Much work

src/proto/streams/buffer.rs

@@ -0,0 +1,60 @@
+use frame::{self, Frame};
+
+use slab::Slab;
+
+use std::marker::PhantomData;
+
+/// Buffers frames for multiple streams.
+#[derive(Debug)]
+pub struct Buffer<B> {
+    slab: Slab<Slot<B>>,
+}
+
+/// A sequence of frames in a `Buffer`
+#[derive(Debug)]
+pub struct Deque<B> {
+    indices: Option<Indices>,
+    _p: PhantomData<B>,
+}
+
+/// Tracks the head & tail for a sequence of frames in a `Buffer`.
+#[derive(Debug, Default)]
+struct Indices {
+    head: usize,
+    tail: usize,
+}
+
+#[derive(Debug)]
+struct Slot<B> {
+    frame: Frame<B>,
+    next: usize,
+}
+
+impl<B> Buffer<B> {
+    pub fn new() -> Self {
+        Buffer {
+            slab: Slab::new(),
+        }
+    }
+}
+
+impl<B> Deque<B> {
+    pub fn new() -> Self {
+        Deque {
+            indices: None,
+            _p: PhantomData,
+        }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.indices.is_none()
+    }
+
+    pub fn push_back(&mut self, buf: &mut Buffer<B>, val: Frame<B>) {
+        unimplemented!();
+    }
+
+    pub fn pop_front(&mut self, buf: &mut Buffer<B>) -> Option<Frame<B>> {
+        unimplemented!();
+    }
+}