Gecko [ beriskala.com ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
audiodata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
capath	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
cjkencodings	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
data	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
decimaltestdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
encoded_modules	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
imghdrdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
namespace_pkgs	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
sndhdrdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
subprocessdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
support	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_email	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_importlib	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
test_json	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
tracedmodules	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
xmltestdata	[ DIR ]	drwxr-xr-x	2026-05-01 04:20
185test.db	16 KB	-rw-r--r--	2017-09-19 12:02
Sine-1000Hz-300ms.aif	60.25 KB	-rw-r--r--	2017-09-19 12:02
__init__.py	47 B	-rw-r--r--	2024-04-17 20:28
__main__.py	474 B	-rw-r--r--	2024-04-17 20:28
audiotests.py	9.34 KB	-rw-r--r--	2024-04-17 20:28
autotest.py	211 B	-rw-r--r--	2024-04-17 20:28
bad_coding.py	24 B	-rw-r--r--	2024-04-17 20:28
bad_coding2.py	30 B	-rw-r--r--	2024-04-17 20:28
badcert.pem	1.88 KB	-rw-r--r--	2017-09-19 12:02
badkey.pem	2.11 KB	-rw-r--r--	2017-09-19 12:02
badsyntax_3131.py	32 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future3.py	172 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future4.py	153 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future5.py	184 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future6.py	161 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future7.py	196 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future8.py	122 B	-rw-r--r--	2024-04-17 20:28
badsyntax_future9.py	142 B	-rw-r--r--	2024-04-17 20:28
badsyntax_pep3120.py	14 B	-rw-r--r--	2024-04-17 20:28
buffer_tests.py	10.79 KB	-rw-r--r--	2024-04-17 20:28
cfgparser.1	21 B	-rw-r--r--	2017-09-19 12:02
cfgparser.2	19.02 KB	-rw-r--r--	2017-09-19 12:02
cfgparser.3	1.55 KB	-rw-r--r--	2017-09-19 12:02
check_soundcard.vbs	411 B	-rw-r--r--	2017-09-19 12:02
cmath_testcases.txt	133.86 KB	-rw-r--r--	2017-09-19 12:02
coding20731.py	18 B	-rw-r--r--	2024-04-17 20:28
curses_tests.py	1.22 KB	-rwxr-xr-x	2024-04-17 20:28
datetimetester.py	146.82 KB	-rw-r--r--	2024-04-17 20:28
dh1024.pem	300 B	-rw-r--r--	2017-09-19 12:02
dis_module.py	76 B	-rw-r--r--	2024-04-17 20:28
doctest_aliases.py	240 B	-rw-r--r--	2024-04-17 20:28
double_const.py	1.18 KB	-rw-r--r--	2024-04-17 20:28
empty.vbs	70 B	-rw-r--r--	2017-09-19 12:02
exception_hierarchy.txt	1.69 KB	-rw-r--r--	2017-09-19 12:02
floating_points.txt	15.92 KB	-rw-r--r--	2017-09-19 12:02
fork_wait.py	2.1 KB	-rw-r--r--	2024-04-17 20:28
formatfloat_testcases.txt	7.45 KB	-rw-r--r--	2017-09-19 12:02
future_test1.py	229 B	-rw-r--r--	2024-04-17 20:28
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gdb_sample.py	153 B	-rw-r--r--	2024-04-17 20:28
ieee754.txt	3.21 KB	-rw-r--r--	2017-09-19 12:02
inspect_fodder.py	854 B	-rw-r--r--	2024-04-17 20:28
inspect_fodder2.py	1.39 KB	-rw-r--r--	2024-04-17 20:28
keycert.passwd.pem	1.79 KB	-rw-r--r--	2017-09-19 12:02
keycert.pem	1.74 KB	-rw-r--r--	2017-09-19 12:02
keycert2.pem	1.75 KB	-rw-r--r--	2017-09-19 12:02
list_tests.py	17.26 KB	-rw-r--r--	2024-04-17 20:28
lock_tests.py	25.47 KB	-rw-r--r--	2024-04-17 20:28
mailcap.txt	1.24 KB	-rw-r--r--	2017-09-19 12:02
make_ssl_certs.py	1.84 KB	-rw-r--r--	2024-04-17 20:28
mapping_tests.py	21.5 KB	-rw-r--r--	2024-04-17 20:28
math_testcases.txt	23.19 KB	-rw-r--r--	2017-09-19 12:02
memory_watchdog.py	859 B	-rw-r--r--	2024-04-17 20:28
mime.types	47.37 KB	-rw-r--r--	2017-09-19 12:02
mock_socket.py	3.32 KB	-rw-r--r--	2024-04-17 20:28
mp_fork_bomb.py	323 B	-rw-r--r--	2024-04-17 20:28
multibytecodec_support.py	14.25 KB	-rw-r--r--	2024-04-17 20:28
nokia.pem	1.88 KB	-rw-r--r--	2017-09-19 12:02
nullbytecert.pem	5.31 KB	-rw-r--r--	2017-09-19 12:02
nullcert.pem	0 B	-rw-r--r--	2017-09-19 12:02
outstanding_bugs.py	370 B	-rw-r--r--	2024-04-17 20:28
pickletester.py	60.31 KB	-rw-r--r--	2024-04-17 20:28
profilee.py	2.97 KB	-rw-r--r--	2024-04-17 20:28
pstats.pck	65.05 KB	-rw-r--r--	2017-09-19 12:02
pyclbr_input.py	648 B	-rw-r--r--	2024-04-17 20:28
pydoc_mod.py	461 B	-rw-r--r--	2024-04-17 20:28
pydocfodder.py	6.18 KB	-rw-r--r--	2024-04-17 20:28
pystone.py	7.22 KB	-rwxr-xr-x	2024-04-17 20:28
randv2_32.pck	7.34 KB	-rw-r--r--	2017-09-19 12:02
randv2_64.pck	7.19 KB	-rw-r--r--	2017-09-19 12:02
randv3.pck	7.82 KB	-rw-r--r--	2017-09-19 12:02
re_tests.py	31.06 KB	-rwxr-xr-x	2024-04-17 20:28
regrtest.py	63.54 KB	-rwxr-xr-x	2024-04-17 20:28
relimport.py	27 B	-rw-r--r--	2024-04-17 20:28
reperf.py	538 B	-rw-r--r--	2024-04-17 20:28
sample_doctest.py	1.02 KB	-rw-r--r--	2024-04-17 20:28
sample_doctest_no_docstrings.py	227 B	-rw-r--r--	2024-04-17 20:28
sample_doctest_no_doctests.py	269 B	-rw-r--r--	2024-04-17 20:28
script_helper.py	5.22 KB	-rw-r--r--	2024-04-17 20:28
selfsigned_pythontestdotnet.pem	956 B	-rw-r--r--	2017-09-19 12:02
seq_tests.py	13.49 KB	-rw-r--r--	2024-04-17 20:28
sgml_input.html	8.1 KB	-rw-r--r--	2017-09-19 12:02
sha256.pem	8.15 KB	-rw-r--r--	2017-09-19 12:02
sortperf.py	4.69 KB	-rw-r--r--	2024-04-17 20:28
ssl_cert.pem	867 B	-rw-r--r--	2017-09-19 12:02
ssl_key.passwd.pem	963 B	-rw-r--r--	2017-09-19 12:02
ssl_key.pem	916 B	-rw-r--r--	2017-09-19 12:02
ssl_servers.py	6.82 KB	-rw-r--r--	2024-04-17 20:28
string_tests.py	62.74 KB	-rw-r--r--	2024-04-17 20:28
test___all__.py	3.86 KB	-rw-r--r--	2024-04-17 20:28
test___future__.py	2.44 KB	-rw-r--r--	2024-04-17 20:28
test__locale.py	6.89 KB	-rw-r--r--	2024-04-17 20:28
test__osx_support.py	11.41 KB	-rw-r--r--	2024-04-17 20:28
test_abc.py	12.76 KB	-rw-r--r--	2024-04-17 20:28
test_abstract_numbers.py	1.49 KB	-rw-r--r--	2024-04-17 20:28
test_aifc.py	14.48 KB	-rw-r--r--	2024-04-17 20:28
test_argparse.py	158.6 KB	-rw-r--r--	2024-04-17 20:28
test_array.py	43.88 KB	-rw-r--r--	2024-04-17 20:28
test_ast.py	43.49 KB	-rw-r--r--	2024-04-17 20:28
test_asynchat.py	9.08 KB	-rw-r--r--	2024-04-17 20:28
test_asyncore.py	26.05 KB	-rw-r--r--	2024-04-17 20:28
test_atexit.py	3.53 KB	-rw-r--r--	2024-04-17 20:28
test_audioop.py	17.39 KB	-rw-r--r--	2024-04-17 20:28
test_augassign.py	7.44 KB	-rw-r--r--	2024-04-17 20:28
test_base64.py	14.34 KB	-rw-r--r--	2024-04-17 20:28
test_bigaddrspace.py	2.92 KB	-rw-r--r--	2024-04-17 20:28
test_bigmem.py	44.18 KB	-rw-r--r--	2024-04-17 20:28
test_binascii.py	9.94 KB	-rw-r--r--	2024-04-17 20:28
test_binhex.py	1.47 KB	-rw-r--r--	2024-04-17 20:28
test_binop.py	12.36 KB	-rw-r--r--	2024-04-17 20:28
test_bisect.py	13.65 KB	-rw-r--r--	2024-04-17 20:28
test_bool.py	11.81 KB	-rw-r--r--	2024-04-17 20:28
test_buffer.py	155.09 KB	-rw-r--r--	2024-04-17 20:28
test_bufio.py	2.54 KB	-rw-r--r--	2024-04-17 20:28
test_builtin.py	54.84 KB	-rw-r--r--	2024-04-17 20:28
test_bytes.py	52.86 KB	-rw-r--r--	2024-04-17 20:28
test_bz2.py	30.8 KB	-rw-r--r--	2024-04-17 20:28
test_calendar.py	38.7 KB	-rw-r--r--	2024-04-17 20:28
test_call.py	3.08 KB	-rw-r--r--	2024-04-17 20:28
test_capi.py	13.81 KB	-rw-r--r--	2024-04-17 20:28
test_cgi.py	17.34 KB	-rw-r--r--	2024-04-17 20:28
test_cgitb.py	2.49 KB	-rw-r--r--	2024-04-17 20:28
test_charmapcodec.py	1.75 KB	-rw-r--r--	2024-04-17 20:28
test_class.py	13.79 KB	-rw-r--r--	2024-04-17 20:28
test_cmath.py	20.38 KB	-rw-r--r--	2024-04-17 20:28
test_cmd.py	6.08 KB	-rw-r--r--	2024-04-17 20:28
test_cmd_line.py	15.35 KB	-rw-r--r--	2024-04-17 20:28
test_cmd_line_script.py	16.95 KB	-rw-r--r--	2024-04-17 20:28
test_code.py	3.54 KB	-rw-r--r--	2024-04-17 20:28
test_code_module.py	2.42 KB	-rw-r--r--	2024-04-17 20:28
test_codeccallbacks.py	33.17 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_cn.py	3.38 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_hk.py	775 B	-rw-r--r--	2024-04-17 20:28
test_codecencodings_iso2022.py	1.43 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_jp.py	4.86 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_kr.py	3.03 KB	-rw-r--r--	2024-04-17 20:28
test_codecencodings_tw.py	755 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_cn.py	930 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_hk.py	505 B	-rw-r--r--	2024-04-17 20:28
test_codecmaps_jp.py	1.88 KB	-rw-r--r--	2024-04-17 20:28
test_codecmaps_kr.py	1.34 KB	-rw-r--r--	2024-04-17 20:28
test_codecmaps_tw.py	880 B	-rw-r--r--	2024-04-17 20:28
test_codecs.py	96.02 KB	-rw-r--r--	2024-04-17 20:28
test_codeop.py	7.45 KB	-rw-r--r--	2024-04-17 20:28
test_coding.py	2.51 KB	-rw-r--r--	2024-04-17 20:28
test_collections.py	54.31 KB	-rw-r--r--	2024-04-17 20:28
test_colorsys.py	2.77 KB	-rw-r--r--	2024-04-17 20:28
test_compare.py	1.63 KB	-rw-r--r--	2024-04-17 20:28
test_compile.py	18.62 KB	-rw-r--r--	2024-04-17 20:28
test_compileall.py	15.73 KB	-rw-r--r--	2024-04-17 20:28
test_complex.py	27.09 KB	-rw-r--r--	2024-04-17 20:28
test_concurrent_futures.py	22.57 KB	-rw-r--r--	2024-04-17 20:28
test_configparser.py	69.26 KB	-rw-r--r--	2024-04-17 20:28
test_contains.py	2.58 KB	-rw-r--r--	2024-04-17 20:28
test_contextlib.py	21.39 KB	-rw-r--r--	2024-04-17 20:28
test_copy.py	21.9 KB	-rw-r--r--	2024-04-17 20:28
test_copyreg.py	4.12 KB	-rw-r--r--	2024-04-17 20:28
test_cprofile.py	5.32 KB	-rw-r--r--	2024-04-17 20:28
test_crashers.py	1.18 KB	-rw-r--r--	2024-04-17 20:28
test_crypt.py	1.24 KB	-rw-r--r--	2024-04-17 20:28
test_csv.py	40.9 KB	-rw-r--r--	2024-04-17 20:28
test_ctypes.py	400 B	-rw-r--r--	2024-04-17 20:28
test_curses.py	10.7 KB	-rw-r--r--	2024-04-17 20:28
test_datetime.py	1.81 KB	-rw-r--r--	2024-04-17 20:28
test_dbm.py	5.52 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_dumb.py	5.49 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_gnu.py	2.85 KB	-rw-r--r--	2024-04-17 20:28
test_dbm_ndbm.py	1.13 KB	-rw-r--r--	2024-04-17 20:28
test_decimal.py	197.66 KB	-rw-r--r--	2024-04-17 20:28
test_decorators.py	9.6 KB	-rw-r--r--	2024-04-17 20:28
test_defaultdict.py	5.94 KB	-rw-r--r--	2024-04-17 20:28
test_deque.py	25 KB	-rw-r--r--	2024-04-17 20:28
test_descr.py	156.64 KB	-rw-r--r--	2024-04-17 20:28
test_descrtut.py	11.5 KB	-rw-r--r--	2024-04-17 20:28
test_devpoll.py	3.49 KB	-rw-r--r--	2024-04-17 20:28
test_dict.py	31.11 KB	-rw-r--r--	2024-04-17 20:28
test_dictcomps.py	3.69 KB	-rw-r--r--	2024-04-17 20:28
test_dictviews.py	8.51 KB	-rw-r--r--	2024-04-17 20:28
test_difflib.py	10.78 KB	-rw-r--r--	2024-04-17 20:28
test_difflib_expect.html	100.86 KB	-rw-r--r--	2017-09-19 12:02
test_dis.py	12.33 KB	-rw-r--r--	2024-04-17 20:28
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test_doctest.py	81.78 KB	-rw-r--r--	2024-04-17 20:28
test_doctest.txt	300 B	-rw-r--r--	2017-09-19 12:02
test_doctest2.py	2.3 KB	-rw-r--r--	2024-04-17 20:28
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test_eof.py	855 B	-rw-r--r--	2024-04-17 20:28
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test_fnmatch.py	2.84 KB	-rw-r--r--	2024-04-17 20:28
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test_future4.py	105 B	-rw-r--r--	2024-04-17 20:28
test_future5.py	510 B	-rw-r--r--	2024-04-17 20:28
test_gc.py	29 KB	-rw-r--r--	2024-04-17 20:28
test_gdb.py	35.86 KB	-rw-r--r--	2024-04-17 20:28
test_generators.py	48.5 KB	-rw-r--r--	2024-04-17 20:28
test_genericpath.py	13.3 KB	-rw-r--r--	2024-04-17 20:28
test_genexps.py	7.12 KB	-rw-r--r--	2024-04-17 20:28
test_getargs2.py	23.74 KB	-rw-r--r--	2024-04-17 20:28
test_getopt.py	6.8 KB	-rw-r--r--	2024-04-17 20:28
test_getpass.py	5.95 KB	-rw-r--r--	2024-04-17 20:28
test_gettext.py	22.11 KB	-rw-r--r--	2024-04-17 20:28
test_glob.py	6.69 KB	-rw-r--r--	2024-04-17 20:28
test_global.py	1.25 KB	-rw-r--r--	2024-04-17 20:28
test_grammar.py	31.96 KB	-rw-r--r--	2024-04-17 20:28
test_grp.py	3.18 KB	-rw-r--r--	2024-04-17 20:28
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test_heapq.py	14.14 KB	-rw-r--r--	2024-04-17 20:28
test_hmac.py	17.23 KB	-rw-r--r--	2024-04-17 20:28
test_html.py	579 B	-rw-r--r--	2024-04-17 20:28
test_htmlparser.py	30.74 KB	-rw-r--r--	2024-04-17 20:28
test_http_cookiejar.py	70 KB	-rw-r--r--	2024-04-17 20:28
test_http_cookies.py	9.98 KB	-rw-r--r--	2024-04-17 20:28
test_httplib.py	37.59 KB	-rw-r--r--	2024-04-17 20:28
test_httpservers.py	26.35 KB	-rw-r--r--	2024-04-17 20:28
test_idle.py	1.3 KB	-rw-r--r--	2024-04-17 20:28
test_imaplib.py	15.67 KB	-rw-r--r--	2024-04-17 20:28
test_imghdr.py	4.31 KB	-rw-r--r--	2024-04-17 20:28
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Rename

"""
Tests for the threading module.
"""

import test.support
from test.support import verbose, strip_python_stderr, import_module, cpython_only
from test.script_helper import assert_python_ok

import random
import re
import sys
_thread = import_module('_thread')
threading = import_module('threading')
import time
import unittest
import weakref
import os
from test.script_helper import assert_python_ok, assert_python_failure
import subprocess
try:
    import _testcapi
except ImportError:
    _testcapi = None

from test import lock_tests

# A trivial mutable counter.
class Counter(object):
    def __init__(self):
        self.value = 0
    def inc(self):
        self.value += 1
    def dec(self):
        self.value -= 1
    def get(self):
        return self.value

class TestThread(threading.Thread):
    def __init__(self, name, testcase, sema, mutex, nrunning):
        threading.Thread.__init__(self, name=name)
        self.testcase = testcase
        self.sema = sema
        self.mutex = mutex
        self.nrunning = nrunning

def run(self):
        delay = random.random() / 10000.0
        if verbose:
            print('task %s will run for %.1f usec' %
                  (self.name, delay * 1e6))

with self.sema:
            with self.mutex:
                self.nrunning.inc()
                if verbose:
                    print(self.nrunning.get(), 'tasks are running')
                self.testcase.assertTrue(self.nrunning.get() <= 3)

time.sleep(delay)
            if verbose:
                print('task', self.name, 'done')

with self.mutex:
                self.nrunning.dec()
                self.testcase.assertTrue(self.nrunning.get() >= 0)
                if verbose:
                    print('%s is finished. %d tasks are running' %
                          (self.name, self.nrunning.get()))

class BaseTestCase(unittest.TestCase):
    def setUp(self):
        self._threads = test.support.threading_setup()

def tearDown(self):
        test.support.threading_cleanup(*self._threads)
        test.support.reap_children()

class ThreadTests(BaseTestCase):

# Create a bunch of threads, let each do some work, wait until all are
    # done.
    def test_various_ops(self):
        # This takes about n/3 seconds to run (about n/3 clumps of tasks,
        # times about 1 second per clump).
        NUMTASKS = 10

# no more than 3 of the 10 can run at once
        sema = threading.BoundedSemaphore(value=3)
        mutex = threading.RLock()
        numrunning = Counter()

threads = []

for i in range(NUMTASKS):
            t = TestThread("<thread %d>"%i, self, sema, mutex, numrunning)
            threads.append(t)
            self.assertEqual(t.ident, None)
            self.assertTrue(re.match('<TestThread\(.*, initial\)>', repr(t)))
            t.start()

if verbose:
            print('waiting for all tasks to complete')
        for t in threads:
            t.join(NUMTASKS)
            self.assertTrue(not t.is_alive())
            self.assertNotEqual(t.ident, 0)
            self.assertFalse(t.ident is None)
            self.assertTrue(re.match('<TestThread\(.*, stopped -?\d+\)>',
                                     repr(t)))
        if verbose:
            print('all tasks done')
        self.assertEqual(numrunning.get(), 0)

def test_ident_of_no_threading_threads(self):
        # The ident still must work for the main thread and dummy threads.
        self.assertFalse(threading.currentThread().ident is None)
        def f():
            ident.append(threading.currentThread().ident)
            done.set()
        done = threading.Event()
        ident = []
        _thread.start_new_thread(f, ())
        done.wait()
        self.assertFalse(ident[0] is None)
        # Kill the "immortal" _DummyThread
        del threading._active[ident[0]]

# run with a small(ish) thread stack size (256kB)
    def test_various_ops_small_stack(self):
        if verbose:
            print('with 256kB thread stack size...')
        try:
            threading.stack_size(262144)
        except _thread.error:
            raise unittest.SkipTest(
                'platform does not support changing thread stack size')
        self.test_various_ops()
        threading.stack_size(0)

# run with a large thread stack size (1MB)
    def test_various_ops_large_stack(self):
        if verbose:
            print('with 1MB thread stack size...')
        try:
            threading.stack_size(0x100000)
        except _thread.error:
            raise unittest.SkipTest(
                'platform does not support changing thread stack size')
        self.test_various_ops()
        threading.stack_size(0)

def test_foreign_thread(self):
        # Check that a "foreign" thread can use the threading module.
        def f(mutex):
            # Calling current_thread() forces an entry for the foreign
            # thread to get made in the threading._active map.
            threading.current_thread()
            mutex.release()

mutex = threading.Lock()
        mutex.acquire()
        tid = _thread.start_new_thread(f, (mutex,))
        # Wait for the thread to finish.
        mutex.acquire()
        self.assertIn(tid, threading._active)
        self.assertIsInstance(threading._active[tid], threading._DummyThread)
        del threading._active[tid]

# PyThreadState_SetAsyncExc() is a CPython-only gimmick, not (currently)
    # exposed at the Python level.  This test relies on ctypes to get at it.
    def test_PyThreadState_SetAsyncExc(self):
        ctypes = import_module("ctypes")

set_async_exc = ctypes.pythonapi.PyThreadState_SetAsyncExc

class AsyncExc(Exception):
            pass

exception = ctypes.py_object(AsyncExc)

# First check it works when setting the exception from the same thread.
        tid = threading.get_ident()

try:
            result = set_async_exc(ctypes.c_long(tid), exception)
            # The exception is async, so we might have to keep the VM busy until
            # it notices.
            while True:
                pass
        except AsyncExc:
            pass
        else:
            # This code is unreachable but it reflects the intent. If we wanted
            # to be smarter the above loop wouldn't be infinite.
            self.fail("AsyncExc not raised")
        try:
            self.assertEqual(result, 1) # one thread state modified
        except UnboundLocalError:
            # The exception was raised too quickly for us to get the result.
            pass

# `worker_started` is set by the thread when it's inside a try/except
        # block waiting to catch the asynchronously set AsyncExc exception.
        # `worker_saw_exception` is set by the thread upon catching that
        # exception.
        worker_started = threading.Event()
        worker_saw_exception = threading.Event()

class Worker(threading.Thread):
            def run(self):
                self.id = threading.get_ident()
                self.finished = False

try:
                    while True:
                        worker_started.set()
                        time.sleep(0.1)
                except AsyncExc:
                    self.finished = True
                    worker_saw_exception.set()

t = Worker()
        t.daemon = True # so if this fails, we don't hang Python at shutdown
        t.start()
        if verbose:
            print("    started worker thread")

# Try a thread id that doesn't make sense.
        if verbose:
            print("    trying nonsensical thread id")
        result = set_async_exc(ctypes.c_long(-1), exception)
        self.assertEqual(result, 0)  # no thread states modified

# Now raise an exception in the worker thread.
        if verbose:
            print("    waiting for worker thread to get started")
        ret = worker_started.wait()
        self.assertTrue(ret)
        if verbose:
            print("    verifying worker hasn't exited")
        self.assertTrue(not t.finished)
        if verbose:
            print("    attempting to raise asynch exception in worker")
        result = set_async_exc(ctypes.c_long(t.id), exception)
        self.assertEqual(result, 1) # one thread state modified
        if verbose:
            print("    waiting for worker to say it caught the exception")
        worker_saw_exception.wait(timeout=10)
        self.assertTrue(t.finished)
        if verbose:
            print("    all OK -- joining worker")
        if t.finished:
            t.join()
        # else the thread is still running, and we have no way to kill it

def test_limbo_cleanup(self):
        # Issue 7481: Failure to start thread should cleanup the limbo map.
        def fail_new_thread(*args):
            raise threading.ThreadError()
        _start_new_thread = threading._start_new_thread
        threading._start_new_thread = fail_new_thread
        try:
            t = threading.Thread(target=lambda: None)
            self.assertRaises(threading.ThreadError, t.start)
            self.assertFalse(
                t in threading._limbo,
                "Failed to cleanup _limbo map on failure of Thread.start().")
        finally:
            threading._start_new_thread = _start_new_thread

def test_finalize_runnning_thread(self):
        # Issue 1402: the PyGILState_Ensure / _Release functions may be called
        # very late on python exit: on deallocation of a running thread for
        # example.
        import_module("ctypes")

rc, out, err = assert_python_failure("-c", """if 1:
            import ctypes, sys, time, _thread

# This lock is used as a simple event variable.
            ready = _thread.allocate_lock()
            ready.acquire()

# Module globals are cleared before __del__ is run
            # So we save the functions in class dict
            class C:
                ensure = ctypes.pythonapi.PyGILState_Ensure
                release = ctypes.pythonapi.PyGILState_Release
                def __del__(self):
                    state = self.ensure()
                    self.release(state)

def waitingThread():
                x = C()
                ready.release()
                time.sleep(100)

_thread.start_new_thread(waitingThread, ())
            ready.acquire()  # Be sure the other thread is waiting.
            sys.exit(42)
            """)
        self.assertEqual(rc, 42)

def test_finalize_with_trace(self):
        # Issue1733757
        # Avoid a deadlock when sys.settrace steps into threading._shutdown
        assert_python_ok("-c", """if 1:
            import sys, threading

# A deadlock-killer, to prevent the
            # testsuite to hang forever
            def killer():
                import os, time
                time.sleep(2)
                print('program blocked; aborting')
                os._exit(2)
            t = threading.Thread(target=killer)
            t.daemon = True
            t.start()

# This is the trace function
            def func(frame, event, arg):
                threading.current_thread()
                return func

sys.settrace(func)
            """)

def test_join_nondaemon_on_shutdown(self):
        # Issue 1722344
        # Raising SystemExit skipped threading._shutdown
        rc, out, err = assert_python_ok("-c", """if 1:
                import threading
                from time import sleep

def child():
                    sleep(1)
                    # As a non-daemon thread we SHOULD wake up and nothing
                    # should be torn down yet
                    print("Woke up, sleep function is:", sleep)

threading.Thread(target=child).start()
                raise SystemExit
            """)
        self.assertEqual(out.strip(),
            b"Woke up, sleep function is: <built-in function sleep>")
        self.assertEqual(err, b"")

def test_enumerate_after_join(self):
        # Try hard to trigger #1703448: a thread is still returned in
        # threading.enumerate() after it has been join()ed.
        enum = threading.enumerate
        old_interval = sys.getswitchinterval()
        try:
            for i in range(1, 100):
                sys.setswitchinterval(i * 0.0002)
                t = threading.Thread(target=lambda: None)
                t.start()
                t.join()
                l = enum()
                self.assertNotIn(t, l,
                    "#1703448 triggered after %d trials: %s" % (i, l))
        finally:
            sys.setswitchinterval(old_interval)

def test_no_refcycle_through_target(self):
        class RunSelfFunction(object):
            def __init__(self, should_raise):
                # The links in this refcycle from Thread back to self
                # should be cleaned up when the thread completes.
                self.should_raise = should_raise
                self.thread = threading.Thread(target=self._run,
                                               args=(self,),
                                               kwargs={'yet_another':self})
                self.thread.start()

def _run(self, other_ref, yet_another):
                if self.should_raise:
                    raise SystemExit

cyclic_object = RunSelfFunction(should_raise=False)
        weak_cyclic_object = weakref.ref(cyclic_object)
        cyclic_object.thread.join()
        del cyclic_object
        self.assertIsNone(weak_cyclic_object(),
                         msg=('%d references still around' %
                              sys.getrefcount(weak_cyclic_object())))

raising_cyclic_object = RunSelfFunction(should_raise=True)
        weak_raising_cyclic_object = weakref.ref(raising_cyclic_object)
        raising_cyclic_object.thread.join()
        del raising_cyclic_object
        self.assertIsNone(weak_raising_cyclic_object(),
                         msg=('%d references still around' %
                              sys.getrefcount(weak_raising_cyclic_object())))

def test_old_threading_api(self):
        # Just a quick sanity check to make sure the old method names are
        # still present
        t = threading.Thread()
        t.isDaemon()
        t.setDaemon(True)
        t.getName()
        t.setName("name")
        t.isAlive()
        e = threading.Event()
        e.isSet()
        threading.activeCount()

def test_repr_daemon(self):
        t = threading.Thread()
        self.assertFalse('daemon' in repr(t))
        t.daemon = True
        self.assertTrue('daemon' in repr(t))

def test_deamon_param(self):
        t = threading.Thread()
        self.assertFalse(t.daemon)
        t = threading.Thread(daemon=False)
        self.assertFalse(t.daemon)
        t = threading.Thread(daemon=True)
        self.assertTrue(t.daemon)

@unittest.skipUnless(hasattr(os, 'fork'), 'test needs fork()')
    def test_dummy_thread_after_fork(self):
        # Issue #14308: a dummy thread in the active list doesn't mess up
        # the after-fork mechanism.
        code = """if 1:
            import _thread, threading, os, time

def background_thread(evt):
                # Creates and registers the _DummyThread instance
                threading.current_thread()
                evt.set()
                time.sleep(10)

evt = threading.Event()
            _thread.start_new_thread(background_thread, (evt,))
            evt.wait()
            assert threading.active_count() == 2, threading.active_count()
            if os.fork() == 0:
                assert threading.active_count() == 1, threading.active_count()
                os._exit(0)
            else:
                os.wait()
        """
        _, out, err = assert_python_ok("-c", code)
        self.assertEqual(out, b'')
        self.assertEqual(err, b'')

@unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
    def test_is_alive_after_fork(self):
        # Try hard to trigger #18418: is_alive() could sometimes be True on
        # threads that vanished after a fork.
        old_interval = sys.getswitchinterval()
        self.addCleanup(sys.setswitchinterval, old_interval)

# Make the bug more likely to manifest.
        sys.setswitchinterval(1e-6)

for i in range(20):
            t = threading.Thread(target=lambda: None)
            t.start()
            self.addCleanup(t.join)
            pid = os.fork()
            if pid == 0:
                os._exit(1 if t.is_alive() else 0)
            else:
                pid, status = os.waitpid(pid, 0)
                self.assertEqual(0, status)

def test_BoundedSemaphore_limit(self):
        # BoundedSemaphore should raise ValueError if released too often.
        for limit in range(1, 10):
            bs = threading.BoundedSemaphore(limit)
            threads = [threading.Thread(target=bs.acquire)
                       for _ in range(limit)]
            for t in threads:
                t.start()
            for t in threads:
                t.join()
            threads = [threading.Thread(target=bs.release)
                       for _ in range(limit)]
            for t in threads:
                t.start()
            for t in threads:
                t.join()
            self.assertRaises(ValueError, bs.release)

class ThreadJoinOnShutdown(BaseTestCase):

# Between fork() and exec(), only async-safe functions are allowed (issues
    # #12316 and #11870), and fork() from a worker thread is known to trigger
    # problems with some operating systems (issue #3863): skip problematic tests
    # on platforms known to behave badly.
    platforms_to_skip = ('freebsd4', 'freebsd5', 'freebsd6', 'netbsd5',
                         'os2emx', 'hp-ux11')

def _run_and_join(self, script):
        script = """if 1:
            import sys, os, time, threading

# a thread, which waits for the main program to terminate
            def joiningfunc(mainthread):
                mainthread.join()
                print('end of thread')
                # stdout is fully buffered because not a tty, we have to flush
                # before exit.
                sys.stdout.flush()
        \n""" + script

rc, out, err = assert_python_ok("-c", script)
        data = out.decode().replace('\r', '')
        self.assertEqual(data, "end of main\nend of thread\n")

def test_1_join_on_shutdown(self):
        # The usual case: on exit, wait for a non-daemon thread
        script = """if 1:
            import os
            t = threading.Thread(target=joiningfunc,
                                 args=(threading.current_thread(),))
            t.start()
            time.sleep(0.1)
            print('end of main')
            """
        self._run_and_join(script)

@unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
    @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
    def test_2_join_in_forked_process(self):
        # Like the test above, but from a forked interpreter
        script = """if 1:
            childpid = os.fork()
            if childpid != 0:
                os.waitpid(childpid, 0)
                sys.exit(0)

t = threading.Thread(target=joiningfunc,
                                 args=(threading.current_thread(),))
            t.start()
            print('end of main')
            """
        self._run_and_join(script)

@unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
    @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
    def test_3_join_in_forked_from_thread(self):
        # Like the test above, but fork() was called from a worker thread
        # In the forked process, the main Thread object must be marked as stopped.

script = """if 1:
            main_thread = threading.current_thread()
            def worker():
                childpid = os.fork()
                if childpid != 0:
                    os.waitpid(childpid, 0)
                    sys.exit(0)

t = threading.Thread(target=joiningfunc,
                                     args=(main_thread,))
                print('end of main')
                t.start()
                t.join() # Should not block: main_thread is already stopped

w = threading.Thread(target=worker)
            w.start()
            """
        self._run_and_join(script)

def assertScriptHasOutput(self, script, expected_output):
        rc, out, err = assert_python_ok("-c", script)
        data = out.decode().replace('\r', '')
        self.assertEqual(data, expected_output)

@unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
    @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
    def test_4_joining_across_fork_in_worker_thread(self):
        # There used to be a possible deadlock when forking from a child
        # thread.  See http://bugs.python.org/issue6643.

# The script takes the following steps:
        # - The main thread in the parent process starts a new thread and then
        #   tries to join it.
        # - The join operation acquires the Lock inside the thread's _block
        #   Condition.  (See threading.py:Thread.join().)
        # - We stub out the acquire method on the condition to force it to wait
        #   until the child thread forks.  (See LOCK ACQUIRED HERE)
        # - The child thread forks.  (See LOCK HELD and WORKER THREAD FORKS
        #   HERE)
        # - The main thread of the parent process enters Condition.wait(),
        #   which releases the lock on the child thread.
        # - The child process returns.  Without the necessary fix, when the
        #   main thread of the child process (which used to be the child thread
        #   in the parent process) attempts to exit, it will try to acquire the
        #   lock in the Thread._block Condition object and hang, because the
        #   lock was held across the fork.

script = """if 1:
            import os, time, threading

finish_join = False
            start_fork = False

def worker():
                # Wait until this thread's lock is acquired before forking to
                # create the deadlock.
                global finish_join
                while not start_fork:
                    time.sleep(0.01)
                # LOCK HELD: Main thread holds lock across this call.
                childpid = os.fork()
                finish_join = True
                if childpid != 0:
                    # Parent process just waits for child.
                    os.waitpid(childpid, 0)
                # Child process should just return.

w = threading.Thread(target=worker)

# Stub out the private condition variable's lock acquire method.
            # This acquires the lock and then waits until the child has forked
            # before returning, which will release the lock soon after.  If
            # someone else tries to fix this test case by acquiring this lock
            # before forking instead of resetting it, the test case will
            # deadlock when it shouldn't.
            condition = w._block
            orig_acquire = condition.acquire
            call_count_lock = threading.Lock()
            call_count = 0
            def my_acquire():
                global call_count
                global start_fork
                orig_acquire()  # LOCK ACQUIRED HERE
                start_fork = True
                if call_count == 0:
                    while not finish_join:
                        time.sleep(0.01)  # WORKER THREAD FORKS HERE
                with call_count_lock:
                    call_count += 1
            condition.acquire = my_acquire

w.start()
            w.join()
            print('end of main')
            """
        self.assertScriptHasOutput(script, "end of main\n")

@unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
    @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
    def test_5_clear_waiter_locks_to_avoid_crash(self):
        # Check that a spawned thread that forks doesn't segfault on certain
        # platforms, namely OS X.  This used to happen if there was a waiter
        # lock in the thread's condition variable's waiters list.  Even though
        # we know the lock will be held across the fork, it is not safe to
        # release locks held across forks on all platforms, so releasing the
        # waiter lock caused a segfault on OS X.  Furthermore, since locks on
        # OS X are (as of this writing) implemented with a mutex + condition
        # variable instead of a semaphore, while we know that the Python-level
        # lock will be acquired, we can't know if the internal mutex will be
        # acquired at the time of the fork.

script = """if True:
            import os, time, threading

start_fork = False

def worker():
                # Wait until the main thread has attempted to join this thread
                # before continuing.
                while not start_fork:
                    time.sleep(0.01)
                childpid = os.fork()
                if childpid != 0:
                    # Parent process just waits for child.
                    (cpid, rc) = os.waitpid(childpid, 0)
                    assert cpid == childpid
                    assert rc == 0
                    print('end of worker thread')
                else:
                    # Child process should just return.
                    pass

w = threading.Thread(target=worker)

# Stub out the private condition variable's _release_save method.
            # This releases the condition's lock and flips the global that
            # causes the worker to fork.  At this point, the problematic waiter
            # lock has been acquired once by the waiter and has been put onto
            # the waiters list.
            condition = w._block
            orig_release_save = condition._release_save
            def my_release_save():
                global start_fork
                orig_release_save()
                # Waiter lock held here, condition lock released.
                start_fork = True
            condition._release_save = my_release_save

w.start()
            w.join()
            print('end of main thread')
            """
        output = "end of worker thread\nend of main thread\n"
        self.assertScriptHasOutput(script, output)

@unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
    def test_6_daemon_threads(self):
        # Check that a daemon thread cannot crash the interpreter on shutdown
        # by manipulating internal structures that are being disposed of in
        # the main thread.
        script = """if True:
            import os
            import random
            import sys
            import time
            import threading

thread_has_run = set()

def random_io():
                '''Loop for a while sleeping random tiny amounts and doing some I/O.'''
                while True:
                    in_f = open(os.__file__, 'rb')
                    stuff = in_f.read(200)
                    null_f = open(os.devnull, 'wb')
                    null_f.write(stuff)
                    time.sleep(random.random() / 1995)
                    null_f.close()
                    in_f.close()
                    thread_has_run.add(threading.current_thread())

def main():
                count = 0
                for _ in range(40):
                    new_thread = threading.Thread(target=random_io)
                    new_thread.daemon = True
                    new_thread.start()
                    count += 1
                while len(thread_has_run) < count:
                    time.sleep(0.001)
                # Trigger process shutdown
                sys.exit(0)

main()
            """
        rc, out, err = assert_python_ok('-c', script)
        self.assertFalse(err)

@unittest.skipUnless(hasattr(os, 'fork'), "needs os.fork()")
    @unittest.skipIf(sys.platform in platforms_to_skip, "due to known OS bug")
    def test_reinit_tls_after_fork(self):
        # Issue #13817: fork() would deadlock in a multithreaded program with
        # the ad-hoc TLS implementation.

def do_fork_and_wait():
            # just fork a child process and wait it
            pid = os.fork()
            if pid > 0:
                os.waitpid(pid, 0)
            else:
                os._exit(0)

# start a bunch of threads that will fork() child processes
        threads = []
        for i in range(16):
            t = threading.Thread(target=do_fork_and_wait)
            threads.append(t)
            t.start()

for t in threads:
            t.join()

@cpython_only
    @unittest.skipIf(_testcapi is None, "need _testcapi module")
    def test_frame_tstate_tracing(self):
        # Issue #14432: Crash when a generator is created in a C thread that is
        # destroyed while the generator is still used. The issue was that a
        # generator contains a frame, and the frame kept a reference to the
        # Python state of the destroyed C thread. The crash occurs when a trace
        # function is setup.

def noop_trace(frame, event, arg):
            # no operation
            return noop_trace

def generator():
            while 1:
                yield "genereator"

def callback():
            if callback.gen is None:
                callback.gen = generator()
            return next(callback.gen)
        callback.gen = None

old_trace = sys.gettrace()
        sys.settrace(noop_trace)
        try:
            # Install a trace function
            threading.settrace(noop_trace)

# Create a generator in a C thread which exits after the call
            _testcapi.call_in_temporary_c_thread(callback)

# Call the generator in a different Python thread, check that the
            # generator didn't keep a reference to the destroyed thread state
            for test in range(3):
                # The trace function is still called here
                callback()
        finally:
            sys.settrace(old_trace)

class ThreadingExceptionTests(BaseTestCase):
    # A RuntimeError should be raised if Thread.start() is called
    # multiple times.
    def test_start_thread_again(self):
        thread = threading.Thread()
        thread.start()
        self.assertRaises(RuntimeError, thread.start)

def test_joining_current_thread(self):
        current_thread = threading.current_thread()
        self.assertRaises(RuntimeError, current_thread.join);

def test_joining_inactive_thread(self):
        thread = threading.Thread()
        self.assertRaises(RuntimeError, thread.join)

def test_daemonize_active_thread(self):
        thread = threading.Thread()
        thread.start()
        self.assertRaises(RuntimeError, setattr, thread, "daemon", True)

def test_releasing_unacquired_lock(self):
        lock = threading.Lock()
        self.assertRaises(RuntimeError, lock.release)

@unittest.skipUnless(sys.platform == 'darwin' and test.support.python_is_optimized(),
                         'test macosx problem')
    def test_recursion_limit(self):
        # Issue 9670
        # test that excessive recursion within a non-main thread causes
        # an exception rather than crashing the interpreter on platforms
        # like Mac OS X or FreeBSD which have small default stack sizes
        # for threads
        script = """if True:
            import threading

def recurse():
                return recurse()

def outer():
                try:
                    recurse()
                except RuntimeError:
                    pass

w = threading.Thread(target=outer)
            w.start()
            w.join()
            print('end of main thread')
            """
        expected_output = "end of main thread\n"
        p = subprocess.Popen([sys.executable, "-c", script],
                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        stdout, stderr = p.communicate()
        data = stdout.decode().replace('\r', '')
        self.assertEqual(p.returncode, 0, "Unexpected error: " + stderr.decode())
        self.assertEqual(data, expected_output)

class TimerTests(BaseTestCase):

def setUp(self):
        BaseTestCase.setUp(self)
        self.callback_args = []
        self.callback_event = threading.Event()

def test_init_immutable_default_args(self):
        # Issue 17435: constructor defaults were mutable objects, they could be
        # mutated via the object attributes and affect other Timer objects.
        timer1 = threading.Timer(0.01, self._callback_spy)
        timer1.start()
        self.callback_event.wait()
        timer1.args.append("blah")
        timer1.kwargs["foo"] = "bar"
        self.callback_event.clear()
        timer2 = threading.Timer(0.01, self._callback_spy)
        timer2.start()
        self.callback_event.wait()
        self.assertEqual(len(self.callback_args), 2)
        self.assertEqual(self.callback_args, [((), {}), ((), {})])

def _callback_spy(self, *args, **kwargs):
        self.callback_args.append((args[:], kwargs.copy()))
        self.callback_event.set()

class LockTests(lock_tests.LockTests):
    locktype = staticmethod(threading.Lock)

class PyRLockTests(lock_tests.RLockTests):
    locktype = staticmethod(threading._PyRLock)

@unittest.skipIf(threading._CRLock is None, 'RLock not implemented in C')
class CRLockTests(lock_tests.RLockTests):
    locktype = staticmethod(threading._CRLock)

class EventTests(lock_tests.EventTests):
    eventtype = staticmethod(threading.Event)

class ConditionAsRLockTests(lock_tests.RLockTests):
    # An Condition uses an RLock by default and exports its API.
    locktype = staticmethod(threading.Condition)

class ConditionTests(lock_tests.ConditionTests):
    condtype = staticmethod(threading.Condition)

class SemaphoreTests(lock_tests.SemaphoreTests):
    semtype = staticmethod(threading.Semaphore)

class BoundedSemaphoreTests(lock_tests.BoundedSemaphoreTests):
    semtype = staticmethod(threading.BoundedSemaphore)

class BarrierTests(lock_tests.BarrierTests):
    barriertype = staticmethod(threading.Barrier)

if __name__ == "__main__":
    unittest.main()