Part of twisted.internet._glibbase View Source View In Hierarchy
Known subclasses: twisted.internet.gireactor.GIReactor, twisted.internet.gtk2reactor.Gtk2Reactor
Notification for I/O events (reads and writes on file descriptors) is done by the 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 FileDescriptor s. |
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 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 | Undocumented |
Method | connectTCP | Undocumented |
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 | _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 | 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 | Undocumented |
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 | 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.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. |
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. |
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 |
Inherited from _PollLikeMixin:
Method | _doReadOrWrite | fd is available for read or write, do the work and raise errors if necessary. |
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.FileDescriptor
for monitoring of data available to read.FileDescriptor
for monitoring ability to write data.FileDescriptor
for either reading or writing. If it's still monitored for the other
operation, we re-register the FileDescriptor
for only that operation.FileDescriptor
for reading.FileDescriptor
for writing.This is not used for actual reactor runs.