allocator.h

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#pragma once
 
#include <kiba/defines.h>
 
typedef enum allocator_type {
    ALLOCATOR_LINEAR,
    ALLOCATOR_FREE_LIST,
    ALLOCATOR_SYSTEM,
} allocator_type;
 
struct allocator;
 
typedef b8 (*allocator_impl_create_fn)(struct allocator *alloc, usize size);
typedef void (*allocator_impl_destroy_fn)(struct allocator *alloc);
typedef void *(*allocator_impl_allocate_fn)(struct allocator *alloc, usize size);
typedef void (*allocator_impl_free_fn)(struct allocator *alloc, void *mem, usize size);
typedef void (*allocator_impl_free_all_fn)(struct allocator *alloc);
 
typedef struct allocator_impl {
    allocator_impl_destroy_fn  destroy;
    allocator_impl_allocate_fn allocate;
    allocator_impl_free_fn     free;
    allocator_impl_free_all_fn free_all;
} allocator_impl;
 
typedef struct allocator {
    allocator_impl   impl;
    void            *state;
} allocator;
 
KB_API b8 allocator_create(allocator *alloc, allocator_type type, usize size);
 
KB_API b8 allocator_create_custom(allocator *alloc, allocator_impl_create_fn create_fn, usize size);
 
KB_API void allocator_destroy(allocator *alloc);
 
KB_API void *allocator_allocate(allocator *alloc, usize size);
 
KB_API void *allocator_allocate_aligned(allocator *alloc, usize size, usize alignment);
 
KB_API void *allocator_reallocate(allocator *alloc, void *original, usize new_size);
 
KB_API void *allocator_reallocate_aligned(allocator *alloc, void *original, usize new_size, usize alignment);
 
KB_API void allocator_free(allocator *alloc, void *mem);
 
KB_API void allocator_free_all(allocator *alloc);
 
KB_API void allocator_implementation(allocator                 *alloc,
                                     allocator_impl_destroy_fn  destroy,
                                     allocator_impl_allocate_fn allocate,
                                     allocator_impl_free_fn     free,
                                     allocator_impl_free_all_fn free_all);