Viewing file:  threaded_import_hangers.py (1.45 KB) -rw-r--r--
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# This is a helper module for test_threaded_import. The test imports this
# module, and this module tries to run various Python library functions in
# their own thread, as a side effect of being imported. If the spawned
# thread doesn't complete in TIMEOUT seconds, an "appeared to hang" message
# is appended to the module-global `errors` list. That list remains empty
# if (and only if) all functions tested complete.
TIMEOUT = 10
import threading
import tempfile
import os.path
errors = []
# This class merely runs a function in its own thread T. The thread importing
# this module holds the import lock, so if the function called by T tries
# to do its own imports it will block waiting for this module's import
# to complete.
class Worker(threading.Thread):
def __init__(self, function, args):
threading.Thread.__init__(self)
self.function = function
self.args = args
def run(self):
self.function(*self.args)
for name, func, args in [
# Bug 147376: TemporaryFile hung on Windows, starting in Python 2.4.
("tempfile.TemporaryFile", lambda: tempfile.TemporaryFile().close(), ()),
# The real cause for bug 147376: ntpath.abspath() caused the hang.
("os.path.abspath", os.path.abspath, ('.',)),
]:
try:
t = Worker(func, args)
t.start()
t.join(TIMEOUT)
if t.is_alive():
errors.append("%s appeared to hang" % name)
finally:
del t
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