Mercurial > cpython-lru_cache-weakref
annotate Lib/test/test_thread.py @ 51749:1408feec0084 3.0
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r69798 | benjamin.peterson | 2009-02-19 22:02:38 -0600 (Thu, 19 Feb 2009) | 13 lines
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r69769 | georg.brandl | 2009-02-19 02:30:06 -0600 (Thu, 19 Feb 2009) | 1 line
#5310, #3558: fix operator precedence table.
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r69776 | georg.brandl | 2009-02-19 10:34:51 -0600 (Thu, 19 Feb 2009) | 2 lines
#5317: update IronPython URL.
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| author | Benjamin Peterson <benjamin@python.org> |
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| date | Fri, 20 Feb 2009 04:05:32 +0000 |
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1 import os |
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2 import unittest |
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3 import random |
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4 from test import support |
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5 import _thread as thread |
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9 NUMTASKS = 10 |
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10 NUMTRIPS = 3 |
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12 _print_mutex = thread.allocate_lock() |
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14 def verbose_print(arg): |
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15 """Helper function for printing out debugging output.""" |
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16 if support.verbose: |
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17 with _print_mutex: |
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18 print(arg) |
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20 class BasicThreadTest(unittest.TestCase): |
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22 def setUp(self): |
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23 self.done_mutex = thread.allocate_lock() |
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24 self.done_mutex.acquire() |
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25 self.running_mutex = thread.allocate_lock() |
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26 self.random_mutex = thread.allocate_lock() |
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27 self.running = 0 |
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28 self.next_ident = 0 |
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31 class ThreadRunningTests(BasicThreadTest): |
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33 def newtask(self): |
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34 with self.running_mutex: |
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35 self.next_ident += 1 |
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36 verbose_print("creating task %s" % self.next_ident) |
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37 thread.start_new_thread(self.task, (self.next_ident,)) |
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38 self.running += 1 |
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39 |
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40 def task(self, ident): |
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41 with self.random_mutex: |
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42 delay = random.random() / 10000.0 |
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43 verbose_print("task %s will run for %sus" % (ident, round(delay*1e6))) |
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44 time.sleep(delay) |
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45 verbose_print("task %s done" % ident) |
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46 with self.running_mutex: |
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47 self.running -= 1 |
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48 if self.running == 0: |
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49 self.done_mutex.release() |
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51 def test_starting_threads(self): |
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52 # Basic test for thread creation. |
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53 for i in range(NUMTASKS): |
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54 self.newtask() |
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55 verbose_print("waiting for tasks to complete...") |
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56 self.done_mutex.acquire() |
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57 verbose_print("all tasks done") |
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59 def test_stack_size(self): |
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60 # Various stack size tests. |
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61 self.assertEquals(thread.stack_size(), 0, "intial stack size is not 0") |
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62 |
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63 thread.stack_size(0) |
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64 self.assertEquals(thread.stack_size(), 0, "stack_size not reset to default") |
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65 |
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66 if os.name not in ("nt", "os2", "posix"): |
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67 return |
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68 |
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69 tss_supported = True |
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70 try: |
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71 thread.stack_size(4096) |
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72 except ValueError: |
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73 verbose_print("caught expected ValueError setting " |
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74 "stack_size(4096)") |
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75 except thread.error: |
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76 tss_supported = False |
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77 verbose_print("platform does not support changing thread stack " |
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78 "size") |
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80 if tss_supported: |
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81 fail_msg = "stack_size(%d) failed - should succeed" |
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82 for tss in (262144, 0x100000, 0): |
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83 thread.stack_size(tss) |
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84 self.assertEquals(thread.stack_size(), tss, fail_msg % tss) |
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85 verbose_print("successfully set stack_size(%d)" % tss) |
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87 for tss in (262144, 0x100000): |
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88 verbose_print("trying stack_size = (%d)" % tss) |
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89 self.next_ident = 0 |
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90 for i in range(NUMTASKS): |
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91 self.newtask() |
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92 |
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93 verbose_print("waiting for all tasks to complete") |
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94 self.done_mutex.acquire() |
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95 verbose_print("all tasks done") |
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96 |
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97 thread.stack_size(0) |
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98 |
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99 |
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100 class Barrier: |
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101 def __init__(self, num_threads): |
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102 self.num_threads = num_threads |
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103 self.waiting = 0 |
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104 self.checkin_mutex = thread.allocate_lock() |
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105 self.checkout_mutex = thread.allocate_lock() |
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106 self.checkout_mutex.acquire() |
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107 |
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108 def enter(self): |
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109 self.checkin_mutex.acquire() |
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110 self.waiting = self.waiting + 1 |
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111 if self.waiting == self.num_threads: |
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112 self.waiting = self.num_threads - 1 |
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113 self.checkout_mutex.release() |
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114 return |
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115 self.checkin_mutex.release() |
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117 self.checkout_mutex.acquire() |
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118 self.waiting = self.waiting - 1 |
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119 if self.waiting == 0: |
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120 self.checkin_mutex.release() |
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121 return |
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122 self.checkout_mutex.release() |
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123 |
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125 class BarrierTest(BasicThreadTest): |
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126 |
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127 def test_barrier(self): |
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128 self.bar = Barrier(NUMTASKS) |
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129 self.running = NUMTASKS |
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130 for i in range(NUMTASKS): |
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131 thread.start_new_thread(self.task2, (i,)) |
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132 verbose_print("waiting for tasks to end") |
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133 self.done_mutex.acquire() |
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134 verbose_print("tasks done") |
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135 |
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136 def task2(self, ident): |
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137 for i in range(NUMTRIPS): |
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138 if ident == 0: |
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139 # give it a good chance to enter the next |
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140 # barrier before the others are all out |
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141 # of the current one |
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142 delay = 0 |
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143 else: |
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144 with self.random_mutex: |
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145 delay = random.random() / 10000.0 |
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146 verbose_print("task %s will run for %sus" % |
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147 (ident, round(delay * 1e6))) |
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148 time.sleep(delay) |
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149 verbose_print("task %s entering %s" % (ident, i)) |
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150 self.bar.enter() |
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151 verbose_print("task %s leaving barrier" % ident) |
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152 with self.running_mutex: |
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153 self.running -= 1 |
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154 # Must release mutex before releasing done, else the main thread can |
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155 # exit and set mutex to None as part of global teardown; then |
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156 # mutex.release() raises AttributeError. |
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157 finished = self.running == 0 |
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158 if finished: |
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159 self.done_mutex.release() |
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161 def test_main(): |
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162 support.run_unittest(ThreadRunningTests, BarrierTest) |
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163 |
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164 if __name__ == "__main__": |
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165 test_main() |