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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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29
src/os/allocators/arena/mem_arena_allocator.c
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@@ -5,24 +5,33 @@
#include "../../mem/mem_os.h"
#include "../../../common/aliases/aliases.h"
wapp_intern void initialise_arena_allocator(Allocator *allocator);
wapp_intern void *mem_arena_alloc(u64 size, void *alloc_obj);
wapp_intern void *mem_arena_alloc_aligned(u64 size, u64 alignment, void *alloc_obj);
wapp_intern void *mem_arena_realloc(void *ptr, u64 old_size, u64 new_size, void *alloc_obj);
wapp_intern void *mem_arena_realloc_aligned(void *ptr, u64 old_size, u64 new_size, u64 alignment,
void *alloc_obj);
Allocator wapp_mem_arena_allocator_init_custom(u64 base_capacity, MemAllocFlags flags, b8 zero_buffer) {
Allocator wapp_mem_arena_allocator_init_with_buffer(u8 *buffer, u64 buffer_size) {
Allocator allocator = {0};
b8 initialised = wapp_mem_arena_init_custom((Arena **)(&allocator.obj), base_capacity, flags, zero_buffer);
b8 initialised = wapp_mem_arena_init_buffer((Arena **)(&allocator.obj), buffer, buffer_size);
if (!initialised) {
return allocator;
}
allocator.alloc = mem_arena_alloc;
allocator.alloc_aligned = mem_arena_alloc_aligned;
allocator.realloc = mem_arena_realloc;
allocator.realloc_aligned = mem_arena_realloc_aligned;
initialise_arena_allocator(&allocator);
return allocator;
}
Allocator wapp_mem_arena_allocator_init_custom(u64 base_capacity, MemAllocFlags flags, b8 zero_buffer) {
Allocator allocator = {0};
b8 initialised = wapp_mem_arena_init_allocated_custom((Arena **)(&allocator.obj), base_capacity, flags, zero_buffer);
if (!initialised) {
return allocator;
}
initialise_arena_allocator(&allocator);
return allocator;
}
@@ -36,6 +45,12 @@ void wapp_mem_arena_allocator_destroy(Allocator *allocator) {
*allocator = (Allocator){0};
}
wapp_intern void initialise_arena_allocator(Allocator *allocator) {
allocator->alloc = mem_arena_alloc;
allocator->alloc_aligned = mem_arena_alloc_aligned;
allocator->realloc = mem_arena_realloc;
allocator->realloc_aligned = mem_arena_realloc_aligned;
}
wapp_intern void *mem_arena_alloc(u64 size, void *alloc_obj) {
Arena *arena = (Arena *)alloc_obj;