v8/test/cctest/test-libplatform.h

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#ifndef TEST_LIBPLATFORM_H_
#define TEST_LIBPLATFORM_H_

#include "v8.h"

#include "cctest.h"

using namespace v8::internal;

class TaskCounter {
 public:
  TaskCounter() : counter_(0) {}
  ~TaskCounter() { CHECK_EQ(0, counter_); }

  int GetCount() const {
    LockGuard<Mutex> guard(&lock_);
    return counter_;
  }

  void Inc() {
    LockGuard<Mutex> guard(&lock_);
    ++counter_;
  }

  void Dec() {
    LockGuard<Mutex> guard(&lock_);
    --counter_;
  }

 private:
  mutable Mutex lock_;
  int counter_;

  DISALLOW_COPY_AND_ASSIGN(TaskCounter);
};


class TestTask : public v8::Task {
 public:
  TestTask(TaskCounter* task_counter, bool expected_to_run)
      : task_counter_(task_counter),
        expected_to_run_(expected_to_run),
        executed_(false) {
    task_counter_->Inc();
  }

  explicit TestTask(TaskCounter* task_counter)
      : task_counter_(task_counter), expected_to_run_(false), executed_(false) {
    task_counter_->Inc();
  }

  virtual ~TestTask() {
    CHECK_EQ(expected_to_run_, executed_);
    task_counter_->Dec();
  }

  // v8::Task implementation.
  virtual void Run() V8_OVERRIDE { executed_ = true; }

 private:
  TaskCounter* task_counter_;
  bool expected_to_run_;
  bool executed_;

  DISALLOW_COPY_AND_ASSIGN(TestTask);
};


class TestWorkerThread : public Thread {
 public:
  explicit TestWorkerThread(v8::Task* task)
      : Thread("libplatform TestWorkerThread"), semaphore_(0), task_(task) {}
  virtual ~TestWorkerThread() {}

  void Signal() { semaphore_.Signal(); }

  // Thread implementation.
  virtual void Run() V8_OVERRIDE {
    semaphore_.Wait();
    if (task_) {
      task_->Run();
      delete task_;
    }
  }

 private:
  Semaphore semaphore_;
  v8::Task* task_;

  DISALLOW_COPY_AND_ASSIGN(TestWorkerThread);
};

#endif  // TEST_LIBPLATFORM_H_