# 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", tempfile.TemporaryFile, ()),

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

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

        ]:

    t = Worker(func, args)

    t.start()

    t.join(TIMEOUT)

    if t.is_alive():

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