vendor Catch2 and ETL

contrib/fsfw_contrib/etl-20.39.4/examples/MutexMessageRouter/MutexMessageRouter.cpp

@@ -0,0 +1,110 @@
+
+#include <iostream>
+#include <thread>
+#include <atomic>
+#include <string>
+#include <chrono>
+
+#include "etl/mutex.h"
+#include "etl/message.h"
+#include "etl/message_router.h"
+
+//*************************************
+struct Message1 : public etl::message<1>
+{
+};
+
+//*************************************
+struct Message2 : public etl::message<2>
+{
+};
+
+//*************************************
+class Router : public etl::message_router<Router, Message1, Message2>
+{
+public:
+
+  using base_t = etl::message_router<Router, Message1, Message2>;
+
+  //*****************
+  // Overridden receive that protects access with mutexes
+  void receive(const etl::imessage& msg) override
+  {
+    access.lock();
+    base_t::receive(msg); // Send it to the message_router's receive.
+    access.unlock();
+  }
+
+  //*****************
+  void on_receive(const Message1&)
+  {
+    result.append("Message1\n");
+  }
+
+  //*****************
+  void on_receive(const Message2&)
+  {
+    result.append("Message2\n");
+  }
+
+  //*****************
+  void on_receive_unknown(const etl::imessage&)
+  {
+  }
+
+  std::string result;
+
+private:
+
+  etl::mutex access;
+};
+
+//*************************************
+etl::atomic<bool> start = false;
+Router router;
+
+//*************************************
+void thread1()
+{
+  using namespace std::chrono_literals;
+
+  while (!start.load());
+
+  for (int i = 0; i < 10; ++i)
+  {
+    std::this_thread::sleep_for(1ms);
+    router.receive(Message1());
+  }
+}
+
+//*************************************
+void thread2()
+{
+  using namespace std::chrono_literals;
+
+  while (!start.load());
+
+  for (int i = 0; i < 10; ++i)
+  {
+    std::this_thread::sleep_for(1ms);
+    router.receive(Message2());
+  }
+}
+
+//*************************************
+int main()
+{
+  std::thread t1(thread1);
+  std::thread t2(thread2);
+
+  start.store(true);
+
+  t1.join();
+  t2.join();
+
+  std::cout << router.result << "\n";
+
+  return 0;
+}
+
+