integrated auto_reset_event into test utils

test/utils/auto_reset_event.cpp

@@ -0,0 +1,26 @@
+#include "auto_reset_event.hpp"
+
+namespace matador::test::utils {
+
+auto_reset_event::auto_reset_event() : state(false) {}
+
+void auto_reset_event::wait_one()
+{
+  std::unique_lock<std::mutex> lock(sync);
+  underlying.wait(lock, [this](){return state.load();});
+  state = false;
+}
+
+void auto_reset_event::set()
+{
+  std::unique_lock<std::mutex> lock(sync);
+  state = true;
+  underlying.notify_one();
+}
+
+void auto_reset_event::reset()
+{
+  std::unique_lock<std::mutex> lock(sync);
+  state = false;
+}
+}

test/utils/auto_reset_event.hpp

@@ -0,0 +1,29 @@
+#ifndef QUERY_AUTO_RESET_EVENT_HPP
+#define QUERY_AUTO_RESET_EVENT_HPP
+
+#include <atomic>
+#include <condition_variable>
+#include <mutex>
+
+namespace matador::test::utils {
+
+class auto_reset_event
+{
+public:
+  auto_reset_event();
+  auto_reset_event(const auto_reset_event& other) = delete;
+
+  void wait_one();
+  void set();
+  void reset();
+
+private:
+  std::condition_variable underlying;
+  std::mutex sync;
+  std::atomic<bool> state;
+};
+
+
+}
+
+#endif //QUERY_AUTO_RESET_EVENT_HPP