def _run_exitfuncs():
"""run any registered exit functions
_exithandlers is traversed in reverse order so functions are executed
last in, first out.
"""
exc_info = None
while _exithandlers:
func, targs, kargs = _exithandlers.pop()
try:
func(*targs, **kargs)
except SystemExit:
exc_info = sys.exc_info()
except:
import traceback
sys.stderr.write("Error in atexit._run_exitfuncs:\n")
traceback.print_exc()
exc_info = sys.exc_info()
if exc_info is not None:
raise exc_info[0](exc_info[1])
python类_run_exitfuncs()的实例源码
def _run_exitfuncs():
"""run any registered exit functions
_exithandlers is traversed in reverse order so functions are executed
last in, first out.
"""
exc_info = None
while _exithandlers:
func, targs, kargs = _exithandlers.pop()
try:
func(*targs, **kargs)
except SystemExit:
exc_info = sys.exc_info()
except:
import traceback
sys.stderr.write("Error in atexit._run_exitfuncs:\n")
traceback.print_exc()
exc_info = sys.exc_info()
if exc_info is not None:
raise exc_info[0](exc_info[1])
def exit():
"""
Causes python to exit without garbage-collecting any objects, and thus avoids
calling object destructor methods. This is a sledgehammer workaround for
a variety of bugs in PyQt and Pyside that cause crashes on exit.
This function does the following in an attempt to 'safely' terminate
the process:
* Invoke atexit callbacks
* Close all open file handles
* os._exit()
Note: there is some potential for causing damage with this function if you
are using objects that _require_ their destructors to be called (for example,
to properly terminate log files, disconnect from devices, etc). Situations
like this are probably quite rare, but use at your own risk.
"""
## first disable our own cleanup function; won't be needing it.
setConfigOptions(exitCleanup=False)
## invoke atexit callbacks
atexit._run_exitfuncs()
## close file handles
if sys.platform == 'darwin':
for fd in range(3, 4096):
if fd not in [7]: # trying to close 7 produces an illegal instruction on the Mac.
os.close(fd)
else:
os.closerange(3, 4096) ## just guessing on the maximum descriptor count..
os._exit(0)
## Convenience functions for command-line use
def exit():
"""
Causes python to exit without garbage-collecting any objects, and thus avoids
calling object destructor methods. This is a sledgehammer workaround for
a variety of bugs in PyQt and Pyside that cause crashes on exit.
This function does the following in an attempt to 'safely' terminate
the process:
* Invoke atexit callbacks
* Close all open file handles
* os._exit()
Note: there is some potential for causing damage with this function if you
are using objects that _require_ their destructors to be called (for example,
to properly terminate log files, disconnect from devices, etc). Situations
like this are probably quite rare, but use at your own risk.
"""
## first disable our own cleanup function; won't be needing it.
setConfigOptions(exitCleanup=False)
## invoke atexit callbacks
atexit._run_exitfuncs()
## close file handles
if sys.platform == 'darwin':
for fd in range(3, 4096):
if fd not in [7]: # trying to close 7 produces an illegal instruction on the Mac.
os.close(fd)
else:
os.closerange(3, 4096) ## just guessing on the maximum descriptor count..
os._exit(0)
## Convenience functions for command-line use
def test_args(self):
# be sure args are handled properly
atexit.register(h1)
atexit.register(h4)
atexit.register(h4, 4, kw="abc")
atexit._run_exitfuncs()
self.assertEqual(self.stream.getvalue(),
"h4 (4,) {'kw': 'abc'}\nh4 () {}\nh1\n")
def test_badargs(self):
atexit.register(lambda: 1, 0, 0, (x for x in (1,2)), 0, 0)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_order(self):
# be sure handlers are executed in reverse order
atexit.register(h1)
atexit.register(h2)
atexit.register(h3)
atexit._run_exitfuncs()
self.assertEqual(self.stream.getvalue(), "h3\nh2\nh1\n")
def test_raise(self):
# be sure raises are handled properly
atexit.register(raise1)
atexit.register(raise2)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_raise_unnormalized(self):
# Issue #10756: Make sure that an unnormalized exception is
# handled properly
atexit.register(lambda: 1 / 0)
self.assertRaises(ZeroDivisionError, atexit._run_exitfuncs)
self.assertIn("ZeroDivisionError", self.stream.getvalue())
def test_clear(self):
a = [0]
def inc():
a[0] += 1
atexit.register(inc)
atexit._clear()
atexit._run_exitfuncs()
self.assertEqual(a[0], 0)
def test_unregister(self):
a = [0]
def inc():
a[0] += 1
def dec():
a[0] -= 1
for i in range(4):
atexit.register(inc)
atexit.register(dec)
atexit.unregister(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], -1)
def test_bound_methods(self):
l = []
atexit.register(l.append, 5)
atexit._run_exitfuncs()
self.assertEqual(l, [5])
atexit.unregister(l.append)
atexit._run_exitfuncs()
self.assertEqual(l, [5])
def test_args(self):
atexit.register(self.h1)
atexit.register(self.h4)
atexit.register(self.h4, 4, kw="abc")
atexit._run_exitfuncs()
self.assertEqual(self.subst_io.getvalue(),
"h4 (4,) {'kw': 'abc'}\nh4 () {}\nh1\n")
def test_badargs(self):
atexit.register(lambda: 1, 0, 0, (x for x in (1,2)), 0, 0)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_order(self):
atexit.register(self.h1)
atexit.register(self.h2)
atexit.register(self.h3)
atexit._run_exitfuncs()
self.assertEqual(self.subst_io.getvalue(), "h3\nh2\nh1\n")
def test_sys_override(self):
# be sure a preset sys.exitfunc is handled properly
exfunc = sys.exitfunc
sys.exitfunc = self.h1
reload(atexit)
try:
atexit.register(self.h2)
atexit._run_exitfuncs()
finally:
sys.exitfunc = exfunc
self.assertEqual(self.subst_io.getvalue(), "h2\nh1\n")
def test_raise(self):
atexit.register(self.raise1)
atexit.register(self.raise2)
self.assertRaises(TypeError, atexit._run_exitfuncs)
### helpers
def test_args(self):
atexit.register(self.h1)
atexit.register(self.h4)
atexit.register(self.h4, 4, kw="abc")
atexit._run_exitfuncs()
self.assertEqual(self.subst_io.getvalue(),
"h4 (4,) {'kw': 'abc'}\nh4 () {}\nh1\n")
def test_badargs(self):
atexit.register(lambda: 1, 0, 0, (x for x in (1,2)), 0, 0)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_order(self):
atexit.register(self.h1)
atexit.register(self.h2)
atexit.register(self.h3)
atexit._run_exitfuncs()
self.assertEqual(self.subst_io.getvalue(), "h3\nh2\nh1\n")
def test_sys_override(self):
# be sure a preset sys.exitfunc is handled properly
exfunc = sys.exitfunc
sys.exitfunc = self.h1
reload(atexit)
try:
atexit.register(self.h2)
atexit._run_exitfuncs()
finally:
sys.exitfunc = exfunc
self.assertEqual(self.subst_io.getvalue(), "h2\nh1\n")
def test_raise(self):
atexit.register(self.raise1)
atexit.register(self.raise2)
self.assertRaises(TypeError, atexit._run_exitfuncs)
### helpers
def test_args(self):
# be sure args are handled properly
atexit.register(h1)
atexit.register(h4)
atexit.register(h4, 4, kw="abc")
atexit._run_exitfuncs()
self.assertEqual(self.stream.getvalue(),
"h4 (4,) {'kw': 'abc'}\nh4 () {}\nh1\n")
def test_badargs(self):
atexit.register(lambda: 1, 0, 0, (x for x in (1,2)), 0, 0)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_order(self):
# be sure handlers are executed in reverse order
atexit.register(h1)
atexit.register(h2)
atexit.register(h3)
atexit._run_exitfuncs()
self.assertEqual(self.stream.getvalue(), "h3\nh2\nh1\n")
def test_raise(self):
# be sure raises are handled properly
atexit.register(raise1)
atexit.register(raise2)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_raise_unnormalized(self):
# Issue #10756: Make sure that an unnormalized exception is
# handled properly
atexit.register(lambda: 1 / 0)
self.assertRaises(ZeroDivisionError, atexit._run_exitfuncs)
self.assertIn("ZeroDivisionError", self.stream.getvalue())
def test_stress(self):
a = [0]
def inc():
a[0] += 1
for i in range(128):
atexit.register(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], 128)
def test_clear(self):
a = [0]
def inc():
a[0] += 1
atexit.register(inc)
atexit._clear()
atexit._run_exitfuncs()
self.assertEqual(a[0], 0)
def test_unregister(self):
a = [0]
def inc():
a[0] += 1
def dec():
a[0] -= 1
for i in range(4):
atexit.register(inc)
atexit.register(dec)
atexit.unregister(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], -1)
