#include <unistd.h>
#include <sys/mman.h>

#define ALIGNMENT 16
#define ALIGN(size) (((size) + (ALIGNMENT-1)) & ~(ALIGNMENT-1))

#define CHUNK_SIZE (1 << 14)
#define CHUNK_ALIGN(size) (((size)+(CHUNK_SIZE-1)) & ~(CHUNK_SIZE-1))

void *current_avail = NULL;
size_t current_avail_size = 0;

int mm_init() {
  current_avail = NULL;
  current_avail_size = 0;
  return 0;
}

void *mm_malloc(size_t size) {
  int newsize = ALIGN(size);
  void *p;

  if (current_avail_size < newsize) {
    current_avail = mmap(0, CHUNK_ALIGN(newsize),
			 PROT_READ | PROT_WRITE,
			 MAP_PRIVATE | MAP_ANON, 
			 -1, 0);
    current_avail_size = CHUNK_ALIGN(newsize);
  }

  p = current_avail;
  current_avail += newsize;
  current_avail_size -= newsize;

  return p;
}

void mm_free(void *p) {
}