|
|
import sys
|
|
|
|
|
|
from twisted.internet import gtk2reactor
|
|
|
gtk2reactor.install()
|
|
|
|
|
|
from twisted.internet import reactor, threads
|
|
|
|
|
|
""" change here to choose the plot shell with the MT option
|
|
|
which should cost extra """
|
|
|
|
|
|
from IPython.ipmaker import make_IPython
|
|
|
from IPython.iplib import InteractiveShell
|
|
|
from IPython.ipstruct import Struct
|
|
|
import Queue,thread,threading,signal
|
|
|
from signal import signal, SIGINT
|
|
|
from IPython.genutils import Term,warn,error,flag_calls, ask_yes_no
|
|
|
import shellglobals
|
|
|
|
|
|
|
|
|
def hijack_reactor():
|
|
|
"""Modifies Twisted's reactor with a dummy so user code does
|
|
|
not block IPython. This function returns the original
|
|
|
'twisted.internet.reactor' that has been hijacked.
|
|
|
|
|
|
NOTE: Make sure you call this *AFTER* you've installed
|
|
|
the reactor of your choice.
|
|
|
"""
|
|
|
from twisted import internet
|
|
|
orig_reactor = internet.reactor
|
|
|
|
|
|
class DummyReactor(object):
|
|
|
def run(self):
|
|
|
pass
|
|
|
def __getattr__(self, name):
|
|
|
return getattr(orig_reactor, name)
|
|
|
def __setattr__(self, name, value):
|
|
|
return setattr(orig_reactor, name, value)
|
|
|
|
|
|
internet.reactor = DummyReactor()
|
|
|
return orig_reactor
|
|
|
|
|
|
class TwistedInteractiveShell(InteractiveShell):
|
|
|
"""Simple multi-threaded shell."""
|
|
|
|
|
|
# Threading strategy taken from:
|
|
|
# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65109, by Brian
|
|
|
# McErlean and John Finlay. Modified with corrections by Antoon Pardon,
|
|
|
# from the pygtk mailing list, to avoid lockups with system calls.
|
|
|
|
|
|
# class attribute to indicate whether the class supports threads or not.
|
|
|
# Subclasses with thread support should override this as needed.
|
|
|
isthreaded = True
|
|
|
|
|
|
def __init__(self,name,usage=None,rc=Struct(opts=None,args=None),
|
|
|
user_ns=None,user_global_ns=None,banner2='',**kw):
|
|
|
"""Similar to the normal InteractiveShell, but with threading control"""
|
|
|
|
|
|
InteractiveShell.__init__(self,name,usage,rc,user_ns,
|
|
|
user_global_ns,banner2)
|
|
|
|
|
|
|
|
|
# A queue to hold the code to be executed.
|
|
|
self.code_queue = Queue.Queue()
|
|
|
|
|
|
# Stuff to do at closing time
|
|
|
self._kill = None
|
|
|
on_kill = kw.get('on_kill', [])
|
|
|
# Check that all things to kill are callable:
|
|
|
for t in on_kill:
|
|
|
if not callable(t):
|
|
|
raise TypeError,'on_kill must be a list of callables'
|
|
|
self.on_kill = on_kill
|
|
|
# thread identity of the "worker thread" (that may execute code directly)
|
|
|
self.worker_ident = None
|
|
|
self.reactor_started = False
|
|
|
self.first_run = True
|
|
|
|
|
|
def runsource(self, source, filename="<input>", symbol="single"):
|
|
|
"""Compile and run some source in the interpreter.
|
|
|
|
|
|
Modified version of code.py's runsource(), to handle threading issues.
|
|
|
See the original for full docstring details."""
|
|
|
|
|
|
# If Ctrl-C was typed, we reset the flag and return right away
|
|
|
if shellglobals.KBINT:
|
|
|
shellglobals.KBINT = False
|
|
|
return False
|
|
|
|
|
|
if self._kill:
|
|
|
# can't queue new code if we are being killed
|
|
|
return True
|
|
|
|
|
|
try:
|
|
|
code = self.compile(source, filename, symbol)
|
|
|
except (OverflowError, SyntaxError, ValueError):
|
|
|
# Case 1
|
|
|
self.showsyntaxerror(filename)
|
|
|
return False
|
|
|
|
|
|
if code is None:
|
|
|
# Case 2
|
|
|
return True
|
|
|
|
|
|
# shortcut - if we are in worker thread, or the worker thread is not running,
|
|
|
# execute directly (to allow recursion and prevent deadlock if code is run early
|
|
|
# in IPython construction)
|
|
|
|
|
|
if (not self.reactor_started or (self.worker_ident is None and not self.first_run)
|
|
|
or self.worker_ident == thread.get_ident()):
|
|
|
InteractiveShell.runcode(self,code)
|
|
|
return
|
|
|
|
|
|
# Case 3
|
|
|
# Store code in queue, so the execution thread can handle it.
|
|
|
|
|
|
self.first_run = False
|
|
|
completed_ev, received_ev = threading.Event(), threading.Event()
|
|
|
|
|
|
self.code_queue.put((code,completed_ev, received_ev))
|
|
|
|
|
|
reactor.callLater(0.0,self.runcode)
|
|
|
received_ev.wait(5)
|
|
|
if not received_ev.isSet():
|
|
|
# the mainloop is dead, start executing code directly
|
|
|
print "Warning: Timeout for mainloop thread exceeded"
|
|
|
print "switching to nonthreaded mode (until mainloop wakes up again)"
|
|
|
self.worker_ident = None
|
|
|
else:
|
|
|
shellglobals.CURRENT_COMPLETE_EV = completed_ev
|
|
|
completed_ev.wait()
|
|
|
|
|
|
return False
|
|
|
|
|
|
def runcode(self):
|
|
|
"""Execute a code object.
|
|
|
|
|
|
Multithreaded wrapper around IPython's runcode()."""
|
|
|
|
|
|
|
|
|
# we are in worker thread, stash out the id for runsource()
|
|
|
self.worker_ident = thread.get_ident()
|
|
|
|
|
|
if self._kill:
|
|
|
print >>Term.cout, 'Closing threads...',
|
|
|
Term.cout.flush()
|
|
|
for tokill in self.on_kill:
|
|
|
tokill()
|
|
|
print >>Term.cout, 'Done.'
|
|
|
# allow kill() to return
|
|
|
self._kill.set()
|
|
|
return True
|
|
|
|
|
|
# Install SIGINT handler. We do it every time to ensure that if user
|
|
|
# code modifies it, we restore our own handling.
|
|
|
try:
|
|
|
pass
|
|
|
signal(SIGINT,shellglobals.sigint_handler)
|
|
|
except SystemError:
|
|
|
# This happens under Windows, which seems to have all sorts
|
|
|
# of problems with signal handling. Oh well...
|
|
|
pass
|
|
|
|
|
|
# Flush queue of pending code by calling the run methood of the parent
|
|
|
# class with all items which may be in the queue.
|
|
|
code_to_run = None
|
|
|
while 1:
|
|
|
try:
|
|
|
code_to_run, completed_ev, received_ev = self.code_queue.get_nowait()
|
|
|
except Queue.Empty:
|
|
|
break
|
|
|
received_ev.set()
|
|
|
|
|
|
|
|
|
# Exceptions need to be raised differently depending on which
|
|
|
# thread is active. This convoluted try/except is only there to
|
|
|
# protect against asynchronous exceptions, to ensure that a shellglobals.KBINT
|
|
|
# at the wrong time doesn't deadlock everything. The global
|
|
|
# CODE_TO_RUN is set to true/false as close as possible to the
|
|
|
# runcode() call, so that the KBINT handler is correctly informed.
|
|
|
try:
|
|
|
try:
|
|
|
shellglobals.CODE_RUN = True
|
|
|
InteractiveShell.runcode(self,code_to_run)
|
|
|
except KeyboardInterrupt:
|
|
|
print "Keyboard interrupted in mainloop"
|
|
|
while not self.code_queue.empty():
|
|
|
code = self.code_queue.get_nowait()
|
|
|
break
|
|
|
finally:
|
|
|
shellglobals.CODE_RUN = False
|
|
|
# allow runsource() return from wait
|
|
|
completed_ev.set()
|
|
|
|
|
|
# This MUST return true for gtk threading to work
|
|
|
return True
|
|
|
|
|
|
def kill(self):
|
|
|
"""Kill the thread, returning when it has been shut down."""
|
|
|
self._kill = threading.Event()
|
|
|
reactor.callLater(0.0,self.runcode)
|
|
|
self._kill.wait()
|
|
|
|
|
|
|
|
|
|
|
|
class IPShellTwisted():
|
|
|
"""Run a Twisted reactor while in an IPython session.
|
|
|
|
|
|
Python commands can be passed to the thread where they will be
|
|
|
executed. This is implemented by periodically checking for
|
|
|
passed code using a Twisted reactor callback.
|
|
|
"""
|
|
|
|
|
|
TIMEOUT = 0.01 # Millisecond interval between reactor runs.
|
|
|
|
|
|
def __init__(self, argv=None, user_ns=None, debug=1,
|
|
|
shell_class=TwistedInteractiveShell):
|
|
|
|
|
|
from twisted.internet import reactor
|
|
|
self.reactor = hijack_reactor()
|
|
|
|
|
|
mainquit = self.reactor.stop
|
|
|
|
|
|
# Make sure IPython keeps going after reactor stop.
|
|
|
def reactorstop():
|
|
|
pass
|
|
|
self.reactor.stop = reactorstop
|
|
|
reactorrun_orig = self.reactor.run
|
|
|
self.quitting = False
|
|
|
def reactorrun():
|
|
|
while True and not self.quitting:
|
|
|
reactorrun_orig()
|
|
|
self.reactor.run = reactorrun
|
|
|
|
|
|
self.IP = make_IPython(argv, user_ns=user_ns, debug=debug,
|
|
|
shell_class=shell_class,
|
|
|
on_kill=[mainquit])
|
|
|
|
|
|
# threading.Thread.__init__(self)
|
|
|
|
|
|
def run(self):
|
|
|
self.IP.mainloop()
|
|
|
self.quitting = True
|
|
|
self.IP.kill()
|
|
|
|
|
|
def mainloop(self):
|
|
|
def mainLoopThreadDeath(r):
|
|
|
print "mainLoopThreadDeath: ", str(r)
|
|
|
def spawnMainloopThread():
|
|
|
d=threads.deferToThread(self.run)
|
|
|
d.addBoth(mainLoopThreadDeath)
|
|
|
reactor.callWhenRunning(spawnMainloopThread)
|
|
|
self.IP.reactor_started = True
|
|
|
self.reactor.run()
|
|
|
print "mainloop ending...."
|
|
|
|
|
|
exists = True
|
|
|
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
# Sample usage.
|
|
|
|
|
|
# Create the shell object. This steals twisted.internet.reactor
|
|
|
# for its own purposes, to make sure you've already installed a
|
|
|
# reactor of your choice.
|
|
|
shell = IPShellTwisted(
|
|
|
argv=[],
|
|
|
user_ns={'__name__': '__example__',
|
|
|
'hello': 'world',
|
|
|
},
|
|
|
)
|
|
|
|
|
|
# Run the mainloop. This runs the actual reactor.run() method.
|
|
|
# The twisted.internet.reactor object at this point is a dummy
|
|
|
# object that passes through to the actual reactor, but prevents
|
|
|
# run() from being called on it again.
|
|
|
shell.mainloop()
|
|
|
|
|
|
# You must exit IPython to terminate your program.
|
|
|
print 'Goodbye!'
|
|
|
|
|
|
|
