/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_malloc.h                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thrieg < thrieg@student.42mulhouse.fr>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/11/17 15:06:51 by thrieg            #+#    #+#             */
/*   Updated: 2025/12/08 15:32:10 by thrieg           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#ifndef FT_MALLOC_H
#define FT_MALLOC_H

#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <pthread.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stddef.h>
#include "../libft/ft_hashmap.h"
#include "../libft/ft_vector.h"
#include "ft_malloc_public.h"

#define TINY_SIZE_MAX 64
#define SMALL_SIZE_MAX 4096
#define ALLIGN_BYTES _Alignof(max_align_t)

typedef enum e_type
{
	E_TINY,
	E_SMALL,
	E_LARGE
} t_type;

typedef struct s_zone
{
	t_type type;
	size_t size;
	struct s_zone *next; // lock g_mut
	struct s_zone *prev; // lock g_mut
} t_zone;

typedef struct s_header
{
	size_t size;   // lock
	bool occupied; // lock
	t_zone *zone;
	char padding[8];
} t_header;

typedef struct s_state
{
	t_zone *tiny_zone;	  // lock g_mut
	t_zone *small_zone;	  // lock g_mut
	t_zone *large_zone;	  // lock g_mut, 1 zone per alloc for large
	unsigned char patern; // patern set in MALLOC_PERTURB_ environment variable (lock g_mut)
	bool is_init;
} t_state;

extern t_state g_state;
extern pthread_mutex_t g_mut; // never lock this inside a zone mut, only the opposite

void *add_large(size_t size);
void *add_small(size_t size);
void *add_tiny(size_t size);
void *add_page(t_type type);
void init_env_variables();

#endif