refactor

veilid-tools/src/mutable_future.rs

@@ -0,0 +1,33 @@
+use super::*;
+
+pub struct MutableFuture<O, T: Future<Output = O>> {
+    inner: Arc<Mutex<Pin<Box<T>>>>,
+}
+
+impl<O, T: Future<Output = O>> MutableFuture<O, T> {
+    pub fn new(inner: T) -> Self {
+        Self {
+            inner: Arc::new(Mutex::new(Box::pin(inner))),
+        }
+    }
+
+    pub fn set(&self, inner: T) {
+        *self.inner.lock() = Box::pin(inner);
+    }
+}
+
+impl<O, T: Future<Output = O>> Clone for MutableFuture<O, T> {
+    fn clone(&self) -> Self {
+        Self {
+            inner: self.inner.clone(),
+        }
+    }
+}
+
+impl<O, T: Future<Output = O>> Future for MutableFuture<O, T> {
+    type Output = O;
+    fn poll(self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> task::Poll<Self::Output> {
+        let mut inner = self.inner.lock();
+        T::poll(inner.as_mut(), cx)
+    }
+}