1 // Copyright 2023 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //      http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 use std::sync::Arc;
16 use std::task::{Wake, Waker};
17 
18 pub use pin_utils::pin_mut as pin;
19 
20 // Create a `Waker` that
21 // does nothing when `wake`
22 // is called
noop_waker() -> Waker23 pub fn noop_waker() -> Waker {
24     struct NoopWaker;
25 
26     impl Wake for NoopWaker {
27         fn wake(self: Arc<Self>) {}
28     }
29 
30     Arc::new(NoopWaker).into()
31 }
32