///////////////////////////////////////////////////////////////////////////////

// Name:        wx/private/fdiohandler.h

// Purpose:     declares wxFDIOHandler class

// Author:      Vadim Zeitlin

// Created:     2009-08-17

// Copyright:   (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>

// Licence:     wxWindows licence

///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_PRIVATE_FDIOHANDLER_H_

#define _WX_PRIVATE_FDIOHANDLER_H_

// ----------------------------------------------------------------------------

// wxFDIOHandler: interface used to process events on file descriptors

// ----------------------------------------------------------------------------

class wxFDIOHandler

{

public:

    wxFDIOHandler() { m_regmask = 0; }

    // called when descriptor is available for non-blocking read

    virtual void OnReadWaiting() = 0;

    // called when descriptor is available  for non-blocking write

    virtual void OnWriteWaiting() = 0;

    // called when there is exception on descriptor

    virtual void OnExceptionWaiting() = 0;

    // called to check if the handler is still valid, only used by

    // wxSocketImplUnix currently

    virtual bool IsOk() const { return true; }

    // get/set the mask of events for which we're currently registered for:

    // it's a combination of wxFDIO_{INPUT,OUTPUT,EXCEPTION}

    int GetRegisteredEvents() const { return m_regmask; }

    void SetRegisteredEvent(int flag) { m_regmask |= flag; }

    void ClearRegisteredEvent(int flag) { m_regmask &= ~flag; }

    // virtual dtor for the base class

    virtual ~wxFDIOHandler() { }

private:

    int m_regmask;

    wxDECLARE_NO_COPY_CLASS(wxFDIOHandler);

};

#endif // _WX_PRIVATE_FDIOHANDLER_H_