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 pc_arena_init(); do not touch the fields directly.

Definition at line 56 of file arena.h.

Member Data Documentation

◆ base

uint8_t* pc_arena::base

Region start.

Definition at line 58 of file arena.h.

Referenced by pc_arena_init(), pc_arena_owns(), pc_arena_persist_alloc(), pc_arena_persist_free(), pc_arena_scratch_alloc_aligned(), and pc_arena_set_persist_free().

◆ size

size_t pc_arena::size

Region length in bytes.

Definition at line 59 of file arena.h.

Referenced by pc_arena_init(), pc_arena_owns(), pc_arena_scratch_alloc_aligned(), pc_arena_scratch_reset(), pc_arena_scratch_used(), pc_arena_set_add(), pc_arena_set_persist_free(), and pc_secure_reset().

◆ persist_end

size_t pc_arena::persist_end

Persistent pool occupies [0, persist_end).

Definition at line 60 of file arena.h.

Referenced by pc_arena_free_bytes(), pc_arena_init(), pc_arena_persist_alloc(), and pc_arena_persist_free().

◆ scratch_top

size_t pc_arena::scratch_top

Scratch occupies [scratch_top, size).

Definition at line 61 of file arena.h.

Referenced by pc_arena_free_bytes(), pc_arena_init(), pc_arena_scratch_alloc_aligned(), pc_arena_scratch_mark(), pc_arena_scratch_release(), pc_arena_scratch_reset(), pc_arena_scratch_used(), and pc_arena_set_scratch_mark().

◆ persist_used

size_t pc_arena::persist_used

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

Definition at line 62 of file arena.h.

Referenced by pc_arena_init(), pc_arena_persist_alloc(), pc_arena_persist_free(), and pc_arena_persist_used().

◆ persist_hw

size_t pc_arena::persist_hw

High-water of persist_end (for sizing).

Definition at line 63 of file arena.h.

Referenced by pc_arena_init(), and pc_arena_persist_alloc().

◆ scratch_hw

size_t pc_arena::scratch_hw

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

Definition at line 64 of file arena.h.

Referenced by pc_arena_init(), pc_arena_scratch_alloc_aligned(), pc_secure_high_water(), and scratch_high_water().

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

src/server/mmgr/arena.h

Public Attributes