#define MAP_FAILED ((void*)-1)

#define PROT_NONE 0
#define PROT_READ 1
#define PROT_WRITE 2
#define PROT_EXEC 4
#define PROT_GROWSDOWN 0x01000000
#define PROT_GROWSUP 0x02000000

#define MAP_SHARED 0x01
#define MAP_PRIVATE 0x02
#define MAP_FIXED 0x10

#define MAP_TYPE 0x0f
#define MAP_FILE 0x00
#define MAP_ANON 0x20
#define MAP_ANONYMOUS MAP_ANON
#define MAP_32BIT 0x40
#define MAP_NORESERVE 0x4000
#define MAP_GROWSDOWN 0x0100
#define MAP_DENYWRITE 0x0800
#define MAP_EXECUTABLE 0x1000
#define MAP_LOCKED 0x2000
#define MAP_POPULATE 0x8000
#define MAP_NONBLOCK 0x10000
#define MAP_STACK 0x20000
#define MAP_HUGETLB 0x40000

#define POSIX_MADV_NORMAL 0
#define POSIX_MADV_RANDOM 1
#define POSIX_MADV_SEQUENTIAL 2
#define POSIX_MADV_WILLNEED 3
#define POSIX_MADV_DONTNEED 0

#define MS_ASYNC 1
#define MS_INVALIDATE 2
#define MS_SYNC 4

#define MCL_CURRENT 1
#define MCL_FUTURE 2
#define MCL_ONFAULT 4

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define MADV_NORMAL 0
#define MADV_RANDOM 1
#define MADV_SEQUENTIAL 2
#define MADV_WILLNEED 3
#define MADV_DONTNEED 4
#define MADV_REMOVE 9
#define MADV_DONTFORK 10
#define MADV_DOFORK 11
#define MADV_MERGEABLE 12
#define MADV_UNMERGEABLE 13
#define MADV_HUGEPAGE 14
#define MADV_NOHUGEPAGE 15
#define MADV_DONTDUMP 16
#define MADV_DODUMP 17
#define MADV_HWPOISON 100
#define MADV_SOFT_OFFLINE 101
#endif