twisted.internet.win32eventreactor.Win32Reactor : API documentation

Implements interfaces: twisted.internet.interfaces.IReactorFDSet, twisted.internet.interfaces.IReactorWin32Events

Reactor that uses Win32 event APIs.

Method	__init__	Undocumented
Method	addEvent	Add a new win32 event to the event loop.
Method	removeEvent	Remove an event.
Method	addReader	Add a socket FileDescriptor for notification of data available to read.
Method	addWriter	Add a socket FileDescriptor for notification of data available to write.
Method	removeReader	Remove a Selectable for notification of data available to read.
Method	removeWriter	Remove a Selectable for notification of data available to write.
Method	removeAll	Remove all selectables, and return a list of them.
Method	getReaders	Return the list of file descriptors currently monitored for input events by the reactor.
Method	getWriters	Return the list file descriptors currently monitored for output events by the reactor.
Method	doWaitForMultipleEvents	Undocumented
Instance Variable	_reads	A dictionary mapping `FileDescriptor` instances to a win32 event object used to check for read events for that descriptor.
Instance Variable	_writes	A dictionary mapping `FileDescriptor` instances to a arbitrary value. Keys in this dictionary will be given a chance to write out their data.
Instance Variable	_events	A dictionary mapping win32 event object to tuples of `FileDescriptor` instances and event masks.
Instance Variable	_closedAndReading	Along with `_closedAndNotReading`, keeps track of descriptors which have had close notification delivered from the OS but which we have not finished reading data from. MsgWaitForMultipleObjects will only deliver close notification to us once, so we remember it in these two dictionaries until we're ready to act on it. The OS has delivered close notification for each descriptor in this dictionary, and the descriptors are marked as allowed to handle read events in the reactor, so they can be processed. When a descriptor is marked as not allowed to handle read events in the reactor (ie, it is passed to `IReactorFDSet.removeReader`), it is moved out of this dictionary and into `_closedAndNotReading`. The descriptors are keys in this dictionary. The values are arbitrary. (type: `dict`)
Instance Variable	_closedAndNotReading	These descriptors have had close notification delivered from the OS, but are not marked as allowed to handle read events in the reactor. They are saved here to record their closed state, but not processed at all. When one of these descriptors is passed to `IReactorFDSet.addReader`, it is moved out of this dictionary and into `_closedAndReading`. The descriptors are keys in this dictionary. The values are arbitrary. This is a weak key dictionary so that if an application tells the reactor to stop reading from a descriptor and then forgets about that descriptor itself, the reactor will also forget about it. (type: `WeakKeyDictionary`)
Method	_makeSocketEvent	Make a win32 event object for a socket.
Method	_runWrite	Undocumented
Method	_runAction	Undocumented

Inherited from PosixReactorBase:

Method	installWaker	Install a `waker' to allow threads and signals to wake up the IO thread.
Method	spawnProcess	Spawn a process, with a process protocol.
Method	listenUDP	Connects a given `DatagramProtocol` to the given numeric UDP port.
Method	listenMulticast	Connects a given DatagramProtocol to the given numeric UDP port.
Method	connectUNIX	Connect a client protocol to a UNIX socket.
Method	listenUNIX	Listen on a UNIX socket.
Method	listenUNIXDatagram	Connects a given `DatagramProtocol` to the given path.
Method	connectUNIXDatagram	Connects a `ConnectedDatagramProtocol` instance to a path.
Method	adoptStreamPort	Create a new `IListeningPort` from an already-initialized socket.
Method	adoptStreamConnection
Method	adoptDatagramPort	Add an existing listening SOCK_DGRAM socket to the reactor to monitor for read and write readiness.
Method	listenTCP	Connects a given protocol factory to the given numeric TCP/IP port.
Method	connectTCP	Connect a TCP client.
Method	connectSSL	Connect a client Protocol to a remote SSL socket.
Method	listenSSL	Connects a given protocol factory to the given numeric TCP/IP port. The connection is a SSL one, using contexts created by the context factory.
Instance Variable	_childWaker	`None` or a reference to the `_SIGCHLDWaker` which is used to properly notice child process termination.
Method	_handleSignals	Extend the basic signal handling logic to also support handling SIGCHLD to know when to try to reap child processes.
Method	_uninstallHandler	If a child waker was created and installed, uninstall it now.
Method	_removeAll	Remove all readers and writers, and list of removed `IReadDescriptor`s and `IWriteDescriptor`s.

Inherited from _SignalReactorMixin (via PosixReactorBase):

Method	startRunning	Extend the base implementation in order to remember whether signal handlers should be installed later.
Method	run	Undocumented
Method	mainLoop	Undocumented
Instance Variable	_installSignalHandlers	A flag which indicates whether any signal handlers will be installed during startup. This includes handlers for SIGCHLD to monitor child processes, and SIGINT, SIGTERM, and SIGBREAK to stop the reactor. (type: `bool`)
Method	_reallyStartRunning	Extend the base implementation by also installing signal handlers, if `self._installSignalHandlers` is true.

Inherited from _DisconnectSelectableMixin (via PosixReactorBase):

Method

_disconnectSelectable

Utility function for disconnecting a selectable.

Inherited from ReactorBase (via PosixReactorBase):

Instance Variable	running	See `IReactorCore.running`
Method	installResolver	See `IReactorPluggableResolver`.
Method	installNameResolver	See `IReactorPluggableNameResolver`.
Method	nameResolver	Implementation of read-only `IReactorPluggableNameResolver.nameResolver`.
Method	wakeUp	Wake up the event loop.
Method	doIteration	Do one iteration over the readers and writers which have been added.
Method	resolve	Return a Deferred that will resolve a hostname.
Method	stop	See twisted.internet.interfaces.IReactorCore.stop.
Method	crash	See twisted.internet.interfaces.IReactorCore.crash.
Method	sigInt	Handle a SIGINT interrupt.
Method	sigBreak	Handle a SIGBREAK interrupt.
Method	sigTerm	Handle a SIGTERM interrupt.
Method	disconnectAll	Disconnect every reader, and writer in the system.
Method	iterate	See twisted.internet.interfaces.IReactorCore.iterate.
Method	fireSystemEvent	See twisted.internet.interfaces.IReactorCore.fireSystemEvent.
Method	addSystemEventTrigger	See twisted.internet.interfaces.IReactorCore.addSystemEventTrigger.
Method	removeSystemEventTrigger	See twisted.internet.interfaces.IReactorCore.removeSystemEventTrigger.
Method	callWhenRunning	See twisted.internet.interfaces.IReactorCore.callWhenRunning.
Method	startRunning	Method called when reactor starts: do some initialization and fire startup events.
Method	callLater	See twisted.internet.interfaces.IReactorTime.callLater.
Method	getDelayedCalls	No summary
Method	timeout	Determine the longest time the reactor may sleep (waiting on I/O notification, perhaps) before it must wake up to service a time-related event.
Method	runUntilCurrent	Run all pending timed calls.
Method	callFromThread 0	See `twisted.internet.interfaces.IReactorFromThreads.callFromThread`.
Method	getThreadPool	See `twisted.internet.interfaces.IReactorThreads.getThreadPool`.
Method	callInThread	See `twisted.internet.interfaces.IReactorInThreads.callInThread`.
Method	suggestThreadPoolSize	See `twisted.internet.interfaces.IReactorThreads.suggestThreadPoolSize`.
Method	callFromThread	Cause a function to be executed by the reactor thread.
Instance Variable	_stopped	A flag which is true between paired calls to `reactor.run` and `reactor.stop`. This should be replaced with an explicit state machine. (type: `bool`)
Instance Variable	_justStopped	A flag which is true between the time `reactor.stop` is called and the time the shutdown system event is fired. This is used to determine whether that event should be fired after each iteration through the mainloop. This should be replaced with an explicit state machine. (type: `bool`)
Instance Variable	_started	A flag which is true from the time `reactor.run` is called until the time `reactor.run` returns. This is used to prevent calls to `reactor.run` on a running reactor. This should be replaced with an explicit state machine. (type: `bool`)
Instance Variable	_registerAsIOThread	A flag controlling whether the reactor will register the thread it is running in as the I/O thread when it starts. If `True`, registration will be done, otherwise it will not be.
Instance Variable	_exitSignal	See `_ISupportsExitSignalCapturing._exitSignal`
Method	_reallyStartRunning	Method called to transition to the running state. This should happen in the during startup event trigger phase.
Method	_moveCallLaterSooner	Undocumented
Method	_cancelCallLater	Undocumented
Method	_insertNewDelayedCalls	Undocumented
Method	_checkProcessArgs	Check for valid arguments and environment to spawnProcess.
Method	_initThreads	Undocumented
Method	_initThreadPool	Create the threadpool accessible with callFromThread.
Method	_stopThreadPool	No summary

_reads =

A dictionary mapping FileDescriptor instances to a win32 event object used to check for read events for that descriptor.

_writes =

A dictionary mapping FileDescriptor instances to a arbitrary value. Keys in this dictionary will be given a chance to write out their data.

_events =

A dictionary mapping win32 event object to tuples of FileDescriptor instances and event masks.

_closedAndReading =

Along with _closedAndNotReading, keeps track of descriptors which have had close notification delivered from the OS but which we have not finished reading data from. MsgWaitForMultipleObjects will only deliver close notification to us once, so we remember it in these two dictionaries until we're ready to act on it. The OS has delivered close notification for each descriptor in this dictionary, and the descriptors are marked as allowed to handle read events in the reactor, so they can be processed. When a descriptor is marked as not allowed to handle read events in the reactor (ie, it is passed to IReactorFDSet.removeReader), it is moved out of this dictionary and into _closedAndNotReading. The descriptors are keys in this dictionary. The values are arbitrary. (type: dict)

_closedAndNotReading =

These descriptors have had close notification delivered from the OS, but are not marked as allowed to handle read events in the reactor. They are saved here to record their closed state, but not processed at all. When one of these descriptors is passed to IReactorFDSet.addReader, it is moved out of this dictionary and into _closedAndReading. The descriptors are keys in this dictionary. The values are arbitrary. This is a weak key dictionary so that if an application tells the reactor to stop reading from a descriptor and then forgets about that descriptor itself, the reactor will also forget about it. (type: WeakKeyDictionary)

def __init__(self): (source)

overrides twisted.internet.base.ReactorBase.__init__

Undocumented

def _makeSocketEvent(self, fd, action, why): (source)

Make a win32 event object for a socket.

def addEvent(self, event, fd, action): (source)

from twisted.internet.interfaces.IReactorWin32Events

Add a new win32 event to the event loop.

def removeEvent(self, event): (source)

from twisted.internet.interfaces.IReactorWin32Events

Remove an event.

def addReader(self, reader): (source)