mirror of
https://github.com/Ed94/raddebugger.git
synced 2026-07-20 23:46:48 +00:00
Ryan Fleury
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
// Copyright (c) 2024 Epic Games Tools
|
|
// Licensed under the MIT license (https://opensource.org/license/mit/)
|
|
|
|
#ifndef BASE_ARENA_H
|
|
#define BASE_ARENA_H
|
|
|
|
////////////////////////////////
|
|
//~ rjf: Constants
|
|
|
|
#define ARENA_HEADER_SIZE 128
|
|
|
|
////////////////////////////////
|
|
//~ rjf: Types
|
|
|
|
typedef U64 ArenaFlags;
|
|
enum
|
|
{
|
|
ArenaFlag_NoChain = (1<<0),
|
|
ArenaFlag_LargePages = (1<<1),
|
|
};
|
|
|
|
typedef struct ArenaParams ArenaParams;
|
|
struct ArenaParams
|
|
{
|
|
ArenaFlags flags;
|
|
U64 reserve_size;
|
|
U64 commit_size;
|
|
void *optional_backing_buffer;
|
|
};
|
|
|
|
typedef struct Arena Arena;
|
|
struct Arena
|
|
{
|
|
Arena *prev; // previous arena in chain
|
|
Arena *current; // current arena in chain
|
|
ArenaFlags flags;
|
|
U64 cmt_size;
|
|
U64 res_size;
|
|
U64 base_pos;
|
|
U64 pos;
|
|
U64 cmt;
|
|
U64 res;
|
|
#if ARENA_FREE_LIST
|
|
U64 free_size;
|
|
Arena *free_last;
|
|
#endif
|
|
};
|
|
StaticAssert(sizeof(Arena) <= ARENA_HEADER_SIZE, arena_header_size_check);
|
|
|
|
typedef struct Temp Temp;
|
|
struct Temp
|
|
{
|
|
Arena *arena;
|
|
U64 pos;
|
|
};
|
|
|
|
////////////////////////////////
|
|
//~ rjf: Global Defaults
|
|
|
|
global U64 arena_default_reserve_size = MB(64);
|
|
global U64 arena_default_commit_size = KB(64);
|
|
global ArenaFlags arena_default_flags = 0;
|
|
|
|
////////////////////////////////
|
|
//~ rjf: Arena Functions
|
|
|
|
//- rjf: arena creation/destruction
|
|
internal Arena *arena_alloc_(ArenaParams *params);
|
|
#define arena_alloc(...) arena_alloc_(&(ArenaParams){.reserve_size = arena_default_reserve_size, .commit_size = arena_default_commit_size, .flags = arena_default_flags, __VA_ARGS__})
|
|
internal void arena_release(Arena *arena);
|
|
|
|
//- rjf: arena push/pop/pos core functions
|
|
internal void *arena_push(Arena *arena, U64 size, U64 align);
|
|
internal U64 arena_pos(Arena *arena);
|
|
internal void arena_pop_to(Arena *arena, U64 pos);
|
|
|
|
//- rjf: arena push/pop helpers
|
|
internal void arena_clear(Arena *arena);
|
|
internal void arena_pop(Arena *arena, U64 amt);
|
|
|
|
//- rjf: temporary arena scopes
|
|
internal Temp temp_begin(Arena *arena);
|
|
internal void temp_end(Temp temp);
|
|
|
|
//- rjf: push helper macros
|
|
#define push_array_no_zero_aligned(a, T, c, align) (T *)arena_push((a), sizeof(T)*(c), (align))
|
|
#define push_array_aligned(a, T, c, align) (T *)MemoryZero(push_array_no_zero_aligned(a, T, c, align), sizeof(T)*(c))
|
|
#define push_array_no_zero(a, T, c) push_array_no_zero_aligned(a, T, c, Max(8, AlignOf(T)))
|
|
#define push_array(a, T, c) push_array_aligned(a, T, c, Max(8, AlignOf(T)))
|
|
|
|
#endif // BASE_ARENA_H
|