Crate rustc_arena

The arena, a fast but limited type of allocator.

Arenas are a type of allocator that destroy the objects within, all at once, once the arena itself is destroyed. They do not support deallocation of individual objects while the arena itself is still alive. The benefit of an arena is very fast allocation; just a pointer bump.

This crate implements several kinds of arena.

Macros

• declare_arena
  Declare an Arena containing one dropless arena and many typed arenas (the types of the typed arenas are specified by the arguments).

Structs

• ArenaChunk 🔒
• DroplessArena
  An arena that can hold objects of multiple different types that impl Copy and/or satisfy !mem::needs_drop.
• IsCopy
• IsNotCopy
• TypedArena
  An arena that can hold objects of only one type.

Constants

• DROPLESS_ALIGNMENT 🔒
• HUGE_PAGE 🔒
• PAGE 🔒

Functions

• align_down 🔒
• align_up 🔒
• outline 🔒
  This calls the passed function while ensuring it won’t be inlined into the caller.