Known subclasses: twisted.internet.gireactor.GIReactor, twisted.internet.gtk2reactor.Gtk2Reactor

Implements interfaces: twisted.internet.interfaces.IReactorFDSet

Base class for GObject event loop reactors.

Notification for I/O events (reads and writes on file descriptors) is done by the gobject-based event loop. File descriptors are registered with gobject with the appropriate flags for read/write/disconnect notification.

Time-based events, the results of callLater and callFromThread, are handled differently. Rather than registering each event with gobject, a single gobject timeout is registered for the earliest scheduled event, the output of reactor.timeout(). For example, if there are timeouts in 1, 2 and 3.4 seconds, a single timeout is registered for 1 second in the future. When this timeout is hit, _simulate is called, which calls the appropriate Twisted-level handlers, and a new timeout is added to gobject by the _reschedule method.

To handle callFromThread events, we use a custom waker that calls _simulate whenever it wakes up.

Method __init__ Undocumented
Method input_add Undocumented
Method addReader Add a FileDescriptor for monitoring of data available to read.
Method addWriter Add a FileDescriptor for monitoring ability to write data.
Method getReaders Retrieve the list of current FileDescriptor monitored for reading.
Method getWriters Retrieve the list of current FileDescriptor monitored for writing.
Method removeAll Remove monitoring for all registered FileDescriptors.
Method removeReader Stop monitoring the given FileDescriptor for reading.
Method removeWriter Stop monitoring the given FileDescriptor for writing.
Method iterate One iteration of the event loop, for trial's use.
Method crash Crash the reactor.
Method stop Stop the reactor.
Method run Run the reactor.
Method callLater Schedule a DelayedCall.
Instance Variable _sources A dictionary mapping FileDescriptor instances to GSource handles.
Instance Variable _reads A set of FileDescriptor instances currently monitored for reading.
Instance Variable _writes A set of FileDescriptor instances currently monitored for writing.
Instance Variable _simtag A GSource handle for the next simulate call.
Method _handleSignals Extend the basic signal handling logic to also support handling SIGCHLD to know when to try to reap child processes.
Method _ioEventCallback Called by event loop when an I/O event occurs.
Method _add No summary
Method _remove Remove monitoring the given FileDescriptor for either reading or writing. If it's still monitored for the other operation, we re-register the FileDescriptor for only that operation.
Method _reschedule Schedule a glib timeout for _simulate.
Method _simulate Run timers, and then reschedule glib timeout for next scheduled event.

Inherited from _PollLikeMixin:

Method _doReadOrWrite fd is available for read or write, do the work and raise errors if necessary.

Inherited from _PollLikeMixin:

Method _doReadOrWrite fd is available for read or write, do the work and raise errors if necessary.

Inherited from _PollLikeMixin:

Method _doReadOrWrite fd is available for read or write, do the work and raise errors if necessary.

Inherited from _PollLikeMixin:

Method _doReadOrWrite fd is available for read or write, do the work and raise errors if necessary.

Inherited from _PollLikeMixin:

Method _doReadOrWrite fd is available for read or write, do the work and raise errors if necessary.
_sources =
A dictionary mapping FileDescriptor instances to GSource handles.
_reads =
A set of FileDescriptor instances currently monitored for reading.
_writes =
A set of FileDescriptor instances currently monitored for writing.
_simtag =
A GSource handle for the next simulate call.
def __init__(self, glib_module, gtk_module, useGtk=False): (source)
def _handleSignals(self): (source)

Extend the basic signal handling logic to also support handling SIGCHLD to know when to try to reap child processes.

def input_add(self, source, condition, callback): (source)
Undocumented
def _ioEventCallback(self, source, condition): (source)

Called by event loop when an I/O event occurs.

def _add(self, source, primary, other, primaryFlag, otherFlag): (source)

Add the given FileDescriptor for monitoring either for reading or writing. If the file is already monitored for the other operation, we delete the previous registration and re-register it for both reading and writing.

def addReader(self, reader): (source)

Add a FileDescriptor for monitoring of data available to read.

def addWriter(self, writer): (source)
def getReaders(self): (source)

Retrieve the list of current FileDescriptor monitored for reading.

def getWriters(self): (source)

Retrieve the list of current FileDescriptor monitored for writing.

def removeAll(self): (source)
def _remove(self, source, primary, other, flags): (source)

Remove monitoring the given FileDescriptor for either reading or writing. If it's still monitored for the other operation, we re-register the FileDescriptor for only that operation.

def removeReader(self, reader): (source)
def removeWriter(self, writer): (source)
def iterate(self, delay=0): (source)

One iteration of the event loop, for trial's use.

This is not used for actual reactor runs.

def run(self, installSignalHandlers=True): (source)
def callLater(self, *args, **kwargs): (source)
def _reschedule(self): (source)

Schedule a glib timeout for _simulate.

def _simulate(self): (source)

Run timers, and then reschedule glib timeout for next scheduled event.

API Documentation for Twisted, generated by pydoctor at 2017-06-11 10:59:01.