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()
or shellglobals.run_in_frontend(source)):
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:
completed_ev.wait()
return False
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() or shellglobals.run_in_frontend(source)):
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:
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 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
