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firefox issue: https://bugzilla.mozilla.org/show_bug.cgi?id=1757571 fix from: crossbeam-rs/crossbeam#802
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,72 @@ | ||
From 81fda54d4ada159c0427e6fc691b2926ae78bd3c Mon Sep 17 00:00:00 2001 | ||
From: Taiki Endo <te316e89@gmail.com> | ||
Date: Fri, 18 Mar 2022 00:06:27 +0900 | ||
Subject: [PATCH] channel: Do not call current_thread_id inside iteration | ||
|
||
--- | ||
crossbeam-channel/src/waker.rs | 46 +++++++++++++++++++--------------- | ||
1 file changed, 26 insertions(+), 20 deletions(-) | ||
|
||
diff --git a/crossbeam-channel/src/waker.rs b/crossbeam-channel/src/waker.rs | ||
index dec73a96f..ee445ec8c 100644 | ||
--- firefox-98.0/third_party/rust/crossbeam-channel/src/waker.rs.orig | ||
+++ firefox-98.0/third_party/rust/crossbeam-channel/src/waker.rs | ||
@@ -77,26 +77,32 @@ impl Waker { | ||
/// Attempts to find another thread's entry, select the operation, and wake it up. | ||
#[inline] | ||
pub(crate) fn try_select(&mut self) -> Option<Entry> { | ||
- self.selectors | ||
- .iter() | ||
- .position(|selector| { | ||
- // Does the entry belong to a different thread? | ||
- selector.cx.thread_id() != current_thread_id() | ||
- && selector // Try selecting this operation. | ||
- .cx | ||
- .try_select(Selected::Operation(selector.oper)) | ||
- .is_ok() | ||
- && { | ||
- // Provide the packet. | ||
- selector.cx.store_packet(selector.packet); | ||
- // Wake the thread up. | ||
- selector.cx.unpark(); | ||
- true | ||
- } | ||
- }) | ||
- // Remove the entry from the queue to keep it clean and improve | ||
- // performance. | ||
- .map(|pos| self.selectors.remove(pos)) | ||
+ if self.selectors.is_empty() { | ||
+ None | ||
+ } else { | ||
+ let thread_id = current_thread_id(); | ||
+ | ||
+ self.selectors | ||
+ .iter() | ||
+ .position(|selector| { | ||
+ // Does the entry belong to a different thread? | ||
+ selector.cx.thread_id() != thread_id | ||
+ && selector // Try selecting this operation. | ||
+ .cx | ||
+ .try_select(Selected::Operation(selector.oper)) | ||
+ .is_ok() | ||
+ && { | ||
+ // Provide the packet. | ||
+ selector.cx.store_packet(selector.packet); | ||
+ // Wake the thread up. | ||
+ selector.cx.unpark(); | ||
+ true | ||
+ } | ||
+ }) | ||
+ // Remove the entry from the queue to keep it clean and improve | ||
+ // performance. | ||
+ .map(|pos| self.selectors.remove(pos)) | ||
+ } | ||
} | ||
|
||
/// Returns `true` if there is an entry which can be selected by the current thread. | ||
--- firefox-98.0/third_party/rust/crossbeam-channel/.cargo-checksum.json.orig 2022-03-05 00:04:39.000000000 +0100 | ||
+++ firefox-98.0/third_party/rust/crossbeam-channel/.cargo-checksum.json 2022-03-19 10:56:44.195123311 +0100 | ||
@@ -1 +1 @@ | ||
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\ No newline at end of file | ||
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