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sync: add same_channel method to mpsc Senders (#3532)

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Zhang Jingqiang 2021-03-05 00:45:40 +08:00 committed by GitHub
parent 0867a6fc03
commit e06b257e09
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3 changed files with 37 additions and 0 deletions
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16
tokio/src/sync/mpsc/bounded.rs
View File

@ -698,6 +698,22 @@ impl<T> Sender<T> {
Ok(Permit { chan: &self.chan })
}
/// Returns `true` if senders belong to the same channel.
///
/// # Examples
///
/// ```
/// let (tx, rx) = tokio::sync::mpsc::channel::<()>(1);
/// let tx2 = tx.clone();
/// assert!(tx.same_channel(&tx2));
///
/// let (tx3, rx3) = tokio::sync::mpsc::channel::<()>(1);
/// assert!(!tx3.same_channel(&tx2));
/// ```
pub fn same_channel(&self, other: &Self) -> bool {
self.chan.same_channel(&other.chan)
}
}
impl<T> Clone for Sender<T> {

5
tokio/src/sync/mpsc/chan.rs
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@ -139,6 +139,11 @@ impl<T, S> Tx<T, S> {
pub(crate) fn wake_rx(&self) {
self.inner.rx_waker.wake();
}
/// Returns `true` if senders belong to the same channel.
pub(crate) fn same_channel(&self, other: &Self) -> bool {
Arc::ptr_eq(&self.inner, &other.inner)
}
}
impl<T, S: Semaphore> Tx<T, S> {

16
tokio/src/sync/mpsc/unbounded.rs
View File

@ -291,4 +291,20 @@ impl<T> UnboundedSender<T> {
pub fn is_closed(&self) -> bool {
self.chan.is_closed()
}
/// Returns `true` if senders belong to the same channel.
///
/// # Examples
///
/// ```
/// let (tx, rx) = tokio::sync::mpsc::unbounded_channel::<()>();
/// let tx2 = tx.clone();
/// assert!(tx.same_channel(&tx2));
///
/// let (tx3, rx3) = tokio::sync::mpsc::unbounded_channel::<()>();
/// assert!(!tx3.same_channel(&tx2));
/// ```
pub fn same_channel(&self, other: &Self) -> bool {
self.chan.same_channel(&other.chan)
}
}