Использование функции для осуществления операций в базе данных вместо ручного блокирования мьютекса.

src/utility/mutex.rs

@@ -0,0 +1,21 @@
+use std::ops::DerefMut;
+use std::sync::Mutex;
+
+pub trait MutexScope<T, ScopeFn, ScopeFnOutput>
+where
+    ScopeFn: FnOnce(&mut T) -> ScopeFnOutput,
+{
+    fn scope(&self, f: ScopeFn) -> ScopeFnOutput;
+}
+
+impl<T, ScopeFn, ScopeFnOutput> MutexScope<T, ScopeFn, ScopeFnOutput> for Mutex<T>
+where
+    ScopeFn: FnOnce(&mut T) -> ScopeFnOutput,
+{
+    fn scope(&self, f: ScopeFn) -> ScopeFnOutput {
+        let mut lock = self.lock().unwrap();
+        let inner = lock.deref_mut();
+        
+        f(inner)
+    }
+}