#ifndef INCLUDED_BUDDY_H
#define INCLUDED_BUDDY_H

#ifndef INCLUDED_OS_TYPES_H
#include <os_types.h>
#endif /*INCLUDED_OS_TYPES_H*/

/* ------------------------------------------------------------------------------------------------------------------ */
/* https://www.gingerbill.org/article/2021/12/02/memory-allocation-strategies-006/ */

typedef struct buddy_block_t{
    os_size_t size;
    os_bool_t is_free;
}buddy_block_t;

typedef struct buddy_t{
    buddy_block_t* head;
    buddy_block_t* tail;
    int alignment;
}buddy_t;

/* ------------------------------------------------------------------------------------------------------------------ */
/*  */

void buddy_init(buddy_t* self, void* buf, os_size_t buf_size /*POWER_OF_2*/, os_size_t alignment /*POWER_OF_2*/);

void buddy_destroy(buddy_t* self);

void* buddy_alloc(buddy_t* self, os_size_t size);

void* buddy_calloc(buddy_t* b, os_size_t count, os_size_t size);

void* buddy_realloc(buddy_t* self, void* ptr, os_size_t size);

void buddy_free(buddy_t* self, void* ptr);

#endif /*INCLUDED_BUDDY_H*/