1 # This is a helper module for test_threaded_import.  The test imports this

     2 # module, and this module tries to run various Python library functions in

     3 # their own thread, as a side effect of being imported.  If the spawned

     4 # thread doesn't complete in TIMEOUT seconds, an "appeared to hang" message

     5 # is appended to the module-global `errors` list.  That list remains empty

     6 # if (and only if) all functions tested complete.

     7 

     8 TIMEOUT = 10

     9 

    10 import threading

    11 

    12 import tempfile

    13 import os.path

    14 

    15 errors = []

    16 

    17 # This class merely runs a function in its own thread T.  The thread importing

    18 # this module holds the import lock, so if the function called by T tries

    19 # to do its own imports it will block waiting for this module's import

    20 # to complete.

    21 class Worker(threading.Thread):

    22     def __init__(self, function, args):

    23         threading.Thread.__init__(self)

    24         self.function = function

    25         self.args = args

    26 

    27     def run(self):

    28         self.function(*self.args)

    29 

    30 for name, func, args in [

    31         # Bug 147376:  TemporaryFile hung on Windows, starting in Python 2.4.

    32         ("tempfile.TemporaryFile", tempfile.TemporaryFile, ()),

    33 

    34         # The real cause for bug 147376:  ntpath.abspath() caused the hang.

    35         ("os.path.abspath", os.path.abspath, ('.',)),

    36         ]:

    37 

    38     t = Worker(func, args)

    39     t.start()

    40     t.join(TIMEOUT)

    41     if t.is_alive():

    42         errors.append("%s appeared to hang" % name)