270 lines
8.3 KiB
Python
270 lines
8.3 KiB
Python
import os
|
|
import unittest
|
|
import random
|
|
from test import support
|
|
thread = support.import_module('_thread')
|
|
import time
|
|
import sys
|
|
import weakref
|
|
|
|
from test import lock_tests
|
|
|
|
NUMTASKS = 10
|
|
NUMTRIPS = 3
|
|
POLL_SLEEP = 0.010 # seconds = 10 ms
|
|
|
|
_print_mutex = thread.allocate_lock()
|
|
|
|
def verbose_print(arg):
|
|
"""Helper function for printing out debugging output."""
|
|
if support.verbose:
|
|
with _print_mutex:
|
|
print(arg)
|
|
|
|
|
|
class BasicThreadTest(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.done_mutex = thread.allocate_lock()
|
|
self.done_mutex.acquire()
|
|
self.running_mutex = thread.allocate_lock()
|
|
self.random_mutex = thread.allocate_lock()
|
|
self.created = 0
|
|
self.running = 0
|
|
self.next_ident = 0
|
|
|
|
key = support.threading_setup()
|
|
self.addCleanup(support.threading_cleanup, *key)
|
|
|
|
|
|
class ThreadRunningTests(BasicThreadTest):
|
|
|
|
def newtask(self):
|
|
with self.running_mutex:
|
|
self.next_ident += 1
|
|
verbose_print("creating task %s" % self.next_ident)
|
|
thread.start_new_thread(self.task, (self.next_ident,))
|
|
self.created += 1
|
|
self.running += 1
|
|
|
|
def task(self, ident):
|
|
with self.random_mutex:
|
|
delay = random.random() / 10000.0
|
|
verbose_print("task %s will run for %sus" % (ident, round(delay*1e6)))
|
|
time.sleep(delay)
|
|
verbose_print("task %s done" % ident)
|
|
with self.running_mutex:
|
|
self.running -= 1
|
|
if self.created == NUMTASKS and self.running == 0:
|
|
self.done_mutex.release()
|
|
|
|
def test_starting_threads(self):
|
|
# Basic test for thread creation.
|
|
for i in range(NUMTASKS):
|
|
self.newtask()
|
|
verbose_print("waiting for tasks to complete...")
|
|
self.done_mutex.acquire()
|
|
verbose_print("all tasks done")
|
|
|
|
def test_stack_size(self):
|
|
# Various stack size tests.
|
|
self.assertEqual(thread.stack_size(), 0, "initial stack size is not 0")
|
|
|
|
thread.stack_size(0)
|
|
self.assertEqual(thread.stack_size(), 0, "stack_size not reset to default")
|
|
|
|
@unittest.skipIf(os.name not in ("nt", "posix"), 'test meant for nt and posix')
|
|
def test_nt_and_posix_stack_size(self):
|
|
try:
|
|
thread.stack_size(4096)
|
|
except ValueError:
|
|
verbose_print("caught expected ValueError setting "
|
|
"stack_size(4096)")
|
|
except thread.error:
|
|
self.skipTest("platform does not support changing thread stack "
|
|
"size")
|
|
|
|
fail_msg = "stack_size(%d) failed - should succeed"
|
|
for tss in (262144, 0x100000, 0):
|
|
thread.stack_size(tss)
|
|
self.assertEqual(thread.stack_size(), tss, fail_msg % tss)
|
|
verbose_print("successfully set stack_size(%d)" % tss)
|
|
|
|
for tss in (262144, 0x100000):
|
|
verbose_print("trying stack_size = (%d)" % tss)
|
|
self.next_ident = 0
|
|
self.created = 0
|
|
for i in range(NUMTASKS):
|
|
self.newtask()
|
|
|
|
verbose_print("waiting for all tasks to complete")
|
|
self.done_mutex.acquire()
|
|
verbose_print("all tasks done")
|
|
|
|
thread.stack_size(0)
|
|
|
|
def test__count(self):
|
|
# Test the _count() function.
|
|
orig = thread._count()
|
|
mut = thread.allocate_lock()
|
|
mut.acquire()
|
|
started = []
|
|
def task():
|
|
started.append(None)
|
|
mut.acquire()
|
|
mut.release()
|
|
thread.start_new_thread(task, ())
|
|
while not started:
|
|
time.sleep(POLL_SLEEP)
|
|
self.assertEqual(thread._count(), orig + 1)
|
|
# Allow the task to finish.
|
|
mut.release()
|
|
# The only reliable way to be sure that the thread ended from the
|
|
# interpreter's point of view is to wait for the function object to be
|
|
# destroyed.
|
|
done = []
|
|
wr = weakref.ref(task, lambda _: done.append(None))
|
|
del task
|
|
while not done:
|
|
time.sleep(POLL_SLEEP)
|
|
self.assertEqual(thread._count(), orig)
|
|
|
|
def test_save_exception_state_on_error(self):
|
|
# See issue #14474
|
|
def task():
|
|
started.release()
|
|
raise SyntaxError
|
|
def mywrite(self, *args):
|
|
try:
|
|
raise ValueError
|
|
except ValueError:
|
|
pass
|
|
real_write(self, *args)
|
|
c = thread._count()
|
|
started = thread.allocate_lock()
|
|
with support.captured_output("stderr") as stderr:
|
|
real_write = stderr.write
|
|
stderr.write = mywrite
|
|
started.acquire()
|
|
thread.start_new_thread(task, ())
|
|
started.acquire()
|
|
while thread._count() > c:
|
|
time.sleep(POLL_SLEEP)
|
|
self.assertIn("Traceback", stderr.getvalue())
|
|
|
|
|
|
class Barrier:
|
|
def __init__(self, num_threads):
|
|
self.num_threads = num_threads
|
|
self.waiting = 0
|
|
self.checkin_mutex = thread.allocate_lock()
|
|
self.checkout_mutex = thread.allocate_lock()
|
|
self.checkout_mutex.acquire()
|
|
|
|
def enter(self):
|
|
self.checkin_mutex.acquire()
|
|
self.waiting = self.waiting + 1
|
|
if self.waiting == self.num_threads:
|
|
self.waiting = self.num_threads - 1
|
|
self.checkout_mutex.release()
|
|
return
|
|
self.checkin_mutex.release()
|
|
|
|
self.checkout_mutex.acquire()
|
|
self.waiting = self.waiting - 1
|
|
if self.waiting == 0:
|
|
self.checkin_mutex.release()
|
|
return
|
|
self.checkout_mutex.release()
|
|
|
|
|
|
class BarrierTest(BasicThreadTest):
|
|
|
|
def test_barrier(self):
|
|
self.bar = Barrier(NUMTASKS)
|
|
self.running = NUMTASKS
|
|
for i in range(NUMTASKS):
|
|
thread.start_new_thread(self.task2, (i,))
|
|
verbose_print("waiting for tasks to end")
|
|
self.done_mutex.acquire()
|
|
verbose_print("tasks done")
|
|
|
|
def task2(self, ident):
|
|
for i in range(NUMTRIPS):
|
|
if ident == 0:
|
|
# give it a good chance to enter the next
|
|
# barrier before the others are all out
|
|
# of the current one
|
|
delay = 0
|
|
else:
|
|
with self.random_mutex:
|
|
delay = random.random() / 10000.0
|
|
verbose_print("task %s will run for %sus" %
|
|
(ident, round(delay * 1e6)))
|
|
time.sleep(delay)
|
|
verbose_print("task %s entering %s" % (ident, i))
|
|
self.bar.enter()
|
|
verbose_print("task %s leaving barrier" % ident)
|
|
with self.running_mutex:
|
|
self.running -= 1
|
|
# Must release mutex before releasing done, else the main thread can
|
|
# exit and set mutex to None as part of global teardown; then
|
|
# mutex.release() raises AttributeError.
|
|
finished = self.running == 0
|
|
if finished:
|
|
self.done_mutex.release()
|
|
|
|
class LockTests(lock_tests.LockTests):
|
|
locktype = thread.allocate_lock
|
|
|
|
|
|
class TestForkInThread(unittest.TestCase):
|
|
def setUp(self):
|
|
self.read_fd, self.write_fd = os.pipe()
|
|
|
|
@unittest.skipUnless(hasattr(os, 'fork'), 'need os.fork')
|
|
@support.reap_threads
|
|
def test_forkinthread(self):
|
|
running = True
|
|
status = "not set"
|
|
|
|
def thread1():
|
|
nonlocal running, status
|
|
|
|
# fork in a thread
|
|
pid = os.fork()
|
|
if pid == 0:
|
|
# child
|
|
try:
|
|
os.close(self.read_fd)
|
|
os.write(self.write_fd, b"OK")
|
|
finally:
|
|
os._exit(0)
|
|
else:
|
|
# parent
|
|
os.close(self.write_fd)
|
|
pid, status = os.waitpid(pid, 0)
|
|
running = False
|
|
|
|
thread.start_new_thread(thread1, ())
|
|
self.assertEqual(os.read(self.read_fd, 2), b"OK",
|
|
"Unable to fork() in thread")
|
|
while running:
|
|
time.sleep(POLL_SLEEP)
|
|
self.assertEqual(status, 0)
|
|
|
|
def tearDown(self):
|
|
try:
|
|
os.close(self.read_fd)
|
|
except OSError:
|
|
pass
|
|
|
|
try:
|
|
os.close(self.write_fd)
|
|
except OSError:
|
|
pass
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|