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Tracking Issue for Atomic*::from_ptr and const_atomic_from_ptr #108652

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Tracking Issue for Atomic*::from_ptr and const_atomic_from_ptr#108652
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A-atomicArea: Atomics, barriers, and sync primitivesC-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCT-libs-api[DEPRECATED; DO NOT USE]

Description

@WaffleLapkin
WaffleLapkin
opened on Mar 2, 2023

Feature gate: #![feature(atomic_from_ptr)], #![feature(const_atomic_from_ptr)]

This is a tracking issue for Atomic*::from_ptr set of functions.

Public API

// core::atomic

impl AtomicBool { pub const unsafe fn from_ptr<'a>(ptr: *mut bool) -> &'a AtomicBool; }

impl<T> AtomicPtr<T> { pub const unsafe fn from_ptr<'a>(ptr: *mut *mut T) -> &'a AtomicPtr<T>; }

impl AtomicU8    { pub const unsafe fn from_ptr<'a>(ptr: *mut u8)    -> &'a AtomicU8;    }
impl AtomicU16   { pub const unsafe fn from_ptr<'a>(ptr: *mut u16)   -> &'a AtomicU16;   }
impl AtomicU32   { pub const unsafe fn from_ptr<'a>(ptr: *mut u32)   -> &'a AtomicU32;   }
impl AtomicU64   { pub const unsafe fn from_ptr<'a>(ptr: *mut u64)   -> &'a AtomicU64;   }
impl AtomicUsize { pub const unsafe fn from_ptr<'a>(ptr: *mut usize) -> &'a AtomicUsize; }

impl AtomicI8    { pub const unsafe fn from_ptr<'a>(ptr: *mut i8)    -> &'a AtomicI8;    }
impl AtomicI16   { pub const unsafe fn from_ptr<'a>(ptr: *mut i16)   -> &'a AtomicI16;   }
impl AtomicI32   { pub const unsafe fn from_ptr<'a>(ptr: *mut i32)   -> &'a AtomicI32;   }
impl AtomicI64   { pub const unsafe fn from_ptr<'a>(ptr: *mut i64)   -> &'a AtomicI64;   }
impl AtomicIsize { pub const unsafe fn from_ptr<'a>(ptr: *mut isize) -> &'a AtomicIsize; }

Steps / History

Unresolved Questions

  • None yet.

Footnotes

  1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩

Activity

  1. WaffleLapkin
    added
    C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFC
    T-libsRelevant to the library team, which will review and decide on the PR/issue.
    A-atomicArea: Atomics, barriers, and sync primitives
    on Mar 2, 2023

  2. tgross35 commented on Sep 9, 2023

    @tgross35
    tgross35
    on Sep 9, 2023
    Member

    I think there is a duplication in the docs, I think the bool line shouldn't be there?

    image

    Other than that, do you have any opposition to me opening a stabilization PR @WaffleLapkin? This hasn't been around super long but it seems uncontroversial, and mirrors as_ptr.

  3. WaffleLapkin commented on Sep 9, 2023

    @WaffleLapkin
    WaffleLapkin
    on Sep 9, 2023
    MemberAuthor

    @tgross35 I have no opposition, however do note that the decision here is on the libs-api team =)

    you may want to reach out to them in the zulip for example

  4. tgross35 commented on Sep 9, 2023

    @tgross35
    tgross35
    on Sep 9, 2023
    Member

    @tgross35 I have no opposition, however do note that the decision here is on the libs-api team =)

    Rightieo, this change is small enough that I opened #115719 to get the ball rolling

  5. bors
    added a commit that references this issue on Oct 14, 2023

    Auto merge of rust-lang#115719 - tgross35:atomic-from-ptr, r=dtolnay

    2a7c2df

  6. Dylan-DPC commented on Mar 7, 2024

    @Dylan-DPC
    Dylan-DPC
    on Mar 7, 2024
    Member

    Stabilised in #115719

  7. Dylan-DPC
    closed this as completedon Mar 7, 2024
  8. tgross35
    changed the title [-]Tracking Issue for `Atomic*::from_ptr`[/-] [+]Tracking Issue for `Atomic*::from_ptr` and `const_atomic_from_ptr`[/+] on Oct 14, 2024

  9. tgross35 commented on Oct 14, 2024

    @tgross35
    tgross35
    on Oct 14, 2024
    Member

    Reopening this since the const gate still points here

  10. tgross35
    reopened this on Oct 14, 2024
  11. tgross35
    added 3 commits that reference this issue on Oct 14, 2024

    Stabilize `const_atomic_from_ptr`

    1413c8c

    Stabilize `const_atomic_from_ptr`

    58020f4

    Stabilize `const_atomic_from_ptr`

    c5be437
  12. tgross35
    added a commit that references this issue on Oct 29, 2024

    Stabilize `const_atomic_from_ptr`

    b368110
  13. joboet
    added
    T-libs-api[DEPRECATED; DO NOT USE]
    and removed
    T-libsRelevant to the library team, which will review and decide on the PR/issue.
    on Sep 17, 2025

  14. joboet commented on Sep 17, 2025

    @joboet
    joboet
    on Sep 17, 2025
    Member

    This was stabilised in 1.84.

  15. joboet
    closed this as completedon Sep 17, 2025
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    A-atomicArea: Atomics, barriers, and sync primitivesC-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCT-libs-api[DEPRECATED; DO NOT USE]

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