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beginning to lift vmem ops out of the arena

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ed
2025-02-05 13:42:36 -05:00
parent 8936ae9aa7
commit 268271e4a7
15 changed files with 1017 additions and 170 deletions
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code/base/arena.h
+41 -15
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@@ -2,6 +2,7 @@
# pragma once
# include "macros.h"
# include "base_types.h"
# include "memory_substrate.h"
#endif
// Copyright (c) 2024 Epic Games Tools
@@ -10,7 +11,7 @@
////////////////////////////////
//~ rjf: Constants
#define MD_ARENA_HEADER_SIZE 64
#define ARENA_HEADER_SIZE 64
////////////////////////////////
//~ rjf: Types
@@ -43,17 +44,18 @@ struct ArenaParams
typedef struct Arena Arena;
struct Arena
{
Arena* prev; // previous arena in chain
Arena* current; // current arena in chain
ArenaFlags flags;
U32 cmt_size;
U64 res_size;
U64 base_pos;
U64 pos;
U64 cmt;
U64 res;
AllocatorInfo backing;
Arena* prev; // previous arena in chain
Arena* current; // current arena in chain
ArenaFlags flags;
U32 cmt_size;
U64 res_size;
U64 base_pos;
U64 pos;
U64 cmt;
U64 res;
};
static_assert(sizeof(Arena) <= MD_ARENA_HEADER_SIZE, "sizeof(Arena) <= MD_ARENA_HEADER_SIZE");
static_assert(sizeof(Arena) <= ARENA_HEADER_SIZE, "sizeof(Arena) <= MD_ARENA_HEADER_SIZE");
typedef struct TempArena TempArena;
struct TempArena
@@ -65,27 +67,51 @@ struct TempArena
////////////////////////////////
//~ rjf: Arena Functions
//- rjf: arena creation/destruction
internal Arena* arena_alloc_(ArenaParams *params);
#define arena_alloc(...) arena_alloc_( & ( ArenaParams) { .reserve_size = MB(64), .commit_size = KB(64), __VA_ARGS__ } )
MD_API void* arena_allocator_proc(void* allocator_data, AllocType type, SSIZE size, SSIZE alignment, void* old_memory, SSIZE old_size, U64 flags);
internal void arena_release(Arena *arena);
//- rjf: arena creation/destruction
MD_API Arena* arena_alloc_(ArenaParams *params);
#define arena_alloc(...) arena_alloc_( & ( ArenaParams) { .reserve_size = MB(64), .commit_size = KB(64), __VA_ARGS__ } )
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 TempArena temp_arena_begin(Arena *arena);
internal void temp_arena_end(TempArena temp);
//- rjf: push helper macros
#ifndef push_array
#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 *)memory_zero(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, align_of(T)))
#define push_array(a, T, c) push_array_aligned (a, T, c, max(8, align_of(T)))
#endif
// Inlines
inline void
arena_release(Arena* arena)
{
for (Arena* n = arena->current, *prev = 0; n != 0; n = prev)
{
prev = n->prev;
// os_release(n, n->res);
alloc_free(arena->backing, n);
}
}