Example #1
0
TEST_F(ContextMapTest, VerifyWithThreadsPathological) {
  ContextMap<size_t> mp;

  // Context collection and exit race threads:
  vector<std::shared_ptr<CoreContext>> contexts;

  // Exit race controller:
  AutoRequired<ExitRaceSignal> signal;

  // Create a number of dependent contexts:
  for(size_t i = 0; i < 100; i++) {
    AutoCreateContext context;
    contexts.push_back(context);

    // Store a shared pointer
    mp.Add(i, context);

    // Start the context
    context->Initiate();
  }

  // Set the signal:
  signal->Signal();

  // Verify that the map empties once our zero-count is hit:
  for(size_t i = 0; i < contexts.size(); i++) {
    contexts[i]->SignalShutdown(true);
  }

  // Clear the context collection:
  contexts.clear();
  EXPECT_EQ(0UL, mp.size()) << "Context map did not empty as expected";
}
TEST_F(ContextCreatorTest, ValidateMultipleEviction) {
  AutoCurrentContext()->Initiate();

  // Number of dependent contexts to be created
  const size_t count = 100;

  // Teardown lock, counter, and condition:
  std::mutex lock;
  std::condition_variable cond;
  int counter = count;

  // Obtain creator pointer:
  AutoRequired<Creator> creator;

  // Set up a signal manager at global context scope:
  AutoRequired<GlobalSignal> signal;
  {
    // Array of objects to test destruction on, and corresponding collection of contexts:
    std::shared_ptr<WaitMember> members[count];

    // Create a few contexts:
    for(int i = count; i--;) {
      AutoCreateContext ctxt;
      CurrentContextPusher pshr(ctxt);

      // Trivial validation that the newly created context is an empty context:
      ASSERT_EQ(static_cast<size_t>(0), ctxt->GetMemberCount()) << "A created context was not empty";

      // Add in an object to test asynchronous destruction:
      AutoRequired<WaitMember> obj;
      members[i] = obj;
      ASSERT_EQ(signal.get(), obj->m_signal.get()) << "Dependent context wiring did not correctly match to the enclosing scope";

      // Add a notifier to signal a continue condition when we have everything we need:
      ctxt->AddTeardownListener([&lock, &cond, &counter] {
        (std::lock_guard<std::mutex>)lock,
        counter--,
        cond.notify_all();
      });

      // Kick off the context:
      ctxt->Initiate();
    }

    // Signal all members and then release everything:
    signal->Signal();
  }

  // Wait for all contexts to be destroyed
  std::unique_lock<std::mutex> lk(lock);
  bool wait_status = cond.wait_for(lk, std::chrono::seconds(1), [&counter] {return counter == 0;});
  ASSERT_TRUE(wait_status) << "All teardown listeners didn't trigger, counter still at " << counter;

  // Validate that everything expires:
  ASSERT_EQ(static_cast<size_t>(0), creator->GetSize()) << "Not all contexts were evicted as expected";
}