add custom framed dispatcher service

actix-ioframe/src/cell.rs

@@ -0,0 +1,39 @@
+//! Custom cell impl
+
+use std::cell::UnsafeCell;
+use std::fmt;
+use std::rc::Rc;
+
+pub(crate) struct Cell<T> {
+    inner: Rc<UnsafeCell<T>>,
+}
+
+impl<T> Clone for Cell<T> {
+    fn clone(&self) -> Self {
+        Self {
+            inner: self.inner.clone(),
+        }
+    }
+}
+
+impl<T: fmt::Debug> fmt::Debug for Cell<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        self.inner.fmt(f)
+    }
+}
+
+impl<T> Cell<T> {
+    pub fn new(inner: T) -> Self {
+        Self {
+            inner: Rc::new(UnsafeCell::new(inner)),
+        }
+    }
+
+    pub fn get_ref(&self) -> &T {
+        unsafe { &*self.inner.as_ref().get() }
+    }
+
+    pub fn get_mut(&mut self) -> &mut T {
+        unsafe { &mut *self.inner.as_ref().get() }
+    }
+}