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fix realloc size detection when new size is larger than current chunk max size, add pthread mutex to make the functions thread safe

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tomoron
2024-12-05 18:59:07 +01:00
parent a9ad4492cc
commit 039d29f0d7
6 changed files with 52 additions and 30 deletions
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33
srcs/malloc.c
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@ -6,16 +6,14 @@
/* By: tomoron <tomoron@student.42angouleme.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/11/23 17:19:59 by tomoron #+# #+# */
/* Updated: 2024/12/03 19:01:33 by tomoron ### ########.fr */
/* Updated: 2024/12/05 17:01:08 by tomoron ### ########.fr */
/* */
/* ************************************************************************** */
#include "includes/malloc.h"
#include <stdio.h>
#include <errno.h>
#include <string.h>
t_allocations g_allocs;
pthread_mutex_t g_mallock = PTHREAD_MUTEX_INITIALIZER;
t_alloc *get_suitable_addr_in_chunk(t_mem_chunk *chunk, size_t size);
t_mem_chunk *create_new_chunk(int is_small, t_mem_chunk **chunk, \
@ -84,17 +82,24 @@ static void *pre_allocated(size_t size, t_mem_chunk **chunk, int is_small)
void *malloc(size_t size)
{
t_alloc *new;
t_alloc *res;
pthread_mutex_lock(&g_mallock);
if (size <= TINY_MALLOC)
return (pre_allocated(size, &(g_allocs.tiny), 0));
res = pre_allocated(size, &(g_allocs.tiny), 0);
else if (size <= SMALL_MALLOC)
return (pre_allocated(size, &(g_allocs.small), 1));
new = get_memory(size + sizeof(t_alloc), 1);
if (!new)
return (0);
new->size = size;
new->next = g_allocs.large;
g_allocs.large = new;
return ((char *)new + sizeof(t_alloc));
res = pre_allocated(size, &(g_allocs.small), 1);
else
{
res = get_memory(size + sizeof(t_alloc), 1);
if (res)
{
res->size = size;
res->next = g_allocs.large;
g_allocs.large = res;
res++;
}
}
pthread_mutex_unlock(&g_mallock);
return (res);
}