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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // NOTE(vtl): Some of these tests are inherently flaky (e.g., if run on a | |
| 6 // heavily-loaded system). Sorry. |test::EpsilonDeadline()| may be increased to | |
| 7 // increase tolerance and reduce observed flakiness (though doing so reduces the | |
| 8 // meaningfulness of the test). | |
| 9 | |
| 10 #include "mojo/edk/system/waiter.h" | |
| 11 | |
| 12 #include <stdint.h> | |
| 13 | |
| 14 #include "base/macros.h" | |
| 15 #include "base/synchronization/lock.h" | |
| 16 #include "base/threading/simple_thread.h" | |
| 17 #include "mojo/edk/system/test_utils.h" | |
| 18 #include "testing/gtest/include/gtest/gtest.h" | |
| 19 | |
| 20 namespace mojo { | |
| 21 namespace edk { | |
| 22 namespace { | |
| 23 | |
| 24 const unsigned kPollTimeMs = 10; | |
| 25 | |
| 26 class WaitingThread : public base::SimpleThread { | |
| 27 public: | |
| 28 explicit WaitingThread(MojoDeadline deadline) | |
| 29 : base::SimpleThread("waiting_thread"), | |
| 30 deadline_(deadline), | |
| 31 done_(false), | |
| 32 result_(MOJO_RESULT_UNKNOWN), | |
| 33 context_(static_cast<uintptr_t>(-1)) { | |
| 34 waiter_.Init(); | |
| 35 } | |
| 36 | |
| 37 ~WaitingThread() override { Join(); } | |
| 38 | |
| 39 void WaitUntilDone(MojoResult* result, | |
| 40 uintptr_t* context, | |
| 41 MojoDeadline* elapsed) { | |
| 42 for (;;) { | |
| 43 { | |
| 44 base::AutoLock locker(lock_); | |
| 45 if (done_) { | |
| 46 *result = result_; | |
| 47 *context = context_; | |
| 48 *elapsed = elapsed_; | |
| 49 break; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 test::Sleep(test::DeadlineFromMilliseconds(kPollTimeMs)); | |
| 54 } | |
| 55 } | |
| 56 | |
| 57 Waiter* waiter() { return &waiter_; } | |
| 58 | |
| 59 private: | |
| 60 void Run() override { | |
| 61 test::Stopwatch stopwatch; | |
| 62 MojoResult result; | |
| 63 uintptr_t context = static_cast<uintptr_t>(-1); | |
| 64 MojoDeadline elapsed; | |
| 65 | |
| 66 stopwatch.Start(); | |
| 67 result = waiter_.Wait(deadline_, &context); | |
| 68 elapsed = stopwatch.Elapsed(); | |
| 69 | |
| 70 { | |
| 71 base::AutoLock locker(lock_); | |
| 72 done_ = true; | |
| 73 result_ = result; | |
| 74 context_ = context; | |
| 75 elapsed_ = elapsed; | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 const MojoDeadline deadline_; | |
| 80 Waiter waiter_; // Thread-safe. | |
| 81 | |
| 82 base::Lock lock_; // Protects the following members. | |
| 83 bool done_; | |
| 84 MojoResult result_; | |
| 85 uintptr_t context_; | |
| 86 MojoDeadline elapsed_; | |
| 87 | |
| 88 DISALLOW_COPY_AND_ASSIGN(WaitingThread); | |
| 89 }; | |
| 90 | |
| 91 TEST(WaiterTest, Basic) { | |
| 92 MojoResult result; | |
| 93 uintptr_t context; | |
| 94 MojoDeadline elapsed; | |
| 95 | |
| 96 // Finite deadline. | |
| 97 | |
| 98 // Awake immediately after thread start. | |
| 99 { | |
| 100 WaitingThread thread(10 * test::EpsilonDeadline()); | |
| 101 thread.Start(); | |
| 102 thread.waiter()->Awake(MOJO_RESULT_OK, 1); | |
| 103 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 104 EXPECT_EQ(MOJO_RESULT_OK, result); | |
| 105 EXPECT_EQ(1u, context); | |
| 106 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 107 } | |
| 108 | |
| 109 // Awake before after thread start. | |
| 110 { | |
| 111 WaitingThread thread(10 * test::EpsilonDeadline()); | |
| 112 thread.waiter()->Awake(MOJO_RESULT_CANCELLED, 2); | |
| 113 thread.Start(); | |
| 114 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 115 EXPECT_EQ(MOJO_RESULT_CANCELLED, result); | |
| 116 EXPECT_EQ(2u, context); | |
| 117 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 118 } | |
| 119 | |
| 120 // Awake some time after thread start. | |
| 121 { | |
| 122 WaitingThread thread(10 * test::EpsilonDeadline()); | |
| 123 thread.Start(); | |
| 124 test::Sleep(2 * test::EpsilonDeadline()); | |
| 125 thread.waiter()->Awake(1, 3); | |
| 126 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 127 EXPECT_EQ(1u, result); | |
| 128 EXPECT_EQ(3u, context); | |
| 129 EXPECT_GT(elapsed, (2 - 1) * test::EpsilonDeadline()); | |
| 130 EXPECT_LT(elapsed, (2 + 1) * test::EpsilonDeadline()); | |
| 131 } | |
| 132 | |
| 133 // Awake some longer time after thread start. | |
| 134 { | |
| 135 WaitingThread thread(10 * test::EpsilonDeadline()); | |
| 136 thread.Start(); | |
| 137 test::Sleep(5 * test::EpsilonDeadline()); | |
| 138 thread.waiter()->Awake(2, 4); | |
| 139 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 140 EXPECT_EQ(2u, result); | |
| 141 EXPECT_EQ(4u, context); | |
| 142 EXPECT_GT(elapsed, (5 - 1) * test::EpsilonDeadline()); | |
| 143 EXPECT_LT(elapsed, (5 + 1) * test::EpsilonDeadline()); | |
| 144 } | |
| 145 | |
| 146 // Don't awake -- time out (on another thread). | |
| 147 { | |
| 148 WaitingThread thread(2 * test::EpsilonDeadline()); | |
| 149 thread.Start(); | |
| 150 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 151 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, result); | |
| 152 EXPECT_EQ(static_cast<uintptr_t>(-1), context); | |
| 153 EXPECT_GT(elapsed, (2 - 1) * test::EpsilonDeadline()); | |
| 154 EXPECT_LT(elapsed, (2 + 1) * test::EpsilonDeadline()); | |
| 155 } | |
| 156 | |
| 157 // No (indefinite) deadline. | |
| 158 | |
| 159 // Awake immediately after thread start. | |
| 160 { | |
| 161 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 162 thread.Start(); | |
| 163 thread.waiter()->Awake(MOJO_RESULT_OK, 5); | |
| 164 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 165 EXPECT_EQ(MOJO_RESULT_OK, result); | |
| 166 EXPECT_EQ(5u, context); | |
| 167 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 168 } | |
| 169 | |
| 170 // Awake before after thread start. | |
| 171 { | |
| 172 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 173 thread.waiter()->Awake(MOJO_RESULT_CANCELLED, 6); | |
| 174 thread.Start(); | |
| 175 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 176 EXPECT_EQ(MOJO_RESULT_CANCELLED, result); | |
| 177 EXPECT_EQ(6u, context); | |
| 178 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 179 } | |
| 180 | |
| 181 // Awake some time after thread start. | |
| 182 { | |
| 183 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 184 thread.Start(); | |
| 185 test::Sleep(2 * test::EpsilonDeadline()); | |
| 186 thread.waiter()->Awake(1, 7); | |
| 187 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 188 EXPECT_EQ(1u, result); | |
| 189 EXPECT_EQ(7u, context); | |
| 190 EXPECT_GT(elapsed, (2 - 1) * test::EpsilonDeadline()); | |
| 191 EXPECT_LT(elapsed, (2 + 1) * test::EpsilonDeadline()); | |
| 192 } | |
| 193 | |
| 194 // Awake some longer time after thread start. | |
| 195 { | |
| 196 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 197 thread.Start(); | |
| 198 test::Sleep(5 * test::EpsilonDeadline()); | |
| 199 thread.waiter()->Awake(2, 8); | |
| 200 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 201 EXPECT_EQ(2u, result); | |
| 202 EXPECT_EQ(8u, context); | |
| 203 EXPECT_GT(elapsed, (5 - 1) * test::EpsilonDeadline()); | |
| 204 EXPECT_LT(elapsed, (5 + 1) * test::EpsilonDeadline()); | |
| 205 } | |
| 206 } | |
| 207 | |
| 208 TEST(WaiterTest, TimeOut) { | |
| 209 test::Stopwatch stopwatch; | |
| 210 MojoDeadline elapsed; | |
| 211 | |
| 212 Waiter waiter; | |
| 213 uintptr_t context = 123; | |
| 214 | |
| 215 waiter.Init(); | |
| 216 stopwatch.Start(); | |
| 217 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, waiter.Wait(0, &context)); | |
| 218 elapsed = stopwatch.Elapsed(); | |
| 219 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 220 EXPECT_EQ(123u, context); | |
| 221 | |
| 222 waiter.Init(); | |
| 223 stopwatch.Start(); | |
| 224 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, | |
| 225 waiter.Wait(2 * test::EpsilonDeadline(), &context)); | |
| 226 elapsed = stopwatch.Elapsed(); | |
| 227 EXPECT_GT(elapsed, (2 - 1) * test::EpsilonDeadline()); | |
| 228 EXPECT_LT(elapsed, (2 + 1) * test::EpsilonDeadline()); | |
| 229 EXPECT_EQ(123u, context); | |
| 230 | |
| 231 waiter.Init(); | |
| 232 stopwatch.Start(); | |
| 233 EXPECT_EQ(MOJO_RESULT_DEADLINE_EXCEEDED, | |
| 234 waiter.Wait(5 * test::EpsilonDeadline(), &context)); | |
| 235 elapsed = stopwatch.Elapsed(); | |
| 236 EXPECT_GT(elapsed, (5 - 1) * test::EpsilonDeadline()); | |
| 237 EXPECT_LT(elapsed, (5 + 1) * test::EpsilonDeadline()); | |
| 238 EXPECT_EQ(123u, context); | |
| 239 } | |
| 240 | |
| 241 // The first |Awake()| should always win. | |
| 242 TEST(WaiterTest, MultipleAwakes) { | |
| 243 MojoResult result; | |
| 244 uintptr_t context; | |
| 245 MojoDeadline elapsed; | |
| 246 | |
| 247 { | |
| 248 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 249 thread.Start(); | |
| 250 thread.waiter()->Awake(MOJO_RESULT_OK, 1); | |
| 251 thread.waiter()->Awake(1, 2); | |
| 252 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 253 EXPECT_EQ(MOJO_RESULT_OK, result); | |
| 254 EXPECT_EQ(1u, context); | |
| 255 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 256 } | |
| 257 | |
| 258 { | |
| 259 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 260 thread.waiter()->Awake(1, 3); | |
| 261 thread.Start(); | |
| 262 thread.waiter()->Awake(MOJO_RESULT_OK, 4); | |
| 263 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 264 EXPECT_EQ(1u, result); | |
| 265 EXPECT_EQ(3u, context); | |
| 266 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 267 } | |
| 268 | |
| 269 { | |
| 270 WaitingThread thread(MOJO_DEADLINE_INDEFINITE); | |
| 271 thread.Start(); | |
| 272 thread.waiter()->Awake(10, 5); | |
| 273 test::Sleep(2 * test::EpsilonDeadline()); | |
| 274 thread.waiter()->Awake(20, 6); | |
| 275 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 276 EXPECT_EQ(10u, result); | |
| 277 EXPECT_EQ(5u, context); | |
| 278 EXPECT_LT(elapsed, test::EpsilonDeadline()); | |
| 279 } | |
| 280 | |
| 281 { | |
| 282 WaitingThread thread(10 * test::EpsilonDeadline()); | |
| 283 thread.Start(); | |
| 284 test::Sleep(1 * test::EpsilonDeadline()); | |
| 285 thread.waiter()->Awake(MOJO_RESULT_FAILED_PRECONDITION, 7); | |
| 286 test::Sleep(2 * test::EpsilonDeadline()); | |
| 287 thread.waiter()->Awake(MOJO_RESULT_OK, 8); | |
| 288 thread.WaitUntilDone(&result, &context, &elapsed); | |
| 289 EXPECT_EQ(MOJO_RESULT_FAILED_PRECONDITION, result); | |
| 290 EXPECT_EQ(7u, context); | |
| 291 EXPECT_GT(elapsed, (1 - 1) * test::EpsilonDeadline()); | |
| 292 EXPECT_LT(elapsed, (1 + 1) * test::EpsilonDeadline()); | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 } // namespace | |
| 297 } // namespace edk | |
| 298 } // namespace mojo | |
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Chromium Code Reviews
Issue 2744943002:
Mojo: Move waiting APIs to public library (Closed)
