C++ AutoRequired::Wait方法代码示例

TEST_F(AutoPacketFactoryTest, AutoPacketStatistics) {
  // Create a context, fill it up, kick it off:
  AutoCurrentContext ctxt;
  AutoRequired<DelaysAutoPacketsOneMS> dapoms;
  AutoRequired<AutoPacketFactory> factory;
  ctxt->Initiate();

  int numPackets = 20;

  // Send 20 packets which should all be delayed 1ms
  for (int i = 0; i < numPackets; ++i) {
    auto packet = factory->NewPacket();
    packet->Decorate(i);
  }

  // Shutdown our context, and rundown our factory
  ctxt->SignalShutdown();
  factory->Wait();

  // Ensure that the statistics are not too wrong
  // We delayed each packet by one ms, and our statistics are given in nanoseconds
  double packetDelay = (double) std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::milliseconds(1)).count();
  ASSERT_EQ(numPackets, factory->GetTotalPacketCount()) << "The factory did not get enough packets";

  ASSERT_LE(packetDelay, factory->GetMeanPacketLifetime()) << "The mean packet lifetime was less than the delay on each packet";
}

TEST_F(AutoPacketFactoryTest, WaitRunsDownAllPackets) {
  AutoCurrentContext()->Initiate();

  // Create a factory in our context, factory had better be started:
  AutoRequired<AutoPacketFactory> factory;
  ASSERT_TRUE(factory->IsRunning()) << "Factory was not started even though it was a member of an initiated context";

  // Make the thread create and hold a packet, and then return
  AutoRequired<IssuesPacketWaitsThenQuits> ipwtq;

  // Shutdown context
  AutoCurrentContext()->SignalShutdown();

  // Now we're going to try to run down the factory:
  factory->Wait();

  // Verify that the thread has quit:
  ASSERT_TRUE(ipwtq->m_hasQuit) << "AutoPacketFactory::Wait returned prematurely";
}

TEST_F(ObjectPoolTest, VerifyAsynchronousUsage) {
  AutoCreateContext ctxt;
  CurrentContextPusher pshr(ctxt);

  AutoRequired<SimpleThreadedT<PooledObject>> obj;
  AutoFired<SharedPtrReceiver<PooledObject>> spr;
  ObjectPool<PooledObject> pool(3);

  {
    // Obtain the pool limit in objects:
    std::shared_ptr<PooledObject> obj1, obj2, obj3;
    pool(obj1);
    pool(obj2);
    pool(obj3);

    ASSERT_TRUE(nullptr != obj1.get()) << "Failed to obtain an entry from a new object pool";

    // Block--verify that we _do not_ get any of those objects back while they are
    // still outstanding.
    {
      auto obj4 = pool.WaitFor(std::chrono::milliseconds(1));
      EXPECT_TRUE(obj4 == nullptr) << "Pool issued another element even though it should have hit its outstanding limit";
    }

    // Now we kick off threads:
    AutoCurrentContext()->Initiate();

    // Fire off a few events:
    spr(&SharedPtrReceiver<PooledObject>::OnEvent)(obj1);
    spr(&SharedPtrReceiver<PooledObject>::OnEvent)(obj2);
    spr(&SharedPtrReceiver<PooledObject>::OnEvent)(obj3);
  }

  // This should return more or less right away as objects become available:
  {
    auto obj4 = pool.WaitFor(std::chrono::milliseconds(10));
    EXPECT_TRUE(obj4 != nullptr) << "Object pool failed to be notified that it received a new element";
  }

  // Cause the thread to quit:
  *obj += [&obj] { obj->Stop(); };
  obj->Wait();
}