1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
|
"""
Test toro.RWLock.
"""
from functools import partial
from random import randint
from datetime import timedelta
import time
from tornado import gen
from tornado.testing import gen_test, AsyncTestCase
import toro
from test import make_callback, assert_raises, ContextManagerTestsMixin
# Adapted from toro.test_lock.py
class RWLockReadTests(AsyncTestCase):
def test_acquire_release(self):
lock = toro.RWLock(max_readers=1)
self.assertFalse(lock.locked())
self.assertTrue(lock.acquire_read().done())
self.assertTrue(lock.locked())
lock.release_read()
self.assertFalse(lock.locked())
def test_release_unlocked(self):
lock = toro.RWLock(max_readers=1)
with assert_raises(RuntimeError):
lock.release_read()
@gen_test
def test_acquire_contended(self):
lock = toro.RWLock(max_readers=1)
self.assertTrue(lock.acquire_read().done())
N = 5
@gen.coroutine
def f():
yield lock.acquire_read()
lock.release_read()
futures = [f() for _ in range(N)]
lock.release_read()
yield futures
@gen_test
def test_reacquire(self):
# Lock needs to be released before re-acquiring.
lock = toro.RWLock(max_readers=1)
phase = []
@gen.coroutine
def f():
yield lock.acquire_read()
self.assertTrue(lock.locked())
phase.append(None)
yield lock.acquire_read()
self.assertTrue(lock.locked())
phase.append(None)
future = f()
while len(phase) == 0:
yield gen.Task(self.io_loop.add_callback)
self.assertEqual(len(phase), 1)
lock.release_read()
yield future
self.assertEqual(len(phase), 2)
# Adapted from toro.test_lock.py
class RWLockWriteTests(AsyncTestCase):
@gen_test
def test_acquire_release(self):
lock = toro.RWLock(max_readers=10)
self.assertFalse(lock.locked())
yield lock.acquire_write()
self.assertTrue(lock.locked())
lock.release_write()
self.assertFalse(lock.locked())
@gen_test
def test_acquire_contended(self):
lock = toro.RWLock(max_readers=10)
yield lock.acquire_write()
N = 5
@gen.coroutine
def f():
yield lock.acquire_write()
lock.release_write()
futures = [f() for _ in range(N)]
lock.release_write()
yield futures
@gen_test
def test_reacquire(self):
# Lock needs to be released before re-acquiring.
lock = toro.RWLock(max_readers=10)
phase = []
@gen.coroutine
def f():
yield lock.acquire_write()
self.assertTrue(lock.locked())
phase.append(None)
yield lock.acquire_write()
self.assertTrue(lock.locked())
phase.append(None)
future = f()
while len(phase) == 0:
yield gen.Task(self.io_loop.add_callback)
self.assertEqual(len(phase), 1)
lock.release_write()
yield future
self.assertEqual(len(phase), 2)
# Adapted from toro.test_lock.py
class RWLockReadTests2(AsyncTestCase):
def test_str(self):
lock = toro.RWLock(max_readers=1)
# No errors in various states.
str(lock)
lock.acquire_read()
str(lock)
@gen_test
def test_acquire_timeout(self):
lock = toro.RWLock(max_readers=1)
self.assertTrue(lock.acquire_read().done())
self.assertTrue(lock.locked())
st = time.time()
with assert_raises(toro.Timeout):
yield lock.acquire_read(deadline=timedelta(seconds=0.1))
duration = time.time() - st
self.assertAlmostEqual(0.1, duration, places=1)
self.assertTrue(lock.locked())
@gen_test
def test_acquire_callback(self):
lock = toro.RWLock(max_readers=1)
history = []
lock.acquire_read().add_done_callback(make_callback('acq1', history))
lock.acquire_read().add_done_callback(make_callback('acq2', history))
lock.release_read()
history.append('release')
self.assertEqual(['acq1', 'acq2', 'release'], history)
def test_multi_release(self):
lock = toro.RWLock(max_readers=1)
lock.acquire_read()
lock.release_read()
self.assertRaises(RuntimeError, lock.release_read)
# Adapted from toro.test_lock.py
class RWLockWriteTests2(AsyncTestCase):
def test_str(self):
lock = toro.RWLock(max_readers=10)
# No errors in various states.
str(lock)
lock.acquire_write()
str(lock)
@gen_test
def test_acquire_timeout(self):
lock = toro.RWLock(max_readers=10)
yield lock.acquire_write()
self.assertTrue(lock.locked())
st = time.time()
with assert_raises(toro.Timeout):
yield lock.acquire_write(deadline=timedelta(seconds=0.1))
duration = time.time() - st
self.assertAlmostEqual(0.1, duration, places=1)
self.assertTrue(lock.locked())
@gen_test
def test_acquire_callback(self):
lock = toro.RWLock(max_readers=10)
history = []
lock.acquire_write().add_done_callback(make_callback('acq1', history))
future = lock.acquire_write()
future.add_done_callback(make_callback('acq2', history))
lock.release_write()
yield future
history.append('release')
self.assertEqual(['acq1', 'acq2', 'release'], history)
def test_multi_release(self):
lock = toro.RWLock(max_readers=10)
lock.acquire_write()
lock.release_write()
self.assertRaises(RuntimeError, lock.release_write)
class RWLockWithReadDefault(toro.RWLock):
def acquire(self, *args, **kwargs):
return self.acquire_read(*args, **kwargs)
class RWLockWithWriteDefault(toro.RWLock):
@gen.coroutine
def acquire(self, *args, **kwargs):
raise gen.Return((yield self.acquire_write(*args, **kwargs)))
# Adapted from toro.test_lock.py
class RWLockWithReadDefaultContextManagerTest(ContextManagerTestsMixin,
AsyncTestCase):
toro_class = RWLockWithReadDefault
# Adapted from toro.test_lock.py
class RWLockWithWriteDefaultContextManagerTest(ContextManagerTestsMixin,
AsyncTestCase):
toro_class = RWLockWithWriteDefault
# Adapted from toro.test_lock.py
class RWLockWithWriteMultipleReadersContextManagerTest(ContextManagerTestsMixin,
AsyncTestCase):
toro_class = partial(RWLockWithWriteDefault, max_readers=10)
# Not adapted from toro lock tests, written just for RWLock
class RWLockTests3(AsyncTestCase):
@gen_test
def test_read_lock(self):
MAX_READERS = randint(2, 10)
lock = toro.RWLock(max_readers=MAX_READERS)
for i in range(MAX_READERS):
self.assertFalse(lock.locked())
yield lock.acquire_read()
self.assertTrue(lock.locked())
@gen_test
def test_write_lock(self):
MAX_READERS = randint(2, 10)
lock = toro.RWLock(max_readers=MAX_READERS)
self.assertFalse(lock.locked())
yield lock.acquire_write()
self.assertTrue(lock.locked())
@gen_test
def test_reacquire(self):
MAX_READERS = randint(2, 10)
# Lock needs to be released before re-acquiring.
lock = toro.RWLock(max_readers=MAX_READERS)
phase = []
@gen.coroutine
def f():
yield lock.acquire_read()
self.assertFalse(lock.locked())
phase.append(None)
yield lock.acquire_write()
self.assertTrue(lock.locked())
phase.append(None)
future = f()
while len(phase) == 0:
yield gen.Task(self.io_loop.add_callback)
self.assertEqual(len(phase), 1)
lock.release_read()
yield future
self.assertEqual(len(phase), 2)
@gen_test
def test_reacquire_concurrent(self):
MAX_READERS = 10
# Lock needs to be released before re-acquiring.
lock = toro.RWLock(max_readers=MAX_READERS)
phase = []
@gen.coroutine
def f():
for _ in range(MAX_READERS):
yield lock.acquire_read()
self.assertTrue(lock.locked())
phase.append(None)
# concurrent acquire_write
yield [lock.acquire_write(), lock.acquire_write()]
self.assertTrue(lock.locked())
phase.append(None)
future = f()
while len(phase) == 0:
yield gen.Task(self.io_loop.add_callback)
self.assertEqual(len(phase), 1)
for i in range(MAX_READERS):
lock.release_read()
lock.release_write()
yield future
self.assertEqual(len(phase), 2)
@gen_test
def test_read_context_managers(self):
MAX_READERS = 2
lock = toro.RWLock(max_readers=MAX_READERS)
self.assertFalse(lock.locked())
with (yield lock.acquire_read()):
self.assertFalse(lock.locked())
with (yield lock.acquire_read()):
self.assertTrue(lock.locked())
self.assertFalse(lock.locked())
self.assertFalse(lock.locked())
@gen_test
def test_write_context_managers(self):
MAX_READERS = randint(2, 10)
lock = toro.RWLock(max_readers=MAX_READERS)
self.assertFalse(lock.locked())
with (yield lock.acquire_write()):
self.assertTrue(lock.locked())
self.assertFalse(lock.locked())
@gen_test
def test_write_acquire_timeout(self):
MAX_READERS = randint(2, 10)
lock = toro.RWLock(max_readers=MAX_READERS)
yield lock.acquire_write()
self.assertTrue(lock.locked())
st = time.time()
with assert_raises(toro.Timeout):
yield lock.acquire_write(deadline=timedelta(seconds=0.1))
duration = time.time() - st
self.assertAlmostEqual(0.1, duration, places=1)
self.assertTrue(lock.locked())
@gen_test
def test_partial_release(self):
lock = toro.RWLock(max_readers=5)
N = 5
for i in range(N):
yield lock.acquire_read()
for i in range(N):
lock.release_read()
yield lock.acquire_write()
lock.release_write()
@gen_test
def test_release_unlocked(self):
lock = toro.RWLock(max_readers=5)
N = 5
for i in range(N):
yield lock.acquire_read()
for i in range(N):
lock.release_read()
with assert_raises(RuntimeError):
lock.release_read()
|
