kevent.udata User defined value.

AbstractEventLoop.add_reader(fd, callback, *args) Start watching the file descriptor for read availability and then call the

epoll.poll(timeout=-1, maxevents=-1) Wait for events. timeout in seconds (float)

exception asyncio.InvalidStateError The operation is not allowed in this state.

class asyncio.Condition(lock=None, *, loop=None) A Condition implementation, asynchronous equivalent to

select.epoll(sizehint=-1, flags=0) (Only supported on Linux 2.5.44 and newer.) Return an edge polling object, which can be used

select.kqueue() (Only supported on BSD.) Returns a kernel queue object; see section Kqueue Objects below for the

devpoll.closed True if the polling object is closed.

AbstractEventLoop.remove_reader(fd) Stop watching the file descriptor for read availability.

devpoll.fileno() Return the file descriptor number of the polling object.