SelectorImplBSD.h

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/****************** <VPR heading BEGIN do not edit this line> *****************
 *
 * VR Juggler Portable Runtime
 *
 * Original Authors:
 *   Allen Bierbaum, Patrick Hartling, Kevin Meinert, Carolina Cruz-Neira
 *
 * -----------------------------------------------------------------
 * File:          $RCSfile$
 * Date modified: $Date: 2005-01-17 22:34:01 -0600 (Mon, 17 Jan 2005) $
 * Version:       $Revision: 16635 $
 * -----------------------------------------------------------------
 *
 ****************** <VPR heading END do not edit this line> ******************/

/*************** <auto-copyright.pl BEGIN do not edit this line> **************
 *
 * VR Juggler is (C) Copyright 1998-2005 by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
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#ifndef _VPR_SELECTOR_IMPL_BSD_H_
#define _VPR_SELECTOR_IMPL_BSD_H_

#include <vpr/vprConfig.h>

#include <vector>

#include <vpr/IO/SelectorBase.h>
#include <vpr/IO/IOSys.h>
#include <vpr/Util/ReturnStatus.h>
#include <vpr/Util/Interval.h>


namespace vpr
{

class SelectorImplBSD : public SelectorBase
{
public:
   // XXX: What should we do when we are adding a handler while
   //    also iterating through the current handles.  Bad things "may" happend
   // This happens ALL the time with acceptors because they add to the reactor
   // as they are executing an handleEvent themselves

   bool addHandle(vpr::IOSys::Handle handle, vpr::Uint16 mask = 0);

   bool removeHandle(vpr::IOSys::Handle handle);

   bool setIn(vpr::IOSys::Handle handle, vpr::Uint16 mask);

   vpr::Uint16 getIn(vpr::IOSys::Handle handle);

   vpr::Uint16 getOut(vpr::IOSys::Handle handle);

   vpr::ReturnStatus select(vpr::Uint16& numWithEvents,
                            const vpr::Interval timeout = vpr::Interval::NoTimeout);

   vpr::Uint16 getNumHandles()
   {
      return mPollDescs.size();
   }

   vpr::IOSys::Handle getHandle(vpr::Uint16 index)
   {
      return mPollDescs[index].fd;
   }

   bool containsHandle(vpr::IOSys::Handle handle)
   {
      return (getHandle(handle) != mPollDescs.end());
   }

protected:
   struct BSDPollDesc
   {
      int         fd;
      vpr::Uint16 in_flags;
      vpr::Uint16 out_flags;
   };

   std::vector<BSDPollDesc>::iterator getHandle(int handle);

   std::vector<BSDPollDesc> mPollDescs;
};

} // End of vpr namespace


#endif  /* _VPR_SELECTOR_IMPL_BSD_H_ */

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