From 8f898a1f5461a7626e0854914125eeb9f97516b4 Mon Sep 17 00:00:00 2001
From: zephyr <i@zephyr.moe>
Date: Sun, 10 Apr 2022 23:12:18 +0900
Subject: [PATCH] add ref wrapper

---
 kaminari/Cargo.toml   |  2 +-
 kaminari/src/lib.rs   |  1 +
 kaminari/src/trick.rs | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 kaminari/src/trick.rs

diff --git a/kaminari/Cargo.toml b/kaminari/Cargo.toml
index 0643966..3487b62 100644
--- a/kaminari/Cargo.toml
+++ b/kaminari/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "kaminari"
-version = "0.4.0"
+version = "0.4.1"
 edition = "2021"
 authors = ["zephyr <i@zephyr.moe>"]
 keywords = ["lightws", "network"]
diff --git a/kaminari/src/lib.rs b/kaminari/src/lib.rs
index cd34a5e..f402ab6 100644
--- a/kaminari/src/lib.rs
+++ b/kaminari/src/lib.rs
@@ -30,3 +30,4 @@ pub mod nop;
 pub mod tls;
 pub mod mix;
 pub mod opt;
+pub mod trick;
diff --git a/kaminari/src/trick.rs b/kaminari/src/trick.rs
new file mode 100644
index 0000000..1adf45a
--- /dev/null
+++ b/kaminari/src/trick.rs
@@ -0,0 +1,35 @@
+use core::ops::Deref;
+
+// Safety:
+// pointer is not null once inited(comes from an immutable ref)
+// pointee memory is always valid during the eventloop
+pub struct Ref<T>(*const T);
+
+unsafe impl<T: Send + Sync> Send for Ref<T> {}
+unsafe impl<T: Send + Sync> Sync for Ref<T> {}
+
+impl<T> Copy for Ref<T> {}
+
+impl<T> Clone for Ref<T> {
+    fn clone(&self) -> Self { *self }
+}
+
+impl<T> Deref for Ref<T> {
+    type Target = T;
+
+    #[inline]
+    fn deref(&self) -> &Self::Target { unsafe { &*self.0 } }
+}
+
+impl<T> AsRef<T> for Ref<T> {
+    #[inline]
+    fn as_ref(&self) -> &T { unsafe { &*self.0 } }
+}
+
+impl<T> From<&T> for Ref<T> {
+    fn from(x: &T) -> Self { Ref(x as *const _) }
+}
+
+impl<T> Ref<T> {
+    pub const fn new(x: &T) -> Self { Self(x as *const _) }
+}