Device: Refactor heartbeat

include/icsneo/api/heartbeat.h

@@ -0,0 +1,38 @@
+#ifndef __HEARTBEAT_H__
+#define __HEARTBEAT_H__
+
+#ifdef __cplusplus
+
+#include <thread>
+#include <condition_variable>
+#include <mutex>
+
+namespace icsneo {
+
+class Device;
+
+class Heartbeat {
+public:
+    Heartbeat(Device& device);
+    ~Heartbeat();
+
+private:
+    enum class Mode {
+        Passive, // ResetStatus messages arrive without requesting
+        Active, // RequestStatusUpdate needs to be sent
+    };
+    Device& device;
+    const Mode mode;
+    bool stop = false;
+    std::mutex mutex;
+    std::condition_variable cv;
+    std::thread thread;
+
+    void run();
+};
+
+} // icsneo
+
+#endif // __cplusplus
+
+#endif // __HEARTBEAT_H__