'
x = ''
def _run_finalizers(minpriority=None):
'''
Run all finalizers whose exit priority is not None and at least minpriority
Finalizers with highest priority are called first; finalizers with
the same priority will be called in reverse order of creation.
'''
if _finalizer_registry is None:
# This function may be called after this module's globals are
# destroyed. See the _exit_function function in this module for more
# notes.
return
if minpriority is None:
f = lambda p : p[0][0] is not None
else:
f = lambda p : p[0][0] is not None and p[0][0] >= minpriority
items = [x for x in _finalizer_registry.items() if f(x)]
items.sort(reverse=True)
for key, finalizer in items:
sub_debug('calling %s', finalizer)
try:
finalizer()
except Exception:
import traceback
traceback.print_exc()
if minpriority is None:
_finalizer_registry.clear()
#
# Clean up on exit
#
def is_exiting():
'''
Returns true if the process is shutting down
'''
return _exiting or _exiting is None
_exiting = False
def _exit_function(info=info, debug=debug, _run_finalizers=_run_finalizers,
active_children=active_children,
current_process=current_process):
# NB: we hold on to references to functions in the arglist due to the
# situation described below, where this function is called after this
# module's globals are destroyed.
global _exiting
info('process shutting down')
debug('running all "atexit" finalizers with priority >= 0')
_run_finalizers(0)
if current_process() is not None:
# NB: we check if the current process is None here because if
# it's None, any call to ``active_children()`` will throw an
# AttributeError (active_children winds up trying to get
# attributes from util._current_process). This happens in a
# variety of shutdown circumstances that are not well-understood
# because module-scope variables are not apparently supposed to
# be destroyed until after this function is called. However,
# they are indeed destroyed before this function is called. See
# issues 9775 and 15881. Also related: 4106, 9205, and 9207.
for p in active_children():
if p._daemonic:
info('calling terminate() for daemon %s', p.name)
p._popen.terminate()
for p in active_children():
info('calling join() for process %s', p.name)
p.join()
debug('running the remaining "atexit" finalizers')
_run_finalizers()
atexit.register(_exit_function)
#
# Some fork aware types
#
class ForkAwareThreadLock(object):
def __init__(self):
self._reset()
register_after_fork(self, ForkAwareThreadLock._reset)
def _reset(self):
self._lock = threading.Lock()
self.acquire = self._lock.acquire
self.release = self._lock.release
class ForkAwareLocal(threading.local):
def __init__(self):
register_after_fork(self, lambda obj : obj.__dict__.clear())
def __reduce__(self):
return type(self), ()