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# Run the _testcapi module tests (tests for the Python/C API): by defn,
# these are all functions _testcapi exports whose name begins with 'test_'.
from __future__ import with_statement
import sys
import time
import random
import unittest
from test import test_support
try:
import threading
except ImportError:
threading = None
import _testcapi
@unittest.skipUnless(threading, 'Threading required for this test.')
class TestPendingCalls(unittest.TestCase):
def pendingcalls_submit(self, l, n):
def callback():
#this function can be interrupted by thread switching so let's
#use an atomic operation
l.append(None)
for i in range(n):
time.sleep(random.random()*0.02) #0.01 secs on average
#try submitting callback until successful.
#rely on regular interrupt to flush queue if we are
#unsuccessful.
while True:
if _testcapi._pending_threadfunc(callback):
break;
def pendingcalls_wait(self, l, n, context = None):
#now, stick around until l[0] has grown to 10
count = 0;
while len(l) != n:
#this busy loop is where we expect to be interrupted to
#run our callbacks. Note that callbacks are only run on the
#main thread
if False and test_support.verbose:
print "(%i)"%(len(l),),
for i in xrange(1000):
a = i*i
if context and not context.event.is_set():
continue
count += 1
self.assertTrue(count < 10000,
"timeout waiting for %i callbacks, got %i"%(n, len(l)))
if False and test_support.verbose:
print "(%i)"%(len(l),)
def test_pendingcalls_threaded(self):
#do every callback on a separate thread
n = 32 #total callbacks
threads = []
class foo(object):pass
context = foo()
context.l = []
context.n = 2 #submits per thread
context.nThreads = n // context.n
context.nFinished = 0
context.lock = threading.Lock()
context.event = threading.Event()
for i in range(context.nThreads):
t = threading.Thread(target=self.pendingcalls_thread, args = (context,))
t.start()
threads.append(t)
self.pendingcalls_wait(context.l, n, context)
for t in threads:
t.join()
def pendingcalls_thread(self, context):
try:
self.pendingcalls_submit(context.l, context.n)
finally:
with context.lock:
context.nFinished += 1
nFinished = context.nFinished
if False and test_support.verbose:
print "finished threads: ", nFinished
if nFinished == context.nThreads:
context.event.set()
def test_pendingcalls_non_threaded(self):
#again, just using the main thread, likely they will all be dispathced at
#once. It is ok to ask for too many, because we loop until we find a slot.
#the loop can be interrupted to dispatch.
#there are only 32 dispatch slots, so we go for twice that!
l = []
n = 64
self.pendingcalls_submit(l, n)
self.pendingcalls_wait(l, n)
def test_main():
for name in dir(_testcapi):
if name.startswith('test_'):
test = getattr(_testcapi, name)
if test_support.verbose:
print "internal", name
try:
test()
except _testcapi.error:
raise test_support.TestFailed, sys.exc_info()[1]
# some extra thread-state tests driven via _testcapi
def TestThreadState():
if test_support.verbose:
print "auto-thread-state"
idents = []
def callback():
idents.append(thread.get_ident())
_testcapi._test_thread_state(callback)
a = b = callback
time.sleep(1)
# Check our main thread is in the list exactly 3 times.
if idents.count(thread.get_ident()) != 3:
raise test_support.TestFailed, \
"Couldn't find main thread correctly in the list"
if threading:
import thread
import time
TestThreadState()
t=threading.Thread(target=TestThreadState)
t.start()
t.join()
test_support.run_unittest(TestPendingCalls)
if __name__ == "__main__":
test_main()
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