Module alloc::sync

Thread-safe reference-counting pointers.

See the Arc<T> documentation for more details.

Note: This module is only available on platforms that support atomic loads and stores of pointers. This may be detected at compile time using #[cfg(target_has_atomic = "ptr")].

Macros

• acquire 🔒

Structs

• Arc
  A thread-safe reference-counting pointer. ‘Arc’ stands for ‘Atomically Reference Counted’.
• ArcInner 🔒
• Weak
  Weak is a version of Arc that holds a non-owning reference to the managed allocation. The allocation is accessed by calling upgrade on the Weak pointer, which returns an Option<Arc<T>>.
• WeakInner 🔒
  Helper type to allow accessing the reference counts without making any assertions about the data field.

Constants

• INTERNAL_OVERFLOW_ERROR 🔒
  The error in case either counter reaches above MAX_REFCOUNT, and we can panic safely.
• MAX_REFCOUNT 🔒
  A soft limit on the amount of references that may be made to an Arc.

Traits

• ArcEqIdent 🔒
• ArcFromSlice 🔒
  Specialization trait used for From<&[T]>.
• ToArcSlice 🔒
  Specialization trait used for collecting into Arc<[T]>.

Functions

• arcinner_layout_for_value_layout 🔒
  Calculate layout for ArcInner<T> using the inner value’s layout
• data_offset 🔒 ^⚠
  Get the offset within an ArcInner for the payload behind a pointer.
• data_offset_align 🔒