// arm64-specific declarations that are intended to be imported into the POSIX namespace.
// This does include Linux-only APIs.

const std = @import("../../../std.zig");
const linux = std.os.linux;
const socklen_t = linux.socklen_t;
const iovec = linux.iovec;
const iovec_const = linux.iovec_const;
const uid_t = linux.uid_t;
const gid_t = linux.gid_t;
const pid_t = linux.pid_t;
const stack_t = linux.stack_t;
const sigset_t = linux.sigset_t;
pub const SYS = extern enum(usize) {
    io_setup = 0,
    io_destroy = 1,
    io_submit = 2,
    io_cancel = 3,
    io_getevents = 4,
    setxattr = 5,
    lsetxattr = 6,
    fsetxattr = 7,
    getxattr = 8,
    lgetxattr = 9,
    fgetxattr = 10,
    listxattr = 11,
    llistxattr = 12,
    flistxattr = 13,
    removexattr = 14,
    lremovexattr = 15,
    fremovexattr = 16,
    getcwd = 17,
    lookup_dcookie = 18,
    eventfd2 = 19,
    epoll_create1 = 20,
    epoll_ctl = 21,
    epoll_pwait = 22,
    dup = 23,
    dup3 = 24,
    fcntl = 25,
    inotify_init1 = 26,
    inotify_add_watch = 27,
    inotify_rm_watch = 28,
    ioctl = 29,
    ioprio_set = 30,
    ioprio_get = 31,
    flock = 32,
    mknodat = 33,
    mkdirat = 34,
    unlinkat = 35,
    symlinkat = 36,
    linkat = 37,
    renameat = 38,
    umount2 = 39,
    mount = 40,
    pivot_root = 41,
    nfsservctl = 42,
    statfs = 43,
    fstatfs = 44,
    truncate = 45,
    ftruncate = 46,
    fallocate = 47,
    faccessat = 48,
    chdir = 49,
    fchdir = 50,
    chroot = 51,
    fchmod = 52,
    fchmodat = 53,
    fchownat = 54,
    fchown = 55,
    openat = 56,
    close = 57,
    vhangup = 58,
    pipe2 = 59,
    quotactl = 60,
    getdents64 = 61,
    lseek = 62,
    read = 63,
    write = 64,
    readv = 65,
    writev = 66,
    pread64 = 67,
    pwrite64 = 68,
    preadv = 69,
    pwritev = 70,
    sendfile = 71,
    pselect6 = 72,
    ppoll = 73,
    signalfd4 = 74,
    vmsplice = 75,
    splice = 76,
    tee = 77,
    readlinkat = 78,
    fstatat = 79,
    fstat = 80,
    sync = 81,
    fsync = 82,
    fdatasync = 83,
    sync_file_range2 = 84,
    sync_file_range = 84,
    timerfd_create = 85,
    timerfd_settime = 86,
    timerfd_gettime = 87,
    utimensat = 88,
    acct = 89,
    capget = 90,
    capset = 91,
    personality = 92,
    exit = 93,
    exit_group = 94,
    waitid = 95,
    set_tid_address = 96,
    unshare = 97,
    futex = 98,
    set_robust_list = 99,
    get_robust_list = 100,
    nanosleep = 101,
    getitimer = 102,
    setitimer = 103,
    kexec_load = 104,
    init_module = 105,
    delete_module = 106,
    timer_create = 107,
    timer_gettime = 108,
    timer_getoverrun = 109,
    timer_settime = 110,
    timer_delete = 111,
    clock_settime = 112,
    clock_gettime = 113,
    clock_getres = 114,
    clock_nanosleep = 115,
    syslog = 116,
    ptrace = 117,
    sched_setparam = 118,
    sched_setscheduler = 119,
    sched_getscheduler = 120,
    sched_getparam = 121,
    sched_setaffinity = 122,
    sched_getaffinity = 123,
    sched_yield = 124,
    sched_get_priority_max = 125,
    sched_get_priority_min = 126,
    sched_rr_get_interval = 127,
    restart_syscall = 128,
    kill = 129,
    tkill = 130,
    tgkill = 131,
    sigaltstack = 132,
    rt_sigsuspend = 133,
    rt_sigaction = 134,
    rt_sigprocmask = 135,
    rt_sigpending = 136,
    rt_sigtimedwait = 137,
    rt_sigqueueinfo = 138,
    rt_sigreturn = 139,
    setpriority = 140,
    getpriority = 141,
    reboot = 142,
    setregid = 143,
    setgid = 144,
    setreuid = 145,
    setuid = 146,
    setresuid = 147,
    getresuid = 148,
    setresgid = 149,
    getresgid = 150,
    setfsuid = 151,
    setfsgid = 152,
    times = 153,
    setpgid = 154,
    getpgid = 155,
    getsid = 156,
    setsid = 157,
    getgroups = 158,
    setgroups = 159,
    uname = 160,
    sethostname = 161,
    setdomainname = 162,
    getrlimit = 163,
    setrlimit = 164,
    getrusage = 165,
    umask = 166,
    prctl = 167,
    getcpu = 168,
    gettimeofday = 169,
    settimeofday = 170,
    adjtimex = 171,
    getpid = 172,
    getppid = 173,
    getuid = 174,
    geteuid = 175,
    getgid = 176,
    getegid = 177,
    gettid = 178,
    sysinfo = 179,
    mq_open = 180,
    mq_unlink = 181,
    mq_timedsend = 182,
    mq_timedreceive = 183,
    mq_notify = 184,
    mq_getsetattr = 185,
    msgget = 186,
    msgctl = 187,
    msgrcv = 188,
    msgsnd = 189,
    semget = 190,
    semctl = 191,
    semtimedop = 192,
    semop = 193,
    shmget = 194,
    shmctl = 195,
    shmat = 196,
    shmdt = 197,
    socket = 198,
    socketpair = 199,
    bind = 200,
    listen = 201,
    accept = 202,
    connect = 203,
    getsockname = 204,
    getpeername = 205,
    sendto = 206,
    recvfrom = 207,
    setsockopt = 208,
    getsockopt = 209,
    shutdown = 210,
    sendmsg = 211,
    recvmsg = 212,
    readahead = 213,
    brk = 214,
    munmap = 215,
    mremap = 216,
    add_key = 217,
    request_key = 218,
    keyctl = 219,
    clone = 220,
    execve = 221,
    mmap = 222,
    fadvise64 = 223,
    swapon = 224,
    swapoff = 225,
    mprotect = 226,
    msync = 227,
    mlock = 228,
    munlock = 229,
    mlockall = 230,
    munlockall = 231,
    mincore = 232,
    madvise = 233,
    remap_file_pages = 234,
    mbind = 235,
    get_mempolicy = 236,
    set_mempolicy = 237,
    migrate_pages = 238,
    move_pages = 239,
    rt_tgsigqueueinfo = 240,
    perf_event_open = 241,
    accept4 = 242,
    recvmmsg = 243,
    arch_specific_syscall = 244,
    wait4 = 260,
    prlimit64 = 261,
    fanotify_init = 262,
    fanotify_mark = 263,
    clock_adjtime = 266,
    syncfs = 267,
    setns = 268,
    sendmmsg = 269,
    process_vm_readv = 270,
    process_vm_writev = 271,
    kcmp = 272,
    finit_module = 273,
    sched_setattr = 274,
    sched_getattr = 275,
    renameat2 = 276,
    seccomp = 277,
    getrandom = 278,
    memfd_create = 279,
    bpf = 280,
    execveat = 281,
    userfaultfd = 282,
    membarrier = 283,
    mlock2 = 284,
    copy_file_range = 285,
    preadv2 = 286,
    pwritev2 = 287,
    pkey_mprotect = 288,
    pkey_alloc = 289,
    pkey_free = 290,
    statx = 291,
    io_pgetevents = 292,
    rseq = 293,
    kexec_file_load = 294,
    pidfd_send_signal = 424,
    io_uring_setup = 425,
    io_uring_enter = 426,
    io_uring_register = 427,
    open_tree = 428,
    move_mount = 429,
    fsopen = 430,
    fsconfig = 431,
    fsmount = 432,
    fspick = 433,
    pidfd_open = 434,
    clone3 = 435,
    openat2 = 437,
    pidfd_getfd = 438,

    _,
};

pub const O_CREAT = 0o100;
pub const O_EXCL = 0o200;
pub const O_NOCTTY = 0o400;
pub const O_TRUNC = 0o1000;
pub const O_APPEND = 0o2000;
pub const O_NONBLOCK = 0o4000;
pub const O_DSYNC = 0o10000;
pub const O_SYNC = 0o4010000;
pub const O_RSYNC = 0o4010000;
pub const O_DIRECTORY = 0o40000;
pub const O_NOFOLLOW = 0o100000;
pub const O_CLOEXEC = 0o2000000;

pub const O_ASYNC = 0o20000;
pub const O_DIRECT = 0o200000;
pub const O_LARGEFILE = 0o400000;
pub const O_NOATIME = 0o1000000;
pub const O_PATH = 0o10000000;
pub const O_TMPFILE = 0o20040000;
pub const O_NDELAY = O_NONBLOCK;

pub const F_DUPFD = 0;
pub const F_GETFD = 1;
pub const F_SETFD = 2;
pub const F_GETFL = 3;
pub const F_SETFL = 4;

pub const F_SETOWN = 8;
pub const F_GETOWN = 9;
pub const F_SETSIG = 10;
pub const F_GETSIG = 11;

pub const F_GETLK = 5;
pub const F_SETLK = 6;
pub const F_SETLKW = 7;

pub const F_RDLCK = 0;
pub const F_WRLCK = 1;
pub const F_UNLCK = 2;

pub const LOCK_SH = 1;
pub const LOCK_EX = 2;
pub const LOCK_UN = 8;
pub const LOCK_NB = 4;

pub const F_SETOWN_EX = 15;
pub const F_GETOWN_EX = 16;

pub const F_GETOWNER_UIDS = 17;

/// stack-like segment
pub const MAP_GROWSDOWN = 0x0100;

/// ETXTBSY
pub const MAP_DENYWRITE = 0x0800;

/// mark it as an executable
pub const MAP_EXECUTABLE = 0x1000;

/// pages are locked
pub const MAP_LOCKED = 0x2000;

/// don't check for reservations
pub const MAP_NORESERVE = 0x4000;

pub const VDSO_CGT_SYM = "__kernel_clock_gettime";
pub const VDSO_CGT_VER = "LINUX_2.6.39";

pub const Flock = extern struct {
    l_type: i16,
    l_whence: i16,
    l_start: off_t,
    l_len: off_t,
    l_pid: pid_t,
    __unused: [4]u8,
};

pub const msghdr = extern struct {
    msg_name: ?*sockaddr,
    msg_namelen: socklen_t,
    msg_iov: [*]iovec,
    msg_iovlen: i32,
    __pad1: i32,
    msg_control: ?*c_void,
    msg_controllen: socklen_t,
    __pad2: socklen_t,
    msg_flags: i32,
};

pub const msghdr_const = extern struct {
    msg_name: ?*const sockaddr,
    msg_namelen: socklen_t,
    msg_iov: [*]iovec_const,
    msg_iovlen: i32,
    __pad1: i32,
    msg_control: ?*c_void,
    msg_controllen: socklen_t,
    __pad2: socklen_t,
    msg_flags: i32,
};

pub const blksize_t = i32;
pub const nlink_t = u32;
pub const time_t = isize;
pub const mode_t = u32;
pub const off_t = isize;
pub const ino_t = usize;
pub const dev_t = usize;
pub const blkcnt_t = isize;

/// Renamed to Stat to not conflict with the stat function.
/// atime, mtime, and ctime have functions to return `timespec`,
/// because although this is a POSIX API, the layout and names of
/// the structs are inconsistent across operating systems, and
/// in C, macros are used to hide the differences. Here we use
/// methods to accomplish this.
pub const Stat = extern struct {
    dev: dev_t,
    ino: ino_t,
    mode: mode_t,
    nlink: nlink_t,
    uid: uid_t,
    gid: gid_t,
    rdev: dev_t,
    __pad: usize,
    size: off_t,
    blksize: blksize_t,
    __pad2: i32,
    blocks: blkcnt_t,
    atim: timespec,
    mtim: timespec,
    ctim: timespec,
    __unused: [2]u32,

    pub fn atime(self: Stat) timespec {
        return self.atim;
    }

    pub fn mtime(self: Stat) timespec {
        return self.mtim;
    }

    pub fn ctime(self: Stat) timespec {
        return self.ctim;
    }
};

pub const timespec = extern struct {
    tv_sec: time_t,
    tv_nsec: isize,
};

pub const timeval = extern struct {
    tv_sec: isize,
    tv_usec: isize,
};

pub const timezone = extern struct {
    tz_minuteswest: i32,
    tz_dsttime: i32,
};

pub const mcontext_t = extern struct {
    fault_address: usize,
    regs: [31]usize,
    sp: usize,
    pc: usize,
    pstate: usize,
    // Make sure the field is correctly aligned since this area
    // holds various FP/vector registers
    reserved1: [256 * 16]u8 align(16),
};

pub const ucontext_t = extern struct {
    flags: usize,
    link: *ucontext_t,
    stack: stack_t,
    sigmask: sigset_t,
    mcontext: mcontext_t,
};

pub const Elf_Symndx = u32;
