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SabrinaJewson opened this issue Mar 25, 2025 · 1 comment
Open
1 of 4 tasks

Tracking Issue for arc_is_unique #138938

SabrinaJewson opened this issue Mar 25, 2025 · 1 comment
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C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-libs-api Relevant to the library API team, which will review and decide on the PR/issue.

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@SabrinaJewson
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SabrinaJewson commented Mar 25, 2025 •
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Feature gate: #![feature(arc_is_unique)]

This is a tracking issue for Arc::is_unique, a function that allows determining whether there is exactly one strong count and zero weak counts to an Arc.

Public API

// alloc::sync

impl<T> Arc<T> {
    pub fn is_unique(this: &Self) -> bool;
}

Steps / History

Unresolved Questions

  • None yet.

Footnotes

  1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩
@SabrinaJewson SabrinaJewson added C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. labels Mar 25, 2025
@SabrinaJewson SabrinaJewson mentioned this issue Mar 25, 2025
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@tgross35
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IMO we should also have this method on Rc. It isn't needed for the same synchronization reasons, but it would be nice for consistency and convenience.

ChrisDenton added a commit to ChrisDenton/rust that referenced this issue Apr 28, 2025
@ChrisDenton
Rollup merge of rust-lang#138939 - SabrinaJewson:arc-is-unique, r=tgr…
84e92b1 
…oss35

Add `Arc::is_unique`

Adds

```rs
impl<T> Arc<T> {
    pub fn is_unique(this: &Self) -> bool;
}
```

Tracking issue: rust-lang#138938
ACP: rust-lang/libs-team#560
ChrisDenton added a commit to ChrisDenton/rust that referenced this issue Apr 28, 2025
@ChrisDenton
Rollup merge of rust-lang#138939 - SabrinaJewson:arc-is-unique, r=tgr…
d603142 
…oss35

Add `Arc::is_unique`

Adds

```rs
impl<T> Arc<T> {
    pub fn is_unique(this: &Self) -> bool;
}
```

Tracking issue: rust-lang#138938
ACP: rust-lang/libs-team#560
ChrisDenton added a commit to ChrisDenton/rust that referenced this issue Apr 28, 2025
@ChrisDenton
Rollup merge of rust-lang#138939 - SabrinaJewson:arc-is-unique, r=tgr…
55f9326 
…oss35

Add `Arc::is_unique`

Adds

```rs
impl<T> Arc<T> {
    pub fn is_unique(this: &Self) -> bool;
}
```

Tracking issue: rust-lang#138938
ACP: rust-lang/libs-team#560
rust-timer added a commit to rust-lang-ci/rust that referenced this issue Apr 28, 2025
@rust-timer
Unrolled build for rust-lang#138939
abb427d 
Rollup merge of rust-lang#138939 - SabrinaJewson:arc-is-unique, r=tgross35

Add `Arc::is_unique`

Adds

```rs
impl<T> Arc<T> {
    pub fn is_unique(this: &Self) -> bool;
}
```

Tracking issue: rust-lang#138938
ACP: rust-lang/libs-team#560
github-actions bot pushed a commit to model-checking/verify-rust-std that referenced this issue May 9, 2025
@ChrisDenton
Rollup merge of rust-lang#138939 - SabrinaJewson:arc-is-unique, r=tgr…
eab92b2 
…oss35

Add `Arc::is_unique`

Adds

```rs
impl<T> Arc<T> {
    pub fn is_unique(this: &Self) -> bool;
}
```

Tracking issue: rust-lang#138938
ACP: rust-lang/libs-team#560
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