1 files changed, 18 insertions, 0 deletions
diff --git a/base/src/descriptor.rs b/base/src/descriptor.rs
index 2723d8e3e..0b840eae9 100644
--- a/base/src/descriptor.rs
+++ b/base/src/descriptor.rs
@@ -1,3 +1,7 @@
+// Copyright 2022 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
 use crate::{PollToken, RawDescriptor};
 use serde::{Deserialize, Serialize};
 use std::{
@@ -24,6 +28,11 @@ pub trait AsRawDescriptor {
     fn as_raw_descriptor(&self) -> RawDescriptor;
 }
 
+/// A trait similar to `AsRawDescriptor` but supports an arbitrary number of descriptors.
+pub trait AsRawDescriptors {
+    fn as_raw_descriptors(&self) -> Vec<RawDescriptor>;
+}
+
 pub trait FromRawDescriptor {
     /// # Safety
     /// Safe only if the caller ensures nothing has access to the descriptor after passing it to
@@ -37,6 +46,15 @@ impl AsRawDescriptor for SafeDescriptor {
     }
 }
 
+impl<T> AsRawDescriptors for T
+where
+    T: AsRawDescriptor,
+{
+    fn as_raw_descriptors(&self) -> Vec<RawDescriptor> {
+        vec![self.as_raw_descriptor()]
+    }
+}
+
 impl IntoRawDescriptor for SafeDescriptor {
     fn into_raw_descriptor(self) -> RawDescriptor {
         let descriptor = self.descriptor;