LMDB does not guarantee alignment.

bffhd/db/typed.rs

@@ -144,6 +144,7 @@ impl<A: Adapter> DB<A>
         -> Result<Option<&'txn Archived<A::Value>>, A::Error>
     {
         if let Some(buf) = self.db.get(txn, key).map_err(A::from_db_err)? {
+            tracing::trace!(?buf, ptr=?buf.as_ptr(), "db read");
             Ok(Some(unsafe { archived_root::<A::Value>(buf.as_ref()) }))
         } else {
             Ok(None)
@@ -171,10 +172,19 @@ impl<'a, A> DB<A>
         let pos = serializer.serialize_value(val)
             .map_err(A::from_ser_err)?;
 
+
         let buf = serializer.into_slice();
-        self.db.put(txn, key, &buf, flags)
+        let buf = buf.as_ref();
+        println!("{:?}", buf);
+
+        tracing::trace!(len=buf.len(), pos, "writing value into db");
+
+        let mut stor = self.db.reserve(txn, key, buf.len(), flags)
             .map_err(A::from_db_err)?;
 
+        tracing::trace!(store=?stor.as_ptr(), "store");
+        stor.copy_from_slice(&buf[..]);
+
         Ok(pos)
     }
 }

bffhd/resources/mod.rs

@@ -36,7 +36,11 @@ impl Inner {
             state
         } else {
             tracing::info!(%id, "No previous state, defaulting to `free`");
-            MachineState::free(None)
+            let state = MachineState::used(UserRef::new("test".to_string()), Some(UserRef::new
+                ("prev".to_string())));
+            let update = state.to_state();
+            db.update(id.as_bytes(), &update, &update).unwrap();
+            state
         };
         let signal = Mutable::new(state.to_state());
 

bffhd/resources/state/db.rs

@@ -43,8 +43,8 @@ pub struct StateDB {
 impl StateDB {
     pub fn open_env<P: AsRef<Path>>(path: P) -> lmdb::Result<Arc<Environment>> {
         Environment::new()
-            .set_flags( EnvironmentFlags::WRITE_MAP 
-                      | EnvironmentFlags::NO_SUB_DIR 
+            .set_flags( EnvironmentFlags::WRITE_MAP
+                      | EnvironmentFlags::NO_SUB_DIR
                       | EnvironmentFlags::NO_TLS
                       | EnvironmentFlags::NO_READAHEAD)
             .set_max_dbs(4)