X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning-background-processor%2Fsrc%2Flib.rs;h=8af4cc6b3e51727c7c8261604342a8485bd6cc24;hb=03537cc346b0ab357cfc80021161c9174d3e270f;hp=afa3633bee69bea6b4fd2a8e2bf330a55147d143;hpb=853007800ebb433f53b5b10e1a941cc65c04e829;p=rust-lightning

diff --git a/lightning-background-processor/src/lib.rs b/lightning-background-processor/src/lib.rs
index afa3633b..8af4cc6b 100644
--- a/lightning-background-processor/src/lib.rs
+++ b/lightning-background-processor/src/lib.rs
@@ -50,6 +50,8 @@ const FRESHNESS_TIMER: u64 = 60;
 #[cfg(test)]
 const FRESHNESS_TIMER: u64 = 1;
 
+const PING_TIMER: u64 = 5;
+
 /// Trait which handles persisting a [`ChannelManager`] to disk.
 ///
 /// [`ChannelManager`]: lightning::ln::channelmanager::ChannelManager
@@ -138,7 +140,8 @@ impl BackgroundProcessor {
 		let stop_thread = Arc::new(AtomicBool::new(false));
 		let stop_thread_clone = stop_thread.clone();
 		let handle = thread::spawn(move || -> Result<(), std::io::Error> {
-			let mut current_time = Instant::now();
+			let mut last_freshness_call = Instant::now();
+			let mut last_ping_call = Instant::now();
 			loop {
 				peer_manager.process_events();
 				channel_manager.process_pending_events(&event_handler);
@@ -153,11 +156,27 @@ impl BackgroundProcessor {
 					log_trace!(logger, "Terminating background processor.");
 					return Ok(());
 				}
-				if current_time.elapsed().as_secs() > FRESHNESS_TIMER {
-					log_trace!(logger, "Calling ChannelManager's and PeerManager's timer_tick_occurred");
+				if last_freshness_call.elapsed().as_secs() > FRESHNESS_TIMER {
+					log_trace!(logger, "Calling ChannelManager's timer_tick_occurred");
 					channel_manager.timer_tick_occurred();
+					last_freshness_call = Instant::now();
+				}
+				if last_ping_call.elapsed().as_secs() > PING_TIMER * 2 {
+					// On various platforms, we may be starved of CPU cycles for several reasons.
+					// E.g. on iOS, if we've been in the background, we will be entirely paused.
+					// Similarly, if we're on a desktop platform and the device has been asleep, we
+					// may not get any cycles.
+					// In any case, if we've been entirely paused for more than double our ping
+					// timer, we should have disconnected all sockets by now (and they're probably
+					// dead anyway), so disconnect them by calling `timer_tick_occurred()` twice.
+					log_trace!(logger, "Awoke after more than double our ping timer, disconnecting peers.");
+					peer_manager.timer_tick_occurred();
+					peer_manager.timer_tick_occurred();
+					last_ping_call = Instant::now();
+				} else if last_ping_call.elapsed().as_secs() > PING_TIMER {
+					log_trace!(logger, "Calling PeerManager's timer_tick_occurred");
 					peer_manager.timer_tick_occurred();
-					current_time = Instant::now();
+					last_ping_call = Instant::now();
 				}
 			}
 		});
@@ -441,8 +460,10 @@ mod tests {
 		let bg_processor = BackgroundProcessor::start(persister, event_handler, nodes[0].chain_monitor.clone(), nodes[0].node.clone(), nodes[0].peer_manager.clone(), nodes[0].logger.clone());
 		loop {
 			let log_entries = nodes[0].logger.lines.lock().unwrap();
-			let desired_log = "Calling ChannelManager's and PeerManager's timer_tick_occurred".to_string();
-			if log_entries.get(&("lightning_background_processor".to_string(), desired_log)).is_some() {
+			let desired_log = "Calling ChannelManager's timer_tick_occurred".to_string();
+			let second_desired_log = "Calling PeerManager's timer_tick_occurred".to_string();
+			if log_entries.get(&("lightning_background_processor".to_string(), desired_log)).is_some() &&
+					log_entries.get(&("lightning_background_processor".to_string(), second_desired_log)).is_some() {
 				break
 			}
 		}