import sys
from typing import Any, Iterable, List, Optional, Protocol, Sequence, Tuple, Union

class _HasFileno(Protocol):
    def fileno(self) -> int: ...

_FileDescriptor = Union[int, _HasFileno]

EPOLLERR: int
EPOLLET: int
EPOLLHUP: int
EPOLLIN: int
EPOLLMSG: int
EPOLLONESHOT: int
EPOLLOUT: int
EPOLLPRI: int
EPOLLRDBAND: int
EPOLLRDNORM: int
EPOLLWRBAND: int
EPOLLWRNORM: int
EPOLL_RDHUP: int
KQ_EV_ADD: int
KQ_EV_CLEAR: int
KQ_EV_DELETE: int
KQ_EV_DISABLE: int
KQ_EV_ENABLE: int
KQ_EV_EOF: int
KQ_EV_ERROR: int
KQ_EV_FLAG1: int
KQ_EV_ONESHOT: int
KQ_EV_SYSFLAGS: int
KQ_FILTER_AIO: int
KQ_FILTER_NETDEV: int
KQ_FILTER_PROC: int
KQ_FILTER_READ: int
KQ_FILTER_SIGNAL: int
KQ_FILTER_TIMER: int
KQ_FILTER_VNODE: int
KQ_FILTER_WRITE: int
KQ_NOTE_ATTRIB: int
KQ_NOTE_CHILD: int
KQ_NOTE_DELETE: int
KQ_NOTE_EXEC: int
KQ_NOTE_EXIT: int
KQ_NOTE_EXTEND: int
KQ_NOTE_FORK: int
KQ_NOTE_LINK: int
KQ_NOTE_LINKDOWN: int
KQ_NOTE_LINKINV: int
KQ_NOTE_LINKUP: int
KQ_NOTE_LOWAT: int
KQ_NOTE_PCTRLMASK: int
KQ_NOTE_PDATAMASK: int
KQ_NOTE_RENAME: int
KQ_NOTE_REVOKE: int
KQ_NOTE_TRACK: int
KQ_NOTE_TRACKERR: int
KQ_NOTE_WRITE: int
PIPE_BUF: int
POLLERR: int
POLLHUP: int
POLLIN: int
POLLMSG: int
POLLNVAL: int
POLLOUT: int
POLLPRI: int
POLLRDBAND: int
POLLRDNORM: int
POLLWRBAND: int
POLLWRNORM: int

class poll:
    def __init__(self) -> None: ...
    def register(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
    def modify(self, fd: _FileDescriptor, eventmask: int) -> None: ...
    def unregister(self, fd: _FileDescriptor) -> None: ...
    def poll(self, timeout: Optional[float] = ...) -> List[Tuple[int, int]]: ...

def select(rlist: Sequence[Any], wlist: Sequence[Any], xlist: Sequence[Any],
           timeout: Optional[float] = ...) -> Tuple[List[Any],
                                                    List[Any],
                                                    List[Any]]: ...

if sys.version_info >= (3, 3):
    error = OSError
else:
    class error(Exception): ...

# BSD only
class kevent(object):
    data: Any
    fflags: int
    filter: int
    flags: int
    ident: int
    udata: Any
    def __init__(self, ident: _FileDescriptor, filter: int = ..., flags: int = ..., fflags: int = ..., data: Any = ..., udata: Any = ...) -> None: ...

# BSD only
class kqueue(object):
    closed: bool
    def __init__(self) -> None: ...
    def close(self) -> None: ...
    def control(self, changelist: Optional[Iterable[kevent]], max_events: int, timeout: float = ...) -> List[kevent]: ...
    def fileno(self) -> int: ...
    @classmethod
    def fromfd(cls, fd: _FileDescriptor) -> kqueue: ...

# Linux only
class epoll(object):
    if sys.version_info >= (3, 3):
        def __init__(self, sizehint: int = ..., flags: int = ...) -> None: ...
    else:
        def __init__(self, sizehint: int = ...) -> None: ...
    if sys.version_info >= (3, 4):
        def __enter__(self) -> epoll: ...
        def __exit__(self, *args: Any) -> None: ...
    def close(self) -> None: ...
    closed: bool
    def fileno(self) -> int: ...
    def register(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
    def modify(self, fd: _FileDescriptor, eventmask: int) -> None: ...
    def unregister(self, fd: _FileDescriptor) -> None: ...
    def poll(self, timeout: float = ..., maxevents: int = ...) -> List[Tuple[int, int]]: ...
    @classmethod
    def fromfd(cls, fd: _FileDescriptor) -> epoll: ...

if sys.version_info >= (3, 3):
    # Solaris only
    class devpoll:
        if sys.version_info >= (3, 4):
            def close(self) -> None: ...
            closed: bool
            def fileno(self) -> int: ...
        def register(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
        def modify(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
        def unregister(self, fd: _FileDescriptor) -> None: ...
        def poll(self, timeout: Optional[float] = ...) -> List[Tuple[int, int]]: ...