1 files changed, 301 insertions, 0 deletions
diff --git a/deps/v8/src/base/platform/condition-variable-unittest.cc b/deps/v8/src/base/platform/condition-variable-unittest.cc
new file mode 100644
index 0000000000..fe0ad2ade8
--- /dev/null
+++ b/deps/v8/src/base/platform/condition-variable-unittest.cc
@@ -0,0 +1,301 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/base/platform/condition-variable.h"
+
+#include "src/base/platform/platform.h"
+#include "src/base/platform/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace v8 {
+namespace base {
+
+TEST(ConditionVariable, WaitForAfterNofityOnSameThread) {
+  for (int n = 0; n < 10; ++n) {
+    Mutex mutex;
+    ConditionVariable cv;
+
+    LockGuard<Mutex> lock_guard(&mutex);
+
+    cv.NotifyOne();
+    EXPECT_FALSE(cv.WaitFor(&mutex, TimeDelta::FromMicroseconds(n)));
+
+    cv.NotifyAll();
+    EXPECT_FALSE(cv.WaitFor(&mutex, TimeDelta::FromMicroseconds(n)));
+  }
+}
+
+
+namespace {
+
+class ThreadWithMutexAndConditionVariable FINAL : public Thread {
+ public:
+  ThreadWithMutexAndConditionVariable()
+      : Thread(Options("ThreadWithMutexAndConditionVariable")),
+        running_(false),
+        finished_(false) {}
+  virtual ~ThreadWithMutexAndConditionVariable() {}
+
+  virtual void Run() OVERRIDE {
+    LockGuard<Mutex> lock_guard(&mutex_);
+    running_ = true;
+    cv_.NotifyOne();
+    while (running_) {
+      cv_.Wait(&mutex_);
+    }
+    finished_ = true;
+    cv_.NotifyAll();
+  }
+
+  bool running_;
+  bool finished_;
+  ConditionVariable cv_;
+  Mutex mutex_;
+};
+
+}  // namespace
+
+
+TEST(ConditionVariable, MultipleThreadsWithSeparateConditionVariables) {
+  static const int kThreadCount = 128;
+  ThreadWithMutexAndConditionVariable threads[kThreadCount];
+
+  for (int n = 0; n < kThreadCount; ++n) {
+    LockGuard<Mutex> lock_guard(&threads[n].mutex_);
+    EXPECT_FALSE(threads[n].running_);
+    EXPECT_FALSE(threads[n].finished_);
+    threads[n].Start();
+    // Wait for nth thread to start.
+    while (!threads[n].running_) {
+      threads[n].cv_.Wait(&threads[n].mutex_);
+    }
+  }
+
+  for (int n = kThreadCount - 1; n >= 0; --n) {
+    LockGuard<Mutex> lock_guard(&threads[n].mutex_);
+    EXPECT_TRUE(threads[n].running_);
+    EXPECT_FALSE(threads[n].finished_);
+  }
+
+  for (int n = 0; n < kThreadCount; ++n) {
+    LockGuard<Mutex> lock_guard(&threads[n].mutex_);
+    EXPECT_TRUE(threads[n].running_);
+    EXPECT_FALSE(threads[n].finished_);
+    // Tell the nth thread to quit.
+    threads[n].running_ = false;
+    threads[n].cv_.NotifyOne();
+  }
+
+  for (int n = kThreadCount - 1; n >= 0; --n) {
+    // Wait for nth thread to quit.
+    LockGuard<Mutex> lock_guard(&threads[n].mutex_);
+    while (!threads[n].finished_) {
+      threads[n].cv_.Wait(&threads[n].mutex_);
+    }
+    EXPECT_FALSE(threads[n].running_);
+    EXPECT_TRUE(threads[n].finished_);
+  }
+
+  for (int n = 0; n < kThreadCount; ++n) {
+    threads[n].Join();
+    LockGuard<Mutex> lock_guard(&threads[n].mutex_);
+    EXPECT_FALSE(threads[n].running_);
+    EXPECT_TRUE(threads[n].finished_);
+  }
+}
+
+
+namespace {
+
+class ThreadWithSharedMutexAndConditionVariable FINAL : public Thread {
+ public:
+  ThreadWithSharedMutexAndConditionVariable()
+      : Thread(Options("ThreadWithSharedMutexAndConditionVariable")),
+        running_(false),
+        finished_(false),
+        cv_(NULL),
+        mutex_(NULL) {}
+  virtual ~ThreadWithSharedMutexAndConditionVariable() {}
+
+  virtual void Run() OVERRIDE {
+    LockGuard<Mutex> lock_guard(mutex_);
+    running_ = true;
+    cv_->NotifyAll();
+    while (running_) {
+      cv_->Wait(mutex_);
+    }
+    finished_ = true;
+    cv_->NotifyAll();
+  }
+
+  bool running_;
+  bool finished_;
+  ConditionVariable* cv_;
+  Mutex* mutex_;
+};
+
+}  // namespace
+
+
+TEST(ConditionVariable, MultipleThreadsWithSharedSeparateConditionVariables) {
+  static const int kThreadCount = 128;
+  ThreadWithSharedMutexAndConditionVariable threads[kThreadCount];
+  ConditionVariable cv;
+  Mutex mutex;
+
+  for (int n = 0; n < kThreadCount; ++n) {
+    threads[n].mutex_ = &mutex;
+    threads[n].cv_ = &cv;
+  }
+
+  // Start all threads.
+  {
+    LockGuard<Mutex> lock_guard(&mutex);
+    for (int n = 0; n < kThreadCount; ++n) {
+      EXPECT_FALSE(threads[n].running_);
+      EXPECT_FALSE(threads[n].finished_);
+      threads[n].Start();
+    }
+  }
+
+  // Wait for all threads to start.
+  {
+    LockGuard<Mutex> lock_guard(&mutex);
+    for (int n = kThreadCount - 1; n >= 0; --n) {
+      while (!threads[n].running_) {
+        cv.Wait(&mutex);
+      }
+    }
+  }
+
+  // Make sure that all threads are running.
+  {
+    LockGuard<Mutex> lock_guard(&mutex);
+    for (int n = 0; n < kThreadCount; ++n) {
+      EXPECT_TRUE(threads[n].running_);
+      EXPECT_FALSE(threads[n].finished_);
+    }
+  }
+
+  // Tell all threads to quit.
+  {
+    LockGuard<Mutex> lock_guard(&mutex);
+    for (int n = kThreadCount - 1; n >= 0; --n) {
+      EXPECT_TRUE(threads[n].running_);
+      EXPECT_FALSE(threads[n].finished_);
+      // Tell the nth thread to quit.
+      threads[n].running_ = false;
+    }
+    cv.NotifyAll();
+  }
+
+  // Wait for all threads to quit.
+  {
+    LockGuard<Mutex> lock_guard(&mutex);
+    for (int n = 0; n < kThreadCount; ++n) {
+      while (!threads[n].finished_) {
+        cv.Wait(&mutex);
+      }
+    }
+  }
+
+  // Make sure all threads are finished.
+  {
+    LockGuard<Mutex> lock_guard(&mutex);
+    for (int n = kThreadCount - 1; n >= 0; --n) {
+      EXPECT_FALSE(threads[n].running_);
+      EXPECT_TRUE(threads[n].finished_);
+    }
+  }
+
+  // Join all threads.
+  for (int n = 0; n < kThreadCount; ++n) {
+    threads[n].Join();
+  }
+}
+
+
+namespace {
+
+class LoopIncrementThread FINAL : public Thread {
+ public:
+  LoopIncrementThread(int rem, int* counter, int limit, int thread_count,
+                      ConditionVariable* cv, Mutex* mutex)
+      : Thread(Options("LoopIncrementThread")),
+        rem_(rem),
+        counter_(counter),
+        limit_(limit),
+        thread_count_(thread_count),
+        cv_(cv),
+        mutex_(mutex) {
+    EXPECT_LT(rem, thread_count);
+    EXPECT_EQ(0, limit % thread_count);
+  }
+
+  virtual void Run() OVERRIDE {
+    int last_count = -1;
+    while (true) {
+      LockGuard<Mutex> lock_guard(mutex_);
+      int count = *counter_;
+      while (count % thread_count_ != rem_ && count < limit_) {
+        cv_->Wait(mutex_);
+        count = *counter_;
+      }
+      if (count >= limit_) break;
+      EXPECT_EQ(*counter_, count);
+      if (last_count != -1) {
+        EXPECT_EQ(last_count + (thread_count_ - 1), count);
+      }
+      count++;
+      *counter_ = count;
+      last_count = count;
+      cv_->NotifyAll();
+    }
+  }
+
+ private:
+  const int rem_;
+  int* counter_;
+  const int limit_;
+  const int thread_count_;
+  ConditionVariable* cv_;
+  Mutex* mutex_;
+};
+
+}  // namespace
+
+
+TEST(ConditionVariable, LoopIncrement) {
+  static const int kMaxThreadCount = 16;
+  Mutex mutex;
+  ConditionVariable cv;
+  for (int thread_count = 1; thread_count < kMaxThreadCount; ++thread_count) {
+    int limit = thread_count * 10;
+    int counter = 0;
+
+    // Setup the threads.
+    Thread** threads = new Thread* [thread_count];
+    for (int n = 0; n < thread_count; ++n) {
+      threads[n] = new LoopIncrementThread(n, &counter, limit, thread_count,
+                                           &cv, &mutex);
+    }
+
+    // Start all threads.
+    for (int n = thread_count - 1; n >= 0; --n) {
+      threads[n]->Start();
+    }
+
+    // Join and cleanup all threads.
+    for (int n = 0; n < thread_count; ++n) {
+      threads[n]->Join();
+      delete threads[n];
+    }
+    delete[] threads;
+
+    EXPECT_EQ(limit, counter);
+  }
+}
+
+}  // namespace base
+}  // namespace v8