// defined in architecture specific module
use c_long;

s! {
    pub struct sockaddr_un {
        pub sun_family: ::sa_family_t,
        pub sun_path: [::c_char; 108usize],
    }
}

pub const AF_UNIX: ::c_int = 1;

pub const RTLD_DEFAULT: *mut ::c_void = -2isize as *mut ::c_void;

pub const UTIME_OMIT: c_long = -1;
pub const AT_FDCWD: ::c_int = -2;

pub const O_DIRECTORY: ::c_int = 0x200000;
pub const O_NOFOLLOW: ::c_int = 0x100000;

pub const AT_EACCESS: ::c_int = 1;
pub const AT_SYMLINK_NOFOLLOW: ::c_int = 2;
pub const AT_SYMLINK_FOLLOW: ::c_int = 4;
pub const AT_REMOVEDIR: ::c_int = 8;

// signal.h
pub const SIG_BLOCK: ::c_int = 1;
pub const SIG_UNBLOCK: ::c_int = 2;
pub const SIG_SETMASK: ::c_int = 0;
pub const SIGHUP: ::c_int = 1;
pub const SIGINT: ::c_int = 2;
pub const SIGQUIT: ::c_int = 3;
pub const SIGILL: ::c_int = 4;
pub const SIGTRAP: ::c_int = 5;
pub const SIGABRT: ::c_int = 6;
pub const SIGEMT: ::c_int = 7;
pub const SIGFPE: ::c_int = 8;
pub const SIGKILL: ::c_int = 9;
pub const SIGBUS: ::c_int = 10;
pub const SIGSEGV: ::c_int = 11;
pub const SIGSYS: ::c_int = 12;
pub const SIGPIPE: ::c_int = 13;
pub const SIGALRM: ::c_int = 14;
pub const SIGTERM: ::c_int = 15;
pub const SIGURG: ::c_int = 16;
pub const SIGSTOP: ::c_int = 17;
pub const SIGTSTP: ::c_int = 18;
pub const SIGCONT: ::c_int = 19;
pub const SIGCHLD: ::c_int = 20;
pub const SIGCLD: ::c_int = 20;
pub const SIGTTIN: ::c_int = 21;
pub const SIGTTOU: ::c_int = 22;
pub const SIGIO: ::c_int = 23;
pub const SIGWINCH: ::c_int = 24;
pub const SIGUSR1: ::c_int = 25;
pub const SIGUSR2: ::c_int = 26;
pub const SIGRTMIN: ::c_int = 27;
pub const SIGRTMAX: ::c_int = 31;
pub const SIGXCPU: ::c_int = 24;
pub const SIGXFSZ: ::c_int = 25;
pub const SIGVTALRM: ::c_int = 26;
pub const SIGPROF: ::c_int = 27;

pub const SA_NOCLDSTOP: ::c_ulong = 0x00000001;
pub const SA_SIGINFO: ::c_ulong = 0x00000002;
pub const SA_ONSTACK: ::c_ulong = 0x00000004;

pub const EAI_AGAIN: ::c_int = 2;
pub const EAI_BADFLAGS: ::c_int = 3;
pub const EAI_FAIL: ::c_int = 4;
pub const EAI_SERVICE: ::c_int = 9;
pub const EAI_SYSTEM: ::c_int = 11;
pub const EAI_OVERFLOW: ::c_int = 14;

pub const _SC_PAGESIZE: ::c_int = 8;
pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 51;
pub const PTHREAD_STACK_MIN: ::size_t = 0;

// sys/wait.h
pub const WNOHANG: ::c_int = 1;
pub const WUNTRACED: ::c_int = 2;

// sys/socket.h
pub const SOMAXCONN: ::c_int = 128;

safe_f! {
    pub {const} fn WIFSTOPPED(status: ::c_int) -> bool {
        (status & 0xff) == 0x7f
    }

    pub {const} fn WSTOPSIG(status: ::c_int) -> ::c_int {
        // (status >> 8) & 0xff
        WEXITSTATUS(status)
    }

    pub {const} fn WIFSIGNALED(status: ::c_int) -> bool {
        ((status & 0x7f) > 0) && ((status & 0x7f) < 0x7f)
    }

    pub {const} fn WTERMSIG(status: ::c_int) -> ::c_int {
        status & 0x7f
    }

    pub {const} fn WIFEXITED(status: ::c_int) -> bool {
        (status & 0xff) == 0
    }

    pub {const} fn WEXITSTATUS(status: ::c_int) -> ::c_int {
        (status >> 8) & 0xff
    }

    // RTEMS doesn't have native WIFCONTINUED.
    pub {const} fn WIFCONTINUED(_status: ::c_int) -> bool {
        true
    }

    // RTEMS doesn't have native WCOREDUMP.
    pub {const} fn WCOREDUMP(_status: ::c_int) -> bool {
        false
    }
}

extern "C" {
    pub fn futimens(fd: ::c_int, times: *const ::timespec) -> ::c_int;
    pub fn writev(fd: ::c_int, iov: *const ::iovec, iovcnt: ::c_int) -> ::ssize_t;
    pub fn readv(fd: ::c_int, iov: *const ::iovec, iovcnt: ::c_int) -> ::ssize_t;

    pub fn pthread_create(
        native: *mut ::pthread_t,
        attr: *const ::pthread_attr_t,
        f: extern "C" fn(_: *mut ::c_void) -> *mut ::c_void,
        value: *mut ::c_void,
    ) -> ::c_int;

    pub fn pthread_condattr_setclock(
        attr: *mut ::pthread_condattr_t,
        clock_id: ::clockid_t,
    ) -> ::c_int;

    pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;

    pub fn arc4random_buf(buf: *mut core::ffi::c_void, nbytes: ::size_t);

    pub fn setgroups(ngroups: ::c_int, grouplist: *const ::gid_t) -> ::c_int;
}