Add helper function to do something with db and easily return the result

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

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/domain/libimagmail/src/notmuch/connection.rs b/lib/domain/libimagmail/src/notmuch/connection.rs
index 22bfd2b4..914835a3 100644
--- a/lib/domain/libimagmail/src/notmuch/connection.rs
+++ b/lib/domain/libimagmail/src/notmuch/connection.rs
@@ -74,4 +74,19 @@ impl NotmuchConnection {
             })
     }
 
+    pub(crate) fn process<F, T>(&self, f: F) -> Result<T>
+        where F: FnOnce(&Database) -> Result<T>
+    {
+        self.db
+            .lock()
+            .map_err(|_| ErrorMsg::LockError)
+            .map_err(Error::from)
+            .and_then(|lock| {
+                lock.begin_atomic()?;
+                let r = f(&lock);
+                lock.end_atomic()?;
+                r
+            })
+    }
+
 }