release lock when no longer needed

src/mail/incoming.rs

@@ -8,7 +8,7 @@ use futures::{future::BoxFuture, Future, FutureExt};
 use k2v_client::{CausalValue, CausalityToken, K2vClient, K2vValue};
 use rusoto_s3::{PutObjectRequest, S3Client, S3};
 use tokio::sync::watch;
-use tracing::{error, info};
+use tracing::{error, info, warn};
 
 use crate::cryptoblob;
 use crate::login::{Credentials, PublicCredentials};
@@ -285,7 +285,23 @@ async fn k2v_lock_loop_internal(
     .boxed();
 
     let res = futures::try_join!(watch_lock_loop, lock_notify_loop, take_lock_loop);
-    info!("lock loop exited: {:?}", res);
+
+    info!("lock loop exited: {:?}, releasing", res);
+
+    if !held_tx.is_closed() {
+        warn!("wierd...");
+        let _ = held_tx.send(false);
+    }
+
+    // If lock is ours, release it
+    let release = match &*state_rx.borrow() {
+        LockState::Held(pid, _, ct) if *pid == our_pid => Some(ct.clone()),
+        _ => None,
+    };
+    if let Some(ct) = release {
+        let _ = k2v.delete_item(pk, sk, ct.clone()).await;
+    }
+
 }
 
 // ---- UTIL: function to wait for a value to have changed in K2V ----