Function realloc

test/libmm/memalloc.cpp:140–157

}

void *realloc(void *block, size_t size)
{
	header_t *header;
	void *ret;
	if (!block || !size)
		return mymalloc(size);
	header = (header_t*)block - 1;
	if (header->s.size >= size)
		return block;
	ret = mymalloc(size);
	if (ret) {
		/* Relocate contents to the new bigger block */
		memcpy(ret, block, header->s.size);
		/* Free the old memory block */
		free(block);
	}
	return ret;
}

/* A debug function to print the entire link list */
void print_mem_list()