twisted.internet.posixbase._ContinuousPolling(_PollLikeMixin, _DisconnectSelectableMixin)
class documentationtwisted.internet.posixbase
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Implements interfaces: twisted.internet.interfaces.IReactorFDSet
Schedule reads and writes based on the passage of time, rather than notification.
This is useful for supporting polling filesystem files, which
epoll(7)
does not support.
The implementation uses _PollLikeMixin
,
which is a bit hacky, but re-implementing and testing the relevant code yet
again is unappealing.
Method | __init__ | Undocumented |
Method | iterate | Call doRead and doWrite on all readers and
writers respectively. |
Method | addReader | Add a FileDescriptor for notification of data available to
read. |
Method | addWriter | Add a FileDescriptor for notification of data available to
write. |
Method | removeReader | Remove a FileDescriptor from notification of data available
to read. |
Method | removeWriter | Remove a FileDescriptor from notification of data available
to write. |
Method | removeAll | Remove all readers and writers. |
Method | getReaders | Return a list of the readers. |
Method | getWriters | Return a list of the writers. |
Method | isReading | Checks if the file descriptor is currently being observed for read readiness. |
Method | isWriting | Checks if the file descriptor is currently being observed for write readiness. |
Instance Variable | _reactor | The EPollReactor
that is using this instance. |
Instance Variable | _loop | A LoopingCall that drives the polling, or None . |
Instance Variable | _readers | A set of FileDescriptor objects that should be
read from. |
Instance Variable | _writers | A set of FileDescriptor objects that should be
written to. |
Method | _checkLoop | Start or stop a LoopingCall based on whether there are
readers and writers. |
Inherited from _PollLikeMixin:
Method | _doReadOrWrite | fd is available for read or write, do the work and raise errors if necessary. |
Inherited from _DisconnectSelectableMixin:
Method | _disconnectSelectable | Utility function for disconnecting a selectable. |
Start or stop a LoopingCall
based on whether there are
readers and writers.
Add a FileDescriptor
for notification of data available to
read.
Add a FileDescriptor
for notification of data available to
write.
Remove a FileDescriptor
from notification of data available
to read.
Remove a FileDescriptor
from notification of data available
to write.
Checks if the file descriptor is currently being observed for read readiness.
Parameters | fd | The file descriptor being checked. (type: twisted.internet.abstract.FileDescriptor ) |
Returns | True if the file descriptor is being observed for read
readiness, False otherwise. (type: bool ) |
Checks if the file descriptor is currently being observed for write readiness.
Parameters | fd | The file descriptor being checked. (type: twisted.internet.abstract.FileDescriptor ) |
Returns | True if the file descriptor is being observed for write
readiness, False otherwise. (type: bool ) |