Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/DDS/Generic/wait_set_handler.h

@@ -0,0 +1,65 @@
+
+
+
+#pragma once
+
+#include <dds/core/cond/Condition.hpp>
+#include <dds/core/cond/GuardCondition.hpp>
+#include <dds/core/cond/WaitSet.hpp>
+
+#include <future>
+#include <map>
+#include <DDS/Generic/ddsgen_export.h>
+
+namespace NGL
+{
+class INGLLogger;
+}
+
+namespace DDSGeneric
+{
+class DDSGEN_EXPORT WaitSetHandler final
+{
+public:
+  class CallbackInterface
+  {
+  public:
+    virtual ~CallbackInterface() = default;
+    virtual void dataAvailable() = 0;
+  };
+
+  WaitSetHandler();
+  ~WaitSetHandler();
+
+  bool attachWaitSet(const dds::core::cond::Condition &cond, CallbackInterface *cb);
+  bool detachWaitSet(const dds::core::cond::Condition &cond, CallbackInterface *cb);
+  bool enableWaitSet(const dds::core::cond::Condition &cond, CallbackInterface *cb);
+  bool disableWaitSet(const dds::core::cond::Condition &cond, CallbackInterface *cb);
+
+  int attachedConditionCount() const;
+
+private:
+  struct WaitSetData final
+  {
+    dds::core::cond::Condition condition;
+    CallbackInterface *callback = nullptr;
+    bool enabled = true;
+    bool needWaitSetAttach = false;
+
+    WaitSetData(const dds::core::cond::Condition &cond, CallbackInterface *cb)
+      : condition(cond)
+      , callback(cb)
+    {}
+  };
+private:
+  void waitSetTask();
+private:
+
+  dds::core::cond::WaitSet m_waitSet;
+  dds::core::cond::GuardCondition m_abortCondition;
+  std::future<void> m_task;
+  std::mutex m_accessMutex;
+  std::map<const DDS_Condition *, WaitSetData> m_waitSetData;
+  NGL::INGLLogger &m_logger;
+};
+}