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/usr/include/Nux-4.0/Nux/MainLoopGLib.h is in libnux-4.0-dev 4.0.8+16.04.20160209-0ubuntu2.

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#ifndef _NUX_MAIN_LOOP_GLIB_H
#define _NUX_MAIN_LOOP_GLIB_H

#include <glib.h>

namespace nux
{
  class ExternalGLibSources
  {
    public:

      void AddFdToGLibLoop(gint fd, gpointer data, GSourceFunc callback, GMainContext *context);
      void RemoveFdFromGLibLoop(gpointer data);
  };
}

#endif