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Add support for initialising arena with backing buffer

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Abdelrahman Said
2026-01-03 18:36:30 +00:00
parent 83b879a180
commit 326265722e
12 changed files with 195 additions and 61 deletions
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21
src/os/allocators/arena/mem_arena.h
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@@ -13,21 +13,22 @@ BEGIN_C_LINKAGE
typedef struct Arena Arena;
#define wapp_mem_arena_init(arena_dptr, base_capacity) \
(wapp_mem_arena_init_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE, false))
#define wapp_mem_arena_init_commit(arena_dptr, base_capacity) \
(wapp_mem_arena_init_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE | WAPP_MEM_ALLOC_COMMIT, false))
#define wapp_mem_arena_init_zero(arena_dptr, base_capacity) \
(wapp_mem_arena_init_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE, true))
#define wapp_mem_arena_init_commit_and_zero(arena_dptr, base_capacity) \
(wapp_mem_arena_init_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE | WAPP_MEM_ALLOC_COMMIT, true))
#define wapp_mem_arena_init_allocated(arena_dptr, base_capacity) \
(wapp_mem_arena_init_allocated_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE, false))
#define wapp_mem_arena_init_allocated_commit(arena_dptr, base_capacity) \
(wapp_mem_arena_init_allocated_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE | WAPP_MEM_ALLOC_COMMIT, false))
#define wapp_mem_arena_init_allocated_zero(arena_dptr, base_capacity) \
(wapp_mem_arena_init_allocated_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE, true))
#define wapp_mem_arena_init_allocated_commit_and_zero(arena_dptr, base_capacity) \
(wapp_mem_arena_init_allocated_custom(arena_dptr, base_capacity, WAPP_MEM_ALLOC_RESERVE | WAPP_MEM_ALLOC_COMMIT, true))
b8 wapp_mem_arena_init_buffer(Arena **arena, u8 *buffer, u64 buffer_size);
/**
* Arena initialisation function. `wapp_mem_arena_init_custom` provides the most
* Arena initialisation function. `wapp_mem_arena_init_allocated_custom` provides the most
* control over how the Arena is initialised. Wrapper macros are provided for
* easier use.
*/
b8 wapp_mem_arena_init_custom(Arena **arena, u64 base_capacity, MemAllocFlags flags, b8 zero_buffer);
b8 wapp_mem_arena_init_allocated_custom(Arena **arena, u64 base_capacity, MemAllocFlags flags, b8 zero_buffer);
void *wapp_mem_arena_alloc(Arena *arena, u64 size);
void *wapp_mem_arena_alloc_aligned(Arena *arena, u64 size, u64 alignment);
void *wapp_mem_arena_realloc(Arena *arena, void *ptr, u64 old_size, u64 new_size);