Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2014 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/platform/condition-variable.h" |
| 6 | |
| 7 | #include "src/base/platform/platform.h" |
| 8 | #include "src/base/platform/time.h" |
| 9 | #include "testing/gtest/include/gtest/gtest.h" |
| 10 | |
| 11 | namespace v8 { |
| 12 | namespace base { |
| 13 | |
| 14 | TEST(ConditionVariable, WaitForAfterNofityOnSameThread) { |
| 15 | for (int n = 0; n < 10; ++n) { |
| 16 | Mutex mutex; |
| 17 | ConditionVariable cv; |
| 18 | |
| 19 | LockGuard<Mutex> lock_guard(&mutex); |
| 20 | |
| 21 | cv.NotifyOne(); |
| 22 | EXPECT_FALSE(cv.WaitFor(&mutex, TimeDelta::FromMicroseconds(n))); |
| 23 | |
| 24 | cv.NotifyAll(); |
| 25 | EXPECT_FALSE(cv.WaitFor(&mutex, TimeDelta::FromMicroseconds(n))); |
| 26 | } |
| 27 | } |
| 28 | |
| 29 | |
| 30 | namespace { |
| 31 | |
| 32 | class ThreadWithMutexAndConditionVariable FINAL : public Thread { |
| 33 | public: |
| 34 | ThreadWithMutexAndConditionVariable() |
| 35 | : Thread(Options("ThreadWithMutexAndConditionVariable")), |
| 36 | running_(false), |
| 37 | finished_(false) {} |
| 38 | virtual ~ThreadWithMutexAndConditionVariable() {} |
| 39 | |
| 40 | virtual void Run() OVERRIDE { |
| 41 | LockGuard<Mutex> lock_guard(&mutex_); |
| 42 | running_ = true; |
| 43 | cv_.NotifyOne(); |
| 44 | while (running_) { |
| 45 | cv_.Wait(&mutex_); |
| 46 | } |
| 47 | finished_ = true; |
| 48 | cv_.NotifyAll(); |
| 49 | } |
| 50 | |
| 51 | bool running_; |
| 52 | bool finished_; |
| 53 | ConditionVariable cv_; |
| 54 | Mutex mutex_; |
| 55 | }; |
| 56 | |
| 57 | } // namespace |
| 58 | |
| 59 | |
| 60 | TEST(ConditionVariable, MultipleThreadsWithSeparateConditionVariables) { |
| 61 | static const int kThreadCount = 128; |
| 62 | ThreadWithMutexAndConditionVariable threads[kThreadCount]; |
| 63 | |
| 64 | for (int n = 0; n < kThreadCount; ++n) { |
| 65 | LockGuard<Mutex> lock_guard(&threads[n].mutex_); |
| 66 | EXPECT_FALSE(threads[n].running_); |
| 67 | EXPECT_FALSE(threads[n].finished_); |
| 68 | threads[n].Start(); |
| 69 | // Wait for nth thread to start. |
| 70 | while (!threads[n].running_) { |
| 71 | threads[n].cv_.Wait(&threads[n].mutex_); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | for (int n = kThreadCount - 1; n >= 0; --n) { |
| 76 | LockGuard<Mutex> lock_guard(&threads[n].mutex_); |
| 77 | EXPECT_TRUE(threads[n].running_); |
| 78 | EXPECT_FALSE(threads[n].finished_); |
| 79 | } |
| 80 | |
| 81 | for (int n = 0; n < kThreadCount; ++n) { |
| 82 | LockGuard<Mutex> lock_guard(&threads[n].mutex_); |
| 83 | EXPECT_TRUE(threads[n].running_); |
| 84 | EXPECT_FALSE(threads[n].finished_); |
| 85 | // Tell the nth thread to quit. |
| 86 | threads[n].running_ = false; |
| 87 | threads[n].cv_.NotifyOne(); |
| 88 | } |
| 89 | |
| 90 | for (int n = kThreadCount - 1; n >= 0; --n) { |
| 91 | // Wait for nth thread to quit. |
| 92 | LockGuard<Mutex> lock_guard(&threads[n].mutex_); |
| 93 | while (!threads[n].finished_) { |
| 94 | threads[n].cv_.Wait(&threads[n].mutex_); |
| 95 | } |
| 96 | EXPECT_FALSE(threads[n].running_); |
| 97 | EXPECT_TRUE(threads[n].finished_); |
| 98 | } |
| 99 | |
| 100 | for (int n = 0; n < kThreadCount; ++n) { |
| 101 | threads[n].Join(); |
| 102 | LockGuard<Mutex> lock_guard(&threads[n].mutex_); |
| 103 | EXPECT_FALSE(threads[n].running_); |
| 104 | EXPECT_TRUE(threads[n].finished_); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | |
| 109 | namespace { |
| 110 | |
| 111 | class ThreadWithSharedMutexAndConditionVariable FINAL : public Thread { |
| 112 | public: |
| 113 | ThreadWithSharedMutexAndConditionVariable() |
| 114 | : Thread(Options("ThreadWithSharedMutexAndConditionVariable")), |
| 115 | running_(false), |
| 116 | finished_(false), |
| 117 | cv_(NULL), |
| 118 | mutex_(NULL) {} |
| 119 | virtual ~ThreadWithSharedMutexAndConditionVariable() {} |
| 120 | |
| 121 | virtual void Run() OVERRIDE { |
| 122 | LockGuard<Mutex> lock_guard(mutex_); |
| 123 | running_ = true; |
| 124 | cv_->NotifyAll(); |
| 125 | while (running_) { |
| 126 | cv_->Wait(mutex_); |
| 127 | } |
| 128 | finished_ = true; |
| 129 | cv_->NotifyAll(); |
| 130 | } |
| 131 | |
| 132 | bool running_; |
| 133 | bool finished_; |
| 134 | ConditionVariable* cv_; |
| 135 | Mutex* mutex_; |
| 136 | }; |
| 137 | |
| 138 | } // namespace |
| 139 | |
| 140 | |
| 141 | TEST(ConditionVariable, MultipleThreadsWithSharedSeparateConditionVariables) { |
| 142 | static const int kThreadCount = 128; |
| 143 | ThreadWithSharedMutexAndConditionVariable threads[kThreadCount]; |
| 144 | ConditionVariable cv; |
| 145 | Mutex mutex; |
| 146 | |
| 147 | for (int n = 0; n < kThreadCount; ++n) { |
| 148 | threads[n].mutex_ = &mutex; |
| 149 | threads[n].cv_ = &cv; |
| 150 | } |
| 151 | |
| 152 | // Start all threads. |
| 153 | { |
| 154 | LockGuard<Mutex> lock_guard(&mutex); |
| 155 | for (int n = 0; n < kThreadCount; ++n) { |
| 156 | EXPECT_FALSE(threads[n].running_); |
| 157 | EXPECT_FALSE(threads[n].finished_); |
| 158 | threads[n].Start(); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | // Wait for all threads to start. |
| 163 | { |
| 164 | LockGuard<Mutex> lock_guard(&mutex); |
| 165 | for (int n = kThreadCount - 1; n >= 0; --n) { |
| 166 | while (!threads[n].running_) { |
| 167 | cv.Wait(&mutex); |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | // Make sure that all threads are running. |
| 173 | { |
| 174 | LockGuard<Mutex> lock_guard(&mutex); |
| 175 | for (int n = 0; n < kThreadCount; ++n) { |
| 176 | EXPECT_TRUE(threads[n].running_); |
| 177 | EXPECT_FALSE(threads[n].finished_); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | // Tell all threads to quit. |
| 182 | { |
| 183 | LockGuard<Mutex> lock_guard(&mutex); |
| 184 | for (int n = kThreadCount - 1; n >= 0; --n) { |
| 185 | EXPECT_TRUE(threads[n].running_); |
| 186 | EXPECT_FALSE(threads[n].finished_); |
| 187 | // Tell the nth thread to quit. |
| 188 | threads[n].running_ = false; |
| 189 | } |
| 190 | cv.NotifyAll(); |
| 191 | } |
| 192 | |
| 193 | // Wait for all threads to quit. |
| 194 | { |
| 195 | LockGuard<Mutex> lock_guard(&mutex); |
| 196 | for (int n = 0; n < kThreadCount; ++n) { |
| 197 | while (!threads[n].finished_) { |
| 198 | cv.Wait(&mutex); |
| 199 | } |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | // Make sure all threads are finished. |
| 204 | { |
| 205 | LockGuard<Mutex> lock_guard(&mutex); |
| 206 | for (int n = kThreadCount - 1; n >= 0; --n) { |
| 207 | EXPECT_FALSE(threads[n].running_); |
| 208 | EXPECT_TRUE(threads[n].finished_); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | // Join all threads. |
| 213 | for (int n = 0; n < kThreadCount; ++n) { |
| 214 | threads[n].Join(); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | |
| 219 | namespace { |
| 220 | |
| 221 | class LoopIncrementThread FINAL : public Thread { |
| 222 | public: |
| 223 | LoopIncrementThread(int rem, int* counter, int limit, int thread_count, |
| 224 | ConditionVariable* cv, Mutex* mutex) |
| 225 | : Thread(Options("LoopIncrementThread")), |
| 226 | rem_(rem), |
| 227 | counter_(counter), |
| 228 | limit_(limit), |
| 229 | thread_count_(thread_count), |
| 230 | cv_(cv), |
| 231 | mutex_(mutex) { |
| 232 | EXPECT_LT(rem, thread_count); |
| 233 | EXPECT_EQ(0, limit % thread_count); |
| 234 | } |
| 235 | |
| 236 | virtual void Run() OVERRIDE { |
| 237 | int last_count = -1; |
| 238 | while (true) { |
| 239 | LockGuard<Mutex> lock_guard(mutex_); |
| 240 | int count = *counter_; |
| 241 | while (count % thread_count_ != rem_ && count < limit_) { |
| 242 | cv_->Wait(mutex_); |
| 243 | count = *counter_; |
| 244 | } |
| 245 | if (count >= limit_) break; |
| 246 | EXPECT_EQ(*counter_, count); |
| 247 | if (last_count != -1) { |
| 248 | EXPECT_EQ(last_count + (thread_count_ - 1), count); |
| 249 | } |
| 250 | count++; |
| 251 | *counter_ = count; |
| 252 | last_count = count; |
| 253 | cv_->NotifyAll(); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | private: |
| 258 | const int rem_; |
| 259 | int* counter_; |
| 260 | const int limit_; |
| 261 | const int thread_count_; |
| 262 | ConditionVariable* cv_; |
| 263 | Mutex* mutex_; |
| 264 | }; |
| 265 | |
| 266 | } // namespace |
| 267 | |
| 268 | |
| 269 | TEST(ConditionVariable, LoopIncrement) { |
| 270 | static const int kMaxThreadCount = 16; |
| 271 | Mutex mutex; |
| 272 | ConditionVariable cv; |
| 273 | for (int thread_count = 1; thread_count < kMaxThreadCount; ++thread_count) { |
| 274 | int limit = thread_count * 10; |
| 275 | int counter = 0; |
| 276 | |
| 277 | // Setup the threads. |
| 278 | Thread** threads = new Thread* [thread_count]; |
| 279 | for (int n = 0; n < thread_count; ++n) { |
| 280 | threads[n] = new LoopIncrementThread(n, &counter, limit, thread_count, |
| 281 | &cv, &mutex); |
| 282 | } |
| 283 | |
| 284 | // Start all threads. |
| 285 | for (int n = thread_count - 1; n >= 0; --n) { |
| 286 | threads[n]->Start(); |
| 287 | } |
| 288 | |
| 289 | // Join and cleanup all threads. |
| 290 | for (int n = 0; n < thread_count; ++n) { |
| 291 | threads[n]->Join(); |
| 292 | delete threads[n]; |
| 293 | } |
| 294 | delete[] threads; |
| 295 | |
| 296 | EXPECT_EQ(limit, counter); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | } // namespace base |
| 301 | } // namespace v8 |