#pragma once

#include <stddef.h>

#define KMALLOC_MAX_ALLOCATOR_SIZE 256

typedef struct kmalloc_header {
  size_t unit;
  size_t left;
  void *begin;
  struct kmalloc_header *page_prev, *page_next;
}__attribute__((packed)) kmalloc_header_t;

typedef struct {
  size_t left;
  kmalloc_header_t *page_begin;
} kmalloc_allocator_t;

void init_mman_kmalloc();
void *simple_alloc(size_t size);
void *mman_alloc(size_t size);
void mman_free(void *ptr);

extern void *(*kmalloc)(size_t size);
extern void (*kfree)(void *ptr);

extern kmalloc_allocator_t mman_kmalloc_pool[KMALLOC_MAX_ALLOCATOR_SIZE + 1];