CallbackStreamBuf.h

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#ifndef GAUDIPYTHON_CALLBACKSTREAMBUF_H
#define GAUDIPYTHON_CALLBACKSTREAMBUF_H
// ============================================================================
#include "Python.h" //included for the python API
// ============================================================================
#include <array>
#include <sstream> //included for stringbuf
// ============================================================================
#include "GaudiKernel/Kernel.h"
#include "GaudiPython/GaudiPython.h"
// ============================================================================

namespace GaudiPython
{
  int GAUDI_API call_python_method( PyObject* self, const char* method, char* buf );

  class GAUDI_API CallbackStreamBuf : public std::stringbuf
  {
  private:
    class PyObject_t
    {
      PyObject* m_obj;

    public:
      PyObject_t( PyObject* obj = nullptr ) : m_obj( obj )
      {
        if ( m_obj ) Py_INCREF( m_obj );
      }
      ~PyObject_t()
      {
        if ( m_obj ) Py_DECREF( m_obj );
      }
      PyObject* get() { return m_obj; }
    };
    PyObject_t m_self;
    std::array<char, 512> m_callbackBuff; // used for passing the flushed chars in the python callback

  public:
    CallbackStreamBuf( PyObject* self );
    int sync() override;
  };
}

#endif