Crate servo_arc

Fork of Arc for Servo. This has the following advantages over std::sync::Arc:

• We don't waste storage on the weak reference count.
• We don't do extra RMU operations to handle the possibility of weak references.
• We can experiment with arena allocation (todo).
• We can add methods to support our custom use cases 1.
• We have support for dynamically-sized types (see from_header_and_iter).
• We have support for thin arcs to unsized types (see ThinArc).

Structs

Arc	An atomically reference counted shared pointer
ArcBorrow	A "borrowed Arc". This is a pointer to a T that is known to have been allocated within an Arc.
ArcInner	The object allocated by an Arc
ArcUnion	A tagged union that can represent Arc<A> or Arc<B> while only consuming a single word. The type is also NonNull, and thus can be stored in an Option without increasing size.
HeaderSlice	Structure to allow Arc-managing some fixed-sized data and a variably-sized slice in a single allocation.
HeaderWithLength	Header data with an inline length. Consumers that use HeaderWithLength as the Header type in HeaderSlice can take advantage of ThinArc.
RawOffsetArc	An Arc, except it holds a pointer to the T instead of to the entire ArcInner. This struct is FFI-compatible.
ThinArc	A "thin" Arc containing dynamically sized data
UniqueArc	An Arc that is known to be uniquely owned

Enums

ArcUnionBorrow

This represents a borrow of an ArcUnion.

Constants

MAX_REFCOUNT

A soft limit on the amount of references that may be made to an Arc.

Functions

divide_rounding_up
thin_to_thick

Type Definitions

HeaderSliceWithLength