/**
 * @file   malloc_internal.h
 * @brief  Internal data structures and macros for the ft_malloc allocator.
 */

#ifndef MALLOC_INTERNAL_H
#define MALLOC_INTERNAL_H

#include <stddef.h>

#define TINY_MAX 128
#define SMALL_MAX 1024
#define ALIGNMENT 16
/* Round x up to the nearest multiple of ALIGNMENT. */
#define ALIGN(x) (((x) + (ALIGNMENT - 1)) & ~(ALIGNMENT - 1))
#define MIN_ALLOC_COUNT 100

/* Header embedded before each allocation block inside a zone. */
typedef struct s_chunk
{
  size_t size;
  struct s_chunk *next;
  int is_free;
} t_chunk;

/* Header at the start of each mmap'd region. */
typedef struct s_zone
{
  struct s_zone *next;
  size_t size;
} t_zone;

/* Global state: one linked list per zone category. */
typedef struct s_heap
{
  t_zone *tiny;
  t_zone *small;
  t_zone *large;
} t_heap;

extern t_heap g_heap;

t_zone *zone_new (size_t alloc_max);

#endif