting to disk.
- fn notify(&self) {
- let &(ref persist_mtx, ref cnd) = &self.persistence_lock;
- let mut persistence_lock = persist_mtx.lock().unwrap();
- *persistence_lock = true;
- mem::drop(persistence_lock);
- cnd.notify_all();
- }
-}
-
const SERIALIZATION_VERSION: u8 = 1;
const MIN_SERIALIZATION_VERSION: u8 = 1;
use util::test_utils;
use chain::keysinterface::KeysInterface;
- #[cfg(feature = "std")]
- #[test]
- fn test_wait_timeout() {
- use ln::channelmanager::PersistenceNotifier;
- use sync::Arc;
- use core::sync::atomic::AtomicBool;
- use std::thread;
-
- let persistence_notifier = Arc::new(PersistenceNotifier::new());
- let thread_notifier = Arc::clone(&persistence_notifier);
-
- let exit_thread = Arc::new(AtomicBool::new(false));
- let exit_thread_clone = exit_thread.clone();
- thread::spawn(move || {
- loop {
- let &(ref persist_mtx, ref cnd) = &thread_notifier.persistence_lock;
- let mut persistence_lock = persist_mtx.lock().unwrap();
- *persistence_lock = true;
- cnd.notify_all();
-
- if exit_thread_clone.load(Ordering::SeqCst) {
- break
- }
- }
- });
-
- // Check that we can block indefinitely until updates are available.
- let _ = persistence_notifier.wait();
-
- // Check that the PersistenceNotifier will return after the given duration if updates are
- // available.
- loop {
- if persistence_notifier.wait_timeout(Duration::from_millis(100)) {
- break
- }
- }
-
- exit_thread.store(true, Ordering::SeqCst);
-
- // Check that the PersistenceNotifier will return after the given duration even if no updates
- // are available.
- loop {
- if !persistence_notifier.wait_timeout(Duration::from_millis(100)) {
- break
- }
- }
- }
-
#[test]
fn test_notify_limits() {
// Check that a few cases which don't require the persistence of a new ChannelManager,
projects / rust-lightning / blobdiff