// Copyright 2013 the V8 project authors. All rights reserved.
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#include "v8.h"

#include "cctest.h"
#include "libplatform/task-queue.h"
#include "test-libplatform.h"

using namespace v8::internal;


TEST(TaskQueueBasic) {
  TaskCounter task_counter;

  TaskQueue queue;

  TestTask* task = new TestTask(&task_counter);
  queue.Append(task);
  CHECK_EQ(1, task_counter.GetCount());
  CHECK_EQ(task, queue.GetNext());
  delete task;
  CHECK_EQ(0, task_counter.GetCount());

  queue.Terminate();
  CHECK_EQ(NULL, queue.GetNext());
}


class ReadQueueTask : public TestTask {
 public:
  ReadQueueTask(TaskCounter* task_counter, TaskQueue* queue)
      : TestTask(task_counter, true), queue_(queue) {}
  virtual ~ReadQueueTask() {}

  virtual void Run() V8_OVERRIDE {
    TestTask::Run();
    CHECK_EQ(NULL, queue_->GetNext());
  }

 private:
  TaskQueue* queue_;

  DISALLOW_COPY_AND_ASSIGN(ReadQueueTask);
};


TEST(TaskQueueTerminateMultipleReaders) {
  TaskQueue queue;
  TaskCounter task_counter;
  ReadQueueTask* read1 = new ReadQueueTask(&task_counter, &queue);
  ReadQueueTask* read2 = new ReadQueueTask(&task_counter, &queue);

  TestWorkerThread thread1(read1);
  TestWorkerThread thread2(read2);

  thread1.Start();
  thread2.Start();

  CHECK_EQ(2, task_counter.GetCount());

  thread1.Signal();
  thread2.Signal();

  queue.Terminate();

  thread1.Join();
  thread2.Join();

  CHECK_EQ(0, task_counter.GetCount());
}