69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* internals.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/07/10 16:49:31 by maiboyer #+# #+# */
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/* Updated: 2024/07/10 20:54:31 by maiboyer ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "aq/internal_vg_funcs.h"
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#include "aq/melloc_interal.h"
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#include "me/types.h"
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t_chunk *get_first_block(t_page *page)
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{
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t_chunk *chunk;
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if (page == NULL)
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return (NULL);
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vg_mem_defined(page, sizeof(*page));
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chunk = page->data;
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vg_mem_no_access(page, sizeof(*page));
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return (chunk);
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}
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t_chunk *get_next_block(t_chunk *chunk, bool find_zero)
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{
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t_chunk *next;
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if (chunk == NULL)
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return (NULL);
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vg_mem_defined(chunk, sizeof(*chunk));
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next = (void *)(chunk) + sizeof(*chunk) + chunk->size;
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vg_mem_no_access(chunk, sizeof(*chunk));
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vg_mem_defined(next, sizeof(*next));
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if (!find_zero && next->size == 0)
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{
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vg_mem_no_access(next, sizeof(*next));
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return (NULL);
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}
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vg_mem_no_access(next, sizeof(*next));
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return (next);
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}
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t_chunk *split_block(t_chunk *chunk, t_usize size)
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{
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t_usize remaining;
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t_chunk *ac_next;
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if (chunk == NULL)
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return (NULL);
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vg_mem_defined(chunk, sizeof(*chunk));
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if (chunk->size > size + sizeof(*chunk) + (2 << PAGE_ALIGN))
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{
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remaining = chunk->size - size - sizeof(*chunk);
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vg_mem_defined(chunk, sizeof(*chunk));
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chunk->size = size;
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ac_next = get_next_block(chunk, true);
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vg_mem_defined(ac_next, sizeof(*ac_next));
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ac_next->used = false;
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ac_next->size = remaining;
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vg_mem_no_access(ac_next, sizeof(*ac_next));
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}
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vg_mem_no_access(chunk, sizeof(*chunk));
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return (chunk);
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}
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