From 822d5ad79b86b638343b1c4840595d38aa4190b3 Mon Sep 17 00:00:00 2001
From: Christian Eck <C.Eck@beckhoff.com>
Date: Wed, 19 Aug 2026 11:00:14 +0200
Subject: [PATCH] add split traits

---
 embedded-io-async/src/lib.rs | 12 ++++++++++++
 embedded-io/src/lib.rs       | 12 ++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/embedded-io-async/src/lib.rs b/embedded-io-async/src/lib.rs
index b90935f2..6fb97437 100644
--- a/embedded-io-async/src/lib.rs
+++ b/embedded-io-async/src/lib.rs
@@ -167,3 +167,15 @@ pub trait Seek: ErrorType {
         self.seek(SeekFrom::Current(0)).await
     }
 }
+
+/// Split a stream in a reader and writer, which are independent
+pub trait SplitRW {
+    /// Reader type of the split stream
+    type Reader: Read;
+
+    /// Writer type of the split stream
+    type Writer: Write;
+
+    /// Split a stream in a independent reader and writer
+    fn split_rw(&mut self) -> (Self::Reader, Self::Writer);
+}
diff --git a/embedded-io/src/lib.rs b/embedded-io/src/lib.rs
index daca2441..0dbfe3cd 100644
--- a/embedded-io/src/lib.rs
+++ b/embedded-io/src/lib.rs
@@ -566,3 +566,15 @@ pub trait WriteReady: ErrorType {
     /// If this returns `true`, it's guaranteed that the next call to [`Write::write`] will not block.
     fn write_ready(&mut self) -> Result<bool, Self::Error>;
 }
+
+/// Split a stream in a reader and writer, which are independent
+pub trait SplitRW {
+    /// Reader type of the split stream
+    type Reader: Read;
+
+    /// Writer type of the split stream
+    type Writer: Write;
+
+    /// Split a stream in a independent reader and writer
+    fn split_rw(&mut self) -> (Self::Reader, Self::Writer);
+}