mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Weaken needlessly restrictive orderings on Arc::*_count

Browse Source 
Signed-off-by: Alex Saveau <saveau.alexandre@gmail.com>
This commit is contained in:
Alex Saveau 2023-09-04 21:43:21 +01:00
parent ec08a0337f
commit 4c2f1c615b
No known key found for this signature in database
GPG Key ID: 3F8D5B16EB169D48
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
library/alloc/src/sync.rs
View File

@ -1616,7 +1616,7 @@ impl<T: ?Sized, A: Allocator> Arc<T, A> {
#[must_use]
#[stable(feature = "arc_counts", since = "1.15.0")]
pub fn weak_count(this: &Self) -> usize {
let cnt = this.inner().weak.load(Acquire);
let cnt = this.inner().weak.load(Relaxed);
// If the weak count is currently locked, the value of the
// count was 0 just before taking the lock.
if cnt == usize::MAX { 0 } else { cnt - 1 }
@ -1646,7 +1646,7 @@ impl<T: ?Sized, A: Allocator> Arc<T, A> {
#[must_use]
#[stable(feature = "arc_counts", since = "1.15.0")]
pub fn strong_count(this: &Self) -> usize {
this.inner().strong.load(Acquire)
this.inner().strong.load(Relaxed)
}
/// Increments the strong reference count on the `Arc<T>` associated with the
@ -2801,7 +2801,7 @@ impl<T: ?Sized, A: Allocator> Weak<T, A> {
#[must_use]
#[stable(feature = "weak_counts", since = "1.41.0")]
pub fn strong_count(&self) -> usize {
if let Some(inner) = self.inner() { inner.strong.load(Acquire) } else { 0 }
if let Some(inner) = self.inner() { inner.strong.load(Relaxed) } else { 0 }
}
/// Gets an approximation of the number of `Weak` pointers pointing to this
@ -2820,7 +2820,7 @@ impl<T: ?Sized, A: Allocator> Weak<T, A> {
pub fn weak_count(&self) -> usize {
if let Some(inner) = self.inner() {
let weak = inner.weak.load(Acquire);
let strong = inner.strong.load(Acquire);
let strong = inner.strong.load(Relaxed);
if strong == 0 {
0
} else {