UNIX_malloc

Custom version of Linux memory allocation functions.

Using only brk and sbrk, I rewrote the following 5 C functions: malloc, calloc, realloc, reallocarray and free.

  void *malloc(size_t size);
  
  void  free(void *ptr);
  
  void *calloc(size_t nmemb, size_t size);
  
  void *realloc(void *ptr, size_t size);
  
  void *reallocarray(void *ptr, size_t nmemb, size_t size);