Add Store::is_borrowed(StoreId)

Add a function to Store to check whether a StoreId is borrowed.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/core/libimagstore/src/store.rs b/lib/core/libimagstore/src/store.rs
index 26612965..5137b517 100644
--- a/lib/core/libimagstore/src/store.rs
+++ b/lib/core/libimagstore/src/store.rs
@@ -216,6 +216,18 @@ impl Store {
         Ok(store)
     }
 
+    pub fn is_borrowed<S: IntoStoreId>(&self, id: S) -> Result<bool> {
+        let id = id.into_storeid()?;
+        debug!("Checking whether id is borrowed: '{}'", id);
+
+        self.entries
+            .read()
+            .map_err(|_| Error::from(EM::LockError))
+            .context(format_err!("Error while checking whether {} is borrowed", id))
+            .map(|cache| cache.get(&id).map(|e| e.is_borrowed()).unwrap_or(false))
+            .map_err(Error::from)
+    }
+
     /// Creates the Entry at the given location (inside the entry)
     ///
     /// # Return value