#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
#define PAGE_MASK (~(PAGE_SIZE - 1))
#define __ALIGN_MASK(v, mask) (((v) + (mask)) & ~(mask))
#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
#define PAGE_MASK (~(PAGE_SIZE - 1))
#define __ALIGN_MASK(v, mask) (((v) + (mask)) & ~(mask))