Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_capi.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 9bbb9ac061c0
children 6768b2350c57
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
16447
ac52d3727867 Renamed _testXXX to _testcapiXXX. Jack is my hero -- good call!
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1 # Run the _testcapi module tests (tests for the Python/C API): by defn,
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e526d9248965 Fix typo in comment (the module is now called _testcapi, not _test).
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2 # these are all functions _testcapi exports whose name begins with 'test_'.
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3
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4 from __future__ import with_statement
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5 import sys
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6 import time
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7 import random
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8 import unittest
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9 import threading
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10 from test import test_support
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11 import _testcapi
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12
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13 class TestPendingCalls(unittest.TestCase):
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14
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15 def pendingcalls_submit(self, l, n):
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16 def callback():
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17 #this function can be interrupted by thread switching so let's
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18 #use an atomic operation
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19 l.append(None)
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20
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21 for i in range(n):
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22 time.sleep(random.random()*0.02) #0.01 secs on average
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23 #try submitting callback until successful.
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24 #rely on regular interrupt to flush queue if we are
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25 #unsuccessful.
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26 while True:
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27 if _testcapi._pending_threadfunc(callback):
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28 break;
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29
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30 def pendingcalls_wait(self, l, n, context = None):
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31 #now, stick around until l[0] has grown to 10
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32 count = 0;
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33 while len(l) != n:
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34 #this busy loop is where we expect to be interrupted to
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35 #run our callbacks. Note that callbacks are only run on the
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36 #main thread
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37 if False and test_support.verbose:
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38 print "(%i)"%(len(l),),
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39 for i in xrange(1000):
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40 a = i*i
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41 if context and not context.event.is_set():
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42 continue
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43 count += 1
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44 self.failUnless(count < 10000,
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45 "timeout waiting for %i callbacks, got %i"%(n, len(l)))
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46 if False and test_support.verbose:
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47 print "(%i)"%(len(l),)
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48
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49 def test_pendingcalls_threaded(self):
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50
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51 #do every callback on a separate thread
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52 n = 32 #total callbacks
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53 threads = []
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54 class foo(object):pass
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55 context = foo()
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56 context.l = []
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57 context.n = 2 #submits per thread
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58 context.nThreads = n / context.n
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59 context.nFinished = 0
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60 context.lock = threading.Lock()
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61 context.event = threading.Event()
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62
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63 for i in range(context.nThreads):
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64 t = threading.Thread(target=self.pendingcalls_thread, args = (context,))
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65 t.start()
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66 threads.append(t)
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67
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68 self.pendingcalls_wait(context.l, n, context)
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69
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70 for t in threads:
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71 t.join()
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72
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73 def pendingcalls_thread(self, context):
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74 try:
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75 self.pendingcalls_submit(context.l, context.n)
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76 finally:
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77 with context.lock:
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78 context.nFinished += 1
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79 nFinished = context.nFinished
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80 if False and test_support.verbose:
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81 print "finished threads: ", nFinished
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82 if nFinished == context.nThreads:
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83 context.event.set()
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84
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85 def test_pendingcalls_non_threaded(self):
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86 #again, just using the main thread, likely they will all be dispathced at
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87 #once. It is ok to ask for too many, because we loop until we find a slot.
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88 #the loop can be interrupted to dispatch.
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89 #there are only 32 dispatch slots, so we go for twice that!
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90 l = []
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91 n = 64
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92 self.pendingcalls_submit(l, n)
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93 self.pendingcalls_wait(l, n)
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94
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95
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96 def test_main():
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97
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98 for name in dir(_testcapi):
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99 if name.startswith('test_'):
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100 test = getattr(_testcapi, name)
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101 if test_support.verbose:
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102 print "internal", name
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103 try:
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104 test()
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105 except _testcapi.error:
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106 raise test_support.TestFailed, sys.exc_info()[1]
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107
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108 # some extra thread-state tests driven via _testcapi
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109 def TestThreadState():
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110 if test_support.verbose:
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111 print "auto-thread-state"
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112
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113 idents = []
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114
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115 def callback():
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116 idents.append(thread.get_ident())
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117
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118 _testcapi._test_thread_state(callback)
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119 a = b = callback
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120 time.sleep(1)
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121 # Check our main thread is in the list exactly 3 times.
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122 if idents.count(thread.get_ident()) != 3:
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123 raise test_support.TestFailed, \
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124 "Couldn't find main thread correctly in the list"
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125
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126 try:
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127 _testcapi._test_thread_state
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128 have_thread_state = True
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129 except AttributeError:
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130 have_thread_state = False
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131
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132 if have_thread_state:
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133 import thread
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134 import time
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135 TestThreadState()
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136 import threading
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137 t=threading.Thread(target=TestThreadState)
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138 t.start()
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139 t.join()
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140
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141 test_support.run_unittest(TestPendingCalls)
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142
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143 if __name__ == "__main__":
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144 test_main()