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still working on memory stuff

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Maieul BOYER 2024-05-08 19:35:13 +02:00
parent 8e90a858ad
commit 326c9318e4
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18 changed files with 206 additions and 77 deletions
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37
stdme/src/alloc/get_arena.c
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@ -6,15 +6,18 @@
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/05/07 09:47:50 by maiboyer #+# #+# */
/* Updated: 2024/05/07 22:04:20 by maiboyer ### ########.fr */
/* Updated: 2024/05/08 19:24:47 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "me/alloc/alloc.h"
#include "me/alloc/alloc_internal.h"
#include "me/fs/putendl_fd.h"
#include "me/fs/putnbr_fd.h"
#include "me/fs/putstr_fd.h"
#include "me/mem/mem_set_zero.h"
#include "me/num/usize.h"
#include <stdio.h>
#include <stdlib.h>
void *__libc_malloc(size_t size);
@ -37,6 +40,8 @@ t_arena_page *get_head_arena(void)
t_error alloc_arena_page(t_usize min_size, t_arena_page **out)
{
t_arena_block *block;
printf("Allocating page with size %zu", min_size);
min_size = usize_round_up_to(min_size, ARENA_SIZE_DEFAULT);
if (out == NULL)
return (ERROR);
@ -48,7 +53,7 @@ t_error alloc_arena_page(t_usize min_size, t_arena_page **out)
(*out)->next = NULL;
block = (t_arena_block *)((t_u8 *)*out + sizeof(**out));
block->end = true;
block->free = true;
block->used = false;
block->size = min_size - sizeof(*block);
return (NO_ERROR);
}
@ -65,17 +70,19 @@ t_error get_block_for_page(t_usize size, t_arena_page *page,
if (page->page_size - sizeof(t_arena_block) <= size)
return (ERROR);
cur = (void *)((t_u8 *)page + sizeof(*page));
while ((t_u8 *)cur < (t_u8 *)page + page->page_size + sizeof(*page))
while ((t_usize)((t_u8 *)cur - (t_u8 *)page) <
page->page_size - sizeof(*page))
{
if (cur->free && cur->size >= size)
if (!cur->used && cur->size >= size)
{
if (cur->size > size + sizeof(*cur))
if (cur->size > size + sizeof(*cur) * 2)
{
leftover = cur->size - size - sizeof(*cur);
cur->size = size;
next = (void *)((t_u8 *)cur + cur->size + sizeof(*cur));
next = (void *)(((t_usize)cur) + size);
next->size = leftover;
next->end = cur->end;
next->used = false;
cur->end = false;
}
*out = cur;
@ -85,3 +92,21 @@ t_error get_block_for_page(t_usize size, t_arena_page *page,
}
return (ERROR);
}
void print_pages_info(void)
{
t_arena_page *page;
t_i32 page_nb;
page = get_head_arena();
page_nb = 0;
while (page != NULL)
{
me_putstr_fd("Page ", 2);
me_putnbr_fd(page_nb++, 2);
me_putstr_fd(" with size ", 2);
me_putnbr_fd((t_i32)page->page_size, 2);
me_putstr_fd("\n", 2);
page = page->next;
}
}