add tiny delay at the end of Stream open to avoid race condition + test revalidation

Author: frs69wq

src/Engine.cpp

@@ -138,7 +138,7 @@ void Engine::end_pub_transaction()
 void Engine::pub_close()
 {
   auto self = sg4::Actor::self();
-  XBT_DEBUG("Publisher '%s' is closing the engine", self->get_cname());
+  XBT_DEBUG("Publisher '%s' is closing the engine '%s'", self->get_cname(), get_cname());
   if (not pub_closing_) {
     // I'm the first to close
     pub_closing_ = true;
@@ -221,7 +221,7 @@ void Engine::end_sub_transaction()
 void Engine::sub_close()
 {
   auto self               = sg4::Actor::self();
-  XBT_DEBUG("Subscriber '%s' is closing the engine", self->get_cname());
+  XBT_DEBUG("Subscriber '%s' is closing the engine '%s'", self->get_cname(), get_cname());
   if (not sub_closing_) {
     // I'm the first to close
     sub_closing_ = true;

src/Stream.cpp

@@ -133,6 +133,7 @@ std::shared_ptr<Engine> Stream::open(const std::string& name, Mode mode)
   dtl_->lock();
 
   if (not engine_) {
+    XBT_DEBUG("Create Engine"); 
     if (engine_type_ == Engine::Type::Staging) {
       engine_ = std::make_shared<StagingEngine>(name, this);
     } else if (engine_type_ == Engine::Type::File) {
@@ -145,7 +146,7 @@ std::shared_ptr<Engine> Stream::open(const std::string& name, Mode mode)
   dtl_->unlock();
 
   while (not engine_)
-    sg4::this_actor::sleep_for(0.05);
+    sg4::this_actor::sleep_for(0.01);
 
   // Then we register the actors calling Stream::open as publishers or subscribers in the newly created Engine.
   if (mode == dtlmod::Stream::Mode::Publish) {
@@ -154,9 +155,11 @@ std::shared_ptr<Engine> Stream::open(const std::string& name, Mode mode)
     engine_->add_subscriber(sg4::Actor::self(), rendez_vous_);
   }
 
-  XBT_DEBUG("Stream '%s' uses engine '%s' and transport '%s' (%zu Pub. / %zu Sub.)", get_cname(), get_engine_type_str(),
-            get_transport_method_str(), engine_->get_num_publishers(), engine_->get_num_subscribers());
+  XBT_DEBUG("Stream '%s' uses engine '%s' of type '%s' and transport '%s' (%zu Pub. / %zu Sub.)", get_cname(), engine_->get_cname(),
+	    get_engine_type_str(), get_transport_method_str(), engine_->get_num_publishers(), engine_->get_num_subscribers());
 
+  sg4::this_actor::sleep_for(0.05);
+ 
   return engine_;
 }
 

test/dtl_file_engine.cpp

@@ -234,7 +234,7 @@ TEST_F(DTLFileEngineTest, MultiplePubSingleSubSharedStorage)
       XBT_INFO("Start a Transaction");
       ASSERT_NO_THROW(engine->begin_transaction());
       XBT_INFO("Transition can start as publishers have finished writing");
-      ASSERT_DOUBLE_EQ(sg4::Engine::get_clock(), 15.651431842993127);
+      ASSERT_DOUBLE_EQ(sg4::Engine::get_clock(), 15.701431842993127);
       XBT_INFO("Get the entire Variable 'var' from the DTL");
       ASSERT_NO_THROW(engine->get(var_sub));
       XBT_INFO("End a Transaction");

test/dtl_stream.cpp

@@ -138,7 +138,7 @@ TEST_F(DTLStreamTest, PublishFileMultipleOpen)
       XBT_INFO("Open the Stream in Stream::Mode::Publish mode");
       ASSERT_NO_THROW(engine = stream->open("zone:fs:/pfs/file", dtlmod::Stream::Mode::Publish));
       XBT_INFO("Check current number of publishers and subscribers");
-      ASSERT_EQ(stream->get_num_publishers(), 1);
+      ASSERT_EQ(stream->get_num_publishers(), 2);
       ASSERT_EQ(stream->get_num_subscribers(), 0);
       ASSERT_NO_THROW(sg4::this_actor::sleep_for(1));
       XBT_INFO("Close the engine");
@@ -194,8 +194,8 @@ TEST_F(DTLStreamTest, OpenWithRendezVous)
         ASSERT_NO_THROW(stream->set_rendez_vous());
         XBT_INFO("Open the Stream in Stream::Mode::Publish mode");
         ASSERT_NO_THROW(engine = stream->open("foo", dtlmod::Stream::Mode::Publish));
-        XBT_INFO("Open complete. Clock should be at 10s");
-        ASSERT_DOUBLE_EQ(sg4::Engine::get_clock(), 10.0);
+        XBT_INFO("Open complete. Clock should be at 10.05s");
+        ASSERT_DOUBLE_EQ(sg4::Engine::get_clock(), 10.05);
         XBT_INFO("Let actor %s sleep for 1 second", sg4::this_actor::get_cname());
         ASSERT_NO_THROW(sg4::this_actor::sleep_for(1));
         XBT_INFO("Close the engine");