Josh Gao | c62e49a | 2016-04-29 18:11:04 -0700 | [diff] [blame] | 1 | # Run the _testcapi module tests (tests for the Python/C API): by defn, |
| 2 | # these are all functions _testcapi exports whose name begins with 'test_'. |
| 3 | |
| 4 | from __future__ import with_statement |
| 5 | import sys |
| 6 | import time |
| 7 | import random |
| 8 | import unittest |
| 9 | from test import test_support |
| 10 | try: |
| 11 | import thread |
| 12 | import threading |
| 13 | except ImportError: |
| 14 | thread = None |
| 15 | threading = None |
| 16 | import _testcapi |
| 17 | |
| 18 | @unittest.skipUnless(threading, 'Threading required for this test.') |
| 19 | class TestPendingCalls(unittest.TestCase): |
| 20 | |
| 21 | def pendingcalls_submit(self, l, n): |
| 22 | def callback(): |
| 23 | #this function can be interrupted by thread switching so let's |
| 24 | #use an atomic operation |
| 25 | l.append(None) |
| 26 | |
| 27 | for i in range(n): |
| 28 | time.sleep(random.random()*0.02) #0.01 secs on average |
| 29 | #try submitting callback until successful. |
| 30 | #rely on regular interrupt to flush queue if we are |
| 31 | #unsuccessful. |
| 32 | while True: |
| 33 | if _testcapi._pending_threadfunc(callback): |
| 34 | break; |
| 35 | |
| 36 | def pendingcalls_wait(self, l, n, context = None): |
| 37 | #now, stick around until l[0] has grown to 10 |
| 38 | count = 0; |
| 39 | while len(l) != n: |
| 40 | #this busy loop is where we expect to be interrupted to |
| 41 | #run our callbacks. Note that callbacks are only run on the |
| 42 | #main thread |
| 43 | if False and test_support.verbose: |
| 44 | print "(%i)"%(len(l),), |
| 45 | for i in xrange(1000): |
| 46 | a = i*i |
| 47 | if context and not context.event.is_set(): |
| 48 | continue |
| 49 | count += 1 |
| 50 | self.assertTrue(count < 10000, |
| 51 | "timeout waiting for %i callbacks, got %i"%(n, len(l))) |
| 52 | if False and test_support.verbose: |
| 53 | print "(%i)"%(len(l),) |
| 54 | |
| 55 | def test_pendingcalls_threaded(self): |
| 56 | #do every callback on a separate thread |
| 57 | n = 32 #total callbacks |
| 58 | threads = [] |
| 59 | class foo(object):pass |
| 60 | context = foo() |
| 61 | context.l = [] |
| 62 | context.n = 2 #submits per thread |
| 63 | context.nThreads = n // context.n |
| 64 | context.nFinished = 0 |
| 65 | context.lock = threading.Lock() |
| 66 | context.event = threading.Event() |
| 67 | |
| 68 | for i in range(context.nThreads): |
| 69 | t = threading.Thread(target=self.pendingcalls_thread, args = (context,)) |
| 70 | t.start() |
| 71 | threads.append(t) |
| 72 | |
| 73 | self.pendingcalls_wait(context.l, n, context) |
| 74 | |
| 75 | for t in threads: |
| 76 | t.join() |
| 77 | |
| 78 | def pendingcalls_thread(self, context): |
| 79 | try: |
| 80 | self.pendingcalls_submit(context.l, context.n) |
| 81 | finally: |
| 82 | with context.lock: |
| 83 | context.nFinished += 1 |
| 84 | nFinished = context.nFinished |
| 85 | if False and test_support.verbose: |
| 86 | print "finished threads: ", nFinished |
| 87 | if nFinished == context.nThreads: |
| 88 | context.event.set() |
| 89 | |
| 90 | def test_pendingcalls_non_threaded(self): |
| 91 | #again, just using the main thread, likely they will all be dispatched at |
| 92 | #once. It is ok to ask for too many, because we loop until we find a slot. |
| 93 | #the loop can be interrupted to dispatch. |
| 94 | #there are only 32 dispatch slots, so we go for twice that! |
| 95 | l = [] |
| 96 | n = 64 |
| 97 | self.pendingcalls_submit(l, n) |
| 98 | self.pendingcalls_wait(l, n) |
| 99 | |
| 100 | |
| 101 | @unittest.skipUnless(threading and thread, 'Threading required for this test.') |
| 102 | class TestThreadState(unittest.TestCase): |
| 103 | |
| 104 | @test_support.reap_threads |
| 105 | def test_thread_state(self): |
| 106 | # some extra thread-state tests driven via _testcapi |
| 107 | def target(): |
| 108 | idents = [] |
| 109 | |
| 110 | def callback(): |
| 111 | idents.append(thread.get_ident()) |
| 112 | |
| 113 | _testcapi._test_thread_state(callback) |
| 114 | a = b = callback |
| 115 | time.sleep(1) |
| 116 | # Check our main thread is in the list exactly 3 times. |
| 117 | self.assertEqual(idents.count(thread.get_ident()), 3, |
| 118 | "Couldn't find main thread correctly in the list") |
| 119 | |
| 120 | target() |
| 121 | t = threading.Thread(target=target) |
| 122 | t.start() |
| 123 | t.join() |
| 124 | |
| 125 | |
| 126 | def test_main(): |
| 127 | for name in dir(_testcapi): |
| 128 | if name.startswith('test_'): |
| 129 | test = getattr(_testcapi, name) |
| 130 | if test_support.verbose: |
| 131 | print "internal", name |
| 132 | try: |
| 133 | test() |
| 134 | except _testcapi.error: |
| 135 | raise test_support.TestFailed, sys.exc_info()[1] |
| 136 | |
| 137 | test_support.run_unittest(TestPendingCalls, TestThreadState) |
| 138 | |
| 139 | if __name__ == "__main__": |
| 140 | test_main() |