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Allocator is fully normed

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Maieul BOYER 2024-07-10 17:41:59 +02:00
parent fc969750e4
commit 882d5cb5bb
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11 changed files with 351 additions and 325 deletions
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71
allocator/src/me_alloc/internals.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* internals.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/10 16:49:31 by maiboyer #+# #+# */
/* Updated: 2024/07/10 17:39:53 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "aq/internal_vg_funcs.h"
#include "aq/melloc_interal.h"
#include "me/types.h"
t_chunk *get_first_block(t_page *page)
{
t_chunk *chunk;
if (page == NULL)
return (NULL);
vg_mem_defined(page, sizeof(*page));
chunk = page->data;
vg_mem_no_access(page, sizeof(*page));
return (chunk);
}
t_chunk *get_next_block(t_chunk *chunk, bool find_zero)
{
t_chunk *next;
if (chunk == NULL)
return (NULL);
vg_mem_defined(chunk, sizeof(*chunk));
next = (void *)(chunk) + sizeof(*chunk) + chunk->size;
vg_mem_no_access(chunk, sizeof(*chunk));
vg_mem_defined(next, sizeof(*next));
if (!find_zero && next->size == 0)
{
vg_mem_no_access(next, sizeof(*next));
return (NULL);
}
vg_mem_no_access(next, sizeof(*next));
return (next);
}
t_chunk *split_block(t_chunk *chunk, t_usize size)
{
t_usize remaining;
t_chunk *next;
t_chunk *ac_next;
if (chunk == NULL)
return (NULL);
vg_mem_defined(chunk, sizeof(*chunk));
if (chunk->size > size + sizeof(*chunk) + (2 << PAGE_ALIGN))
{
remaining = chunk->size - size - sizeof(*chunk);
next = get_next_block(chunk, true);
vg_mem_defined(chunk, sizeof(*chunk));
chunk->size = size;
ac_next = get_next_block(chunk, true);
vg_mem_defined(ac_next, sizeof(*ac_next));
ac_next->used = false;
ac_next->size = remaining;
vg_mem_no_access(ac_next, sizeof(*ac_next));
}
vg_mem_no_access(chunk, sizeof(*chunk));
return (chunk);
}