twisted.internet.cfreactor.CFReactor : API documentation

The CoreFoundation reactor.

You probably want to use this via the install API.

Instance Variables	_fdmap	a dictionary, mapping an integer (a file descriptor) to a 4-tuple of: source: a `CFRunLoopSource`; the source associated with this socket. socket: a `CFSocket` wrapping the file descriptor. descriptor: an `IReadDescriptor` and/or `IWriteDescriptor` provider. read-write: a 2-`list` of booleans: respectively, whether this descriptor is currently registered for reading or registered for writing.
	_idmap	a dictionary, mapping the id() of an `IReadDescriptor` or `IWriteDescriptor` to a `fd` in `_fdmap`. Implemented in this manner so that we don't have to rely (even more) on the hashability of `IReadDescriptor` providers, and we know that they won't be collected since these are kept in sync with `_fdmap`. Necessary because the .fileno() of a file descriptor may change at will, so we need to be able to look up what its file descriptor used to be, so that we can look it up in `_fdmap`
	_cfrunloop	the `CFRunLoop` pyobjc object wrapped by this reactor.
	_inCFLoop	Is `CFRunLoopRun` currently running? (type: `bool` )
	_currentSimulator	if a CFTimer is currently scheduled with the CF run loop to run Twisted callLater calls, this is a reference to it. Otherwise, it is `None`

Method	__init__	Undocumented
Method	installWaker	Override `installWaker` in order to use `_WakerPlus`; otherwise this should be exactly the same as the parent implementation.
Method	addReader	Implement `IReactorFDSet.addReader`.
Method	addWriter	Implement `IReactorFDSet.addWriter`.
Method	removeReader	Implement `IReactorFDSet.removeReader`.
Method	removeWriter	Implement `IReactorFDSet.removeWriter`.
Method	removeAll	Implement `IReactorFDSet.removeAll`.
Method	getReaders	Implement `IReactorFDSet.getReaders`.
Method	getWriters	Implement `IReactorFDSet.getWriters`.
Method	mainLoop	Run the runner (`CFRunLoopRun` or something that calls it), which runs the run loop until `crash()` is called.
Method	callLater	Implement `IReactorTime.callLater`.
Method	stop	Implement `IReactorCore.stop`.
Method	crash	Implement `IReactorCore.crash`
Method	iterate	Emulate the behavior of `iterate()` for things that want to call it, by letting the loop run for a little while and then scheduling a timed call to exit it.
Method	_socketCallback	The socket callback issued by CFRunLoop. This will issue `doRead` or `doWrite` calls to the `IReadDescriptor` and `IWriteDescriptor` registered with the file descriptor that we are being notified of.
Method	_watchFD	Register a file descriptor with the `CFRunLoop`, or modify its state so that it's listening for both notifications (read and write) rather than just one; used to implement `addReader` and `addWriter`.
Method	_flag2idx	Convert a `kCFSocket...` constant to an index into the read/write state list (`_READ` or `_WRITE`) (the 4th element of the value of `self._fdmap`).
Method	_unwatchFD	Unregister a file descriptor with the `CFRunLoop`, or modify its state so that it's listening for only one notification (read or write) as opposed to both; used to implement `removeReader` and `removeWriter`.
Method	_moveCallLaterSooner	No summary
Method	_scheduleSimulate	Schedule a call to `self.runUntilCurrent`. This will cancel the currently scheduled call if it is already scheduled.
Method	_stopNow	Immediately stop the CFRunLoop (which must be running!).

Inherited from PosixReactorBase:

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
Method	listenUNIX
Method	listenUNIXDatagram	Connects a given `DatagramProtocol` to the given path.
Method	connectUNIXDatagram	Connects a `ConnectedDatagramProtocol` instance to a path.
Method	listenTCP
Method	connectTCP
Method	connectSSL
Method	listenSSL
Method	listenWith	Undocumented
Method	connectWith	Undocumented
Method	_disconnectSelectable	Utility function for disconnecting a selectable.
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	_reallyStartRunning	Extend the base implementation by also installing signal handlers, if `self._installSignalHandlers` is true.

Inherited from ReactorBase (via PosixReactorBase):

Method	installResolver	Set the internal resolver to use to for name lookups.
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	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	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	getDelayedCalls	No summary
Method	timeout	Undocumented
Method	runUntilCurrent	Run all pending timed calls.
Method	callFromThread 0	See `twisted.internet.interfaces.IReactorThreads.callFromThread`.
Method	getThreadPool	See `twisted.internet.interfaces.IReactorThreads.getThreadPool`.
Method	callInThread	See `twisted.internet.interfaces.IReactorThreads.callInThread`.
Method	suggestThreadPoolSize	See `twisted.internet.interfaces.IReactorThreads.suggestThreadPoolSize`.
Method	callFromThread	Cause a function to be executed by the reactor thread.
Method	_reallyStartRunning	Method called to transition to the running state. This should happen in the during startup event trigger phase.
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

Override installWaker in order to use _WakerPlus; otherwise this should be exactly the same as the parent implementation.

The socket callback issued by CFRunLoop. This will issue doRead or doWrite calls to the IReadDescriptor and IWriteDescriptor registered with the file descriptor that we are being notified of.

Parameters	cfSocket	The `CFSocket` which has got some activity.
	callbackType	The type of activity that we are being notified of. Either `kCFSocketReadCallBack` or `kCFSocketWriteCallBack`.
	ignoredAddress	Unused, because this is not used for either of the callback types we register for.
	ignoredData	Unused, because this is not used for either of the callback types we register for.
	context	The data associated with this callback by `CFSocketCreateWithNative` (in `CFReactor._watchFD`). A 2-tuple of `(int, CFRunLoopSource)`.

Register a file descriptor with the CFRunLoop, or modify its state so that it's listening for both notifications (read and write) rather than just one; used to implement addReader and addWriter.

Parameters	fd	The file descriptor. (type: `int` )
	descr	the `IReadDescriptor` or `IWriteDescriptor`
	flag	the flag to register for callbacks on, either `kCFSocketReadCallBack` or `kCFSocketWriteCallBack`

Convert a kCFSocket... constant to an index into the read/write state list (_READ or _WRITE) (the 4th element of the value of self._fdmap).

Parameters	flag	`kCFSocketReadCallBack` or `kCFSocketWriteCallBack`
Returns	`_READ` or `_WRITE`

Unregister a file descriptor with the CFRunLoop, or modify its state so that it's listening for only one notification (read or write) as opposed to both; used to implement removeReader and removeWriter.

Parameters	fd	a file descriptor (type: `int` )
	descr	an `IReadDescriptor` or `IWriteDescriptor`
	flag	`kCFSocketWriteCallBack` `kCFSocketReadCallBack`

Override PosixReactorBase's implementation of IDelayedCall.reset so that it will immediately reschedule. Normally _moveCallLaterSooner depends on the fact that runUntilCurrent is always run before the mainloop goes back to sleep, so this forces it to immediately recompute how long the loop needs to stay asleep.

Run the runner (CFRunLoopRun or something that calls it), which runs the run loop until crash() is called.

Schedule a call to self.runUntilCurrent. This will cancel the currently scheduled call if it is already scheduled.

Parameters force Even if there are no timed calls, make sure that runUntilCurrent runs immediately (in a 0-seconds-from-now {CFRunLoopTimer}). This is necessary for calls which need to trigger behavior of runUntilCurrent other than running timed calls, such as draining the thread call queue or calling crash() when the appropriate flags are set. (type: bool )

Immediately stop the CFRunLoop (which must be running!).

Emulate the behavior of iterate() for things that want to call it, by letting the loop run for a little while and then scheduling a timed call to exit it.

t.i.c.CFReactor(PosixReactorBase) : class documentation