Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project 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 | #include "src/base/atomicops.h" |
| 6 | #include "src/base/platform/platform.h" |
| 7 | #include "src/cancelable-task.h" |
| 8 | #include "testing/gtest/include/gtest/gtest.h" |
| 9 | |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
| 14 | namespace { |
| 15 | |
| 16 | class TestTask : public Task, public Cancelable { |
| 17 | public: |
| 18 | enum Mode { kDoNothing, kWaitTillCanceledAgain, kCheckNotRun }; |
| 19 | |
| 20 | TestTask(CancelableTaskManager* parent, base::AtomicWord* result, |
| 21 | Mode mode = kDoNothing) |
| 22 | : Cancelable(parent), result_(result), mode_(mode) {} |
| 23 | |
| 24 | // Task overrides. |
| 25 | void Run() final { |
| 26 | if (TryRun()) { |
| 27 | RunInternal(); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | private: |
| 32 | void RunInternal() { |
| 33 | base::Release_Store(result_, id()); |
| 34 | |
| 35 | switch (mode_) { |
| 36 | case kWaitTillCanceledAgain: |
| 37 | // Simple busy wait until the main thread tried to cancel. |
| 38 | while (CancelAttempts() == 0) { |
| 39 | } |
| 40 | break; |
| 41 | case kCheckNotRun: |
| 42 | // Check that we never execute {RunInternal}. |
| 43 | EXPECT_TRUE(false); |
| 44 | break; |
| 45 | default: |
| 46 | break; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | base::AtomicWord* result_; |
| 51 | Mode mode_; |
| 52 | }; |
| 53 | |
| 54 | |
| 55 | class SequentialRunner { |
| 56 | public: |
| 57 | explicit SequentialRunner(TestTask* task) : task_(task) {} |
| 58 | |
| 59 | void Run() { |
| 60 | task_->Run(); |
| 61 | delete task_; |
| 62 | } |
| 63 | |
| 64 | private: |
| 65 | TestTask* task_; |
| 66 | }; |
| 67 | |
| 68 | |
| 69 | class ThreadedRunner final : public base::Thread { |
| 70 | public: |
| 71 | explicit ThreadedRunner(TestTask* task) |
| 72 | : Thread(Options("runner thread")), task_(task) {} |
| 73 | |
| 74 | virtual void Run() { |
| 75 | task_->Run(); |
| 76 | delete task_; |
| 77 | } |
| 78 | |
| 79 | private: |
| 80 | TestTask* task_; |
| 81 | }; |
| 82 | |
| 83 | |
| 84 | typedef base::AtomicWord ResultType; |
| 85 | |
| 86 | |
| 87 | intptr_t GetValue(ResultType* result) { return base::Acquire_Load(result); } |
| 88 | |
| 89 | } // namespace |
| 90 | |
| 91 | |
| 92 | TEST(CancelableTask, EmptyCancelableTaskManager) { |
| 93 | CancelableTaskManager manager; |
| 94 | manager.CancelAndWait(); |
| 95 | } |
| 96 | |
| 97 | |
| 98 | TEST(CancelableTask, SequentialCancelAndWait) { |
| 99 | CancelableTaskManager manager; |
| 100 | ResultType result1 = 0; |
| 101 | SequentialRunner runner1( |
| 102 | new TestTask(&manager, &result1, TestTask::kCheckNotRun)); |
| 103 | EXPECT_EQ(GetValue(&result1), 0); |
| 104 | manager.CancelAndWait(); |
| 105 | EXPECT_EQ(GetValue(&result1), 0); |
| 106 | runner1.Run(); // Run to avoid leaking the Task. |
| 107 | EXPECT_EQ(GetValue(&result1), 0); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | TEST(CancelableTask, SequentialMultipleTasks) { |
| 112 | CancelableTaskManager manager; |
| 113 | ResultType result1 = 0; |
| 114 | ResultType result2 = 0; |
| 115 | TestTask* task1 = new TestTask(&manager, &result1); |
| 116 | TestTask* task2 = new TestTask(&manager, &result2); |
| 117 | SequentialRunner runner1(task1); |
| 118 | SequentialRunner runner2(task2); |
| 119 | EXPECT_EQ(task1->id(), 1u); |
| 120 | EXPECT_EQ(task2->id(), 2u); |
| 121 | |
| 122 | EXPECT_EQ(GetValue(&result1), 0); |
| 123 | runner1.Run(); // Don't touch task1 after running it. |
| 124 | EXPECT_EQ(GetValue(&result1), 1); |
| 125 | |
| 126 | EXPECT_EQ(GetValue(&result2), 0); |
| 127 | runner2.Run(); // Don't touch task2 after running it. |
| 128 | EXPECT_EQ(GetValue(&result2), 2); |
| 129 | |
| 130 | manager.CancelAndWait(); |
| 131 | EXPECT_FALSE(manager.TryAbort(1)); |
| 132 | EXPECT_FALSE(manager.TryAbort(2)); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | TEST(CancelableTask, ThreadedMultipleTasksStarted) { |
| 137 | CancelableTaskManager manager; |
| 138 | ResultType result1 = 0; |
| 139 | ResultType result2 = 0; |
| 140 | TestTask* task1 = |
| 141 | new TestTask(&manager, &result1, TestTask::kWaitTillCanceledAgain); |
| 142 | TestTask* task2 = |
| 143 | new TestTask(&manager, &result2, TestTask::kWaitTillCanceledAgain); |
| 144 | ThreadedRunner runner1(task1); |
| 145 | ThreadedRunner runner2(task2); |
| 146 | runner1.Start(); |
| 147 | runner2.Start(); |
| 148 | // Busy wait on result to make sure both tasks are done. |
| 149 | while ((GetValue(&result1) == 0) || (GetValue(&result2) == 0)) { |
| 150 | } |
| 151 | manager.CancelAndWait(); |
| 152 | runner1.Join(); |
| 153 | runner2.Join(); |
| 154 | EXPECT_EQ(GetValue(&result1), 1); |
| 155 | EXPECT_EQ(GetValue(&result2), 2); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | TEST(CancelableTask, ThreadedMultipleTasksNotRun) { |
| 160 | CancelableTaskManager manager; |
| 161 | ResultType result1 = 0; |
| 162 | ResultType result2 = 0; |
| 163 | TestTask* task1 = new TestTask(&manager, &result1, TestTask::kCheckNotRun); |
| 164 | TestTask* task2 = new TestTask(&manager, &result2, TestTask::kCheckNotRun); |
| 165 | ThreadedRunner runner1(task1); |
| 166 | ThreadedRunner runner2(task2); |
| 167 | manager.CancelAndWait(); |
| 168 | // Tasks are canceled, hence the runner will bail out and not update result. |
| 169 | runner1.Start(); |
| 170 | runner2.Start(); |
| 171 | runner1.Join(); |
| 172 | runner2.Join(); |
| 173 | EXPECT_EQ(GetValue(&result1), 0); |
| 174 | EXPECT_EQ(GetValue(&result2), 0); |
| 175 | } |
| 176 | |
| 177 | |
| 178 | TEST(CancelableTask, RemoveBeforeCancelAndWait) { |
| 179 | CancelableTaskManager manager; |
| 180 | ResultType result1 = 0; |
| 181 | TestTask* task1 = new TestTask(&manager, &result1, TestTask::kCheckNotRun); |
| 182 | ThreadedRunner runner1(task1); |
| 183 | uint32_t id = task1->id(); |
| 184 | EXPECT_EQ(id, 1u); |
| 185 | EXPECT_TRUE(manager.TryAbort(id)); |
| 186 | runner1.Start(); |
| 187 | runner1.Join(); |
| 188 | manager.CancelAndWait(); |
| 189 | EXPECT_EQ(GetValue(&result1), 0); |
| 190 | } |
| 191 | |
| 192 | |
| 193 | TEST(CancelableTask, RemoveAfterCancelAndWait) { |
| 194 | CancelableTaskManager manager; |
| 195 | ResultType result1 = 0; |
| 196 | TestTask* task1 = new TestTask(&manager, &result1); |
| 197 | ThreadedRunner runner1(task1); |
| 198 | uint32_t id = task1->id(); |
| 199 | EXPECT_EQ(id, 1u); |
| 200 | runner1.Start(); |
| 201 | runner1.Join(); |
| 202 | manager.CancelAndWait(); |
| 203 | EXPECT_FALSE(manager.TryAbort(id)); |
| 204 | EXPECT_EQ(GetValue(&result1), 1); |
| 205 | } |
| 206 | |
| 207 | |
| 208 | TEST(CancelableTask, RemoveUnmanagedId) { |
| 209 | CancelableTaskManager manager; |
| 210 | EXPECT_FALSE(manager.TryAbort(1)); |
| 211 | EXPECT_FALSE(manager.TryAbort(2)); |
| 212 | manager.CancelAndWait(); |
| 213 | EXPECT_FALSE(manager.TryAbort(1)); |
| 214 | EXPECT_FALSE(manager.TryAbort(3)); |
| 215 | } |
| 216 | |
| 217 | } // namespace internal |
| 218 | } // namespace v8 |