DetArena Struct Reference

Double-ended arena over one region [base, base+size). More...

#include <arena.h>

Public Attributes
uint8_t *	base
	Region start.
size_t	size
	Region length in bytes.
size_t	persist_end
	Persistent pool occupies [0, persist_end).
size_t	scratch_top
	Scratch occupies [scratch_top, size).
size_t	persist_used
	Bytes currently handed out by the persistent pool (payload).
size_t	persist_hw
	High-water of persist_end (for sizing).
size_t	scratch_hw
	High-water of scratch use (size - min scratch_top).

Detailed Description

Double-ended arena over one region [base, base+size).

persist_end and scratch_top are byte offsets from base; the free middle is [persist_end, scratch_top). The persistent pool owns [0, persist_end) (a chain of first-fit blocks); scratch owns [scratch_top, size) (bump). Initialize with det_arena_init(); do not touch the fields directly.

Definition at line 50 of file arena.h.

Member Data Documentation

base

uint8_t* DetArena::base

Region start.

Definition at line 52 of file arena.h.

Referenced by det_arena_init(), det_arena_persist_alloc(), det_arena_persist_free(), det_arena_scratch_alloc_aligned(), and det_arena_set_persist_free().

size

size_t DetArena::size

Region length in bytes.

Definition at line 53 of file arena.h.

Referenced by det_arena_init(), det_arena_scratch_alloc_aligned(), det_arena_scratch_reset(), det_arena_scratch_used(), det_arena_set_add(), and det_arena_set_persist_free().

persist_end

size_t DetArena::persist_end

Persistent pool occupies [0, persist_end).

Definition at line 54 of file arena.h.

Referenced by det_arena_free_bytes(), det_arena_init(), det_arena_persist_alloc(), and det_arena_persist_free().

scratch_top

size_t DetArena::scratch_top

Scratch occupies [scratch_top, size).

Definition at line 55 of file arena.h.

Referenced by det_arena_free_bytes(), det_arena_init(), det_arena_scratch_alloc_aligned(), det_arena_scratch_mark(), det_arena_scratch_release(), det_arena_scratch_reset(), det_arena_scratch_used(), and det_arena_set_scratch_mark().

persist_used

size_t DetArena::persist_used

Bytes currently handed out by the persistent pool (payload).

Definition at line 56 of file arena.h.

Referenced by det_arena_init(), det_arena_persist_alloc(), det_arena_persist_free(), and det_arena_persist_used().

persist_hw

size_t DetArena::persist_hw

High-water of persist_end (for sizing).

Definition at line 57 of file arena.h.

Referenced by det_arena_init(), and det_arena_persist_alloc().

scratch_hw

size_t DetArena::scratch_hw

High-water of scratch use (size - min scratch_top).

Definition at line 58 of file arena.h.

Referenced by det_arena_init(), and det_arena_scratch_alloc_aligned().

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The documentation for this struct was generated from the following file:

• src/network_drivers/session/arena.h