mirror of
https://github.com/Ed94/raddebugger.git
synced 2026-06-29 14:51:49 -07:00
Ryan Fleury
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
// Copyright (c) 2024 Epic Games Tools
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// Licensed under the MIT license (https://opensource.org/license/mit/)
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#ifndef BASE_ARENA_H
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#define BASE_ARENA_H
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////////////////////////////////
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//~ rjf: Constants
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#define ARENA_HEADER_SIZE 128
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#ifndef ARENA_RESERVE_SIZE
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# define ARENA_RESERVE_SIZE MB(64)
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#endif
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#ifndef ARENA_COMMIT_SIZE
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# define ARENA_COMMIT_SIZE KB(64)
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#endif
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#ifndef ARENA_RESERVE_SIZE_LARGE_PAGES
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# define ARENA_RESERVE_SIZE_LARGE_PAGES MB(8)
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#endif
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#ifndef ARENA_COMMIT_SIZE_LARGE_PAGES
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# define ARENA_COMMIT_SIZE_LARGE_PAGES MB(2)
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#endif
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////////////////////////////////
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//~ rjf: Arena Types
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typedef struct Arena Arena;
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struct Arena
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{
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struct Arena *prev;
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struct Arena *current;
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U64 base_pos;
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U64 pos;
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U64 cmt;
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U64 res;
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U64 align;
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struct ArenaDev *dev;
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B8 grow;
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B8 large_pages;
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};
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typedef struct Temp Temp;
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struct Temp
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{
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Arena *arena;
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U64 pos;
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};
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////////////////////////////////
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// Implementation
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internal Arena* arena_alloc__sized(U64 init_res, U64 init_cmt);
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internal Arena* arena_alloc(void);
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internal void arena_release(Arena *arena);
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internal void* arena_push__impl(Arena *arena, U64 size);
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internal U64 arena_pos(Arena *arena);
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internal void arena_pop_to(Arena *arena, U64 pos);
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internal void arena_absorb(Arena *arena, Arena *sub);
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////////////////////////////////
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// Wrappers
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internal void* arena_push(Arena *arena, U64 size);
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internal void* arena_push_contiguous(Arena *arena, U64 size);
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internal void arena_clear(Arena *arena);
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internal void arena_push_align(Arena *arena, U64 align);
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internal void arena_put_back(Arena *arena, U64 amt);
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internal Temp temp_begin(Arena *arena);
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internal void temp_end(Temp temp);
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////////////////////////////////
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//~ NOTE(allen): "Mini-Arena" Helper
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internal B32 ensure_commit(void **cmt, void *pos, U64 cmt_block_size);
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////////////////////////////////
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//~ NOTE(allen): Main API Macros
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#if !ENABLE_DEV
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# define push_array_no_zero(a,T,c) (T*)arena_push((a), sizeof(T)*(c))
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#else
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# define push_array_no_zero(a,T,c) (tctx_write_this_srcloc(), (T*)arena_push((a), sizeof(T)*(c)))
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#endif
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#define push_array_no_zero__no_annotation(a,T,c) (T*)arena_push__impl((a), sizeof(T)*(c))
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#define push_array(a,T,c) (T*)MemoryZero(push_array_no_zero(a,T,c), sizeof(T)*(c))
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#endif // BASE_ARENA_H
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