#define    mm_unlock1(x)    _mm_unlock(x,1)
#define    mm_lock2(x)        _mm_lock(x,2)
#define    mm_unlock2(x)    _mm_unlock(x,2)
#define    mm_lock3(x)        _mm_lock(x,3)
#define    mm_unlock3(x)    _mm_unlock(x,3)
#define    mm_lock4(x)        _mm_lock(x,4)
#define    mm_unlock4(x)    _mm_unlock(x,4)

#define MM_PROT_NONE 1
#define MM_PROT_READ 2
#define MM_PROT_WRITE 4
#define MM_PROT_EXEC 8

MM *mm_create(size_t size);                // create mm by mmap

size_t mm_size(MM *mm);
void mm_destroy(MM *mm);
int _mm_lock(MM *mm, int num);            // lock this mm

int _mm_unlock(MM *mm, int num);
int mm_protect(MM *mm, int mode);        // protect the mm to avoid read|write?

size_t mm_available(MM *mm);
size_t mm_maxsize(MM *mm);
void *mm_malloc(MM *mm, size_t size);
void mm_free(MM *mm, void *p);
void *mm_malloc_nolock(MM *mm, size_t size);
void mm_free_nolock(MM *mm, void *p);