ycaro02 / ft_malloc Goto Github PK

First bonus implementation : Manage the use of your malloc in a multi-threaded program (so to be “thread safe”
using the pthread lib).

This test return NULL for second realloc, print: '"Realloc2 return NULL'
void realloc_test()
{
char *b = malloc(3000);
b[0] = 2;
char *a = malloc(2);
a[0] = 'a';
int len = 100;
char *test = NULL;
test = realloc(test, len);
if (!test) {
printf("Realloc1 return NULL\n");
show_alloc_mem();
free_meta_data();
return ;
}
for (int i = 0; i < len; i++)
test[i] = 'k';
show_alloc_mem();
len = 900;
test = realloc(test, len);
if (!test) {
printf("Realloc2 return NULL\n");
// show_alloc_mem();
free_meta_data();
show_alloc_mem();
return ;
}
printf("Realloc ok\n");
// for (int i = 0; i < len; i++)
// test[i] = 'l';
// len = 3000;
// show_alloc_mem();
// test = realloc(test, len);
// for (int i = 0; i < len; i++)
// test[i] = 'z';
// show_alloc_mem();
}

Implement defragmentation, for this build a linked list remain free block addr instead of free_size in each page, this list can be build without allocate more memory see utils print define and malloc.h