XrdPosixObjGuard.hh

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#ifndef __XRDPOSIXOBJGUARD_HH__
#define __XRDPOSIXOBJGUARD_HH__
/******************************************************************************/
/*                                                                            */
/*                   X r d P o s i x O b j G u a r d . h h                    */
/*                                                                            */
/* (c) 2016 by the Board of Trustees of the Leland Stanford, Jr., University  */
/*                            All Rights Reserved                             */
/*   Produced by Andrew Hanushevsky for Stanford University under contract    */
/*              DE-AC02-76-SFO0515 with the Department of Energy              */
/*                                                                            */
/* This file is part of the XRootD software suite.                            */
/*                                                                            */
/* XRootD is free software: you can redistribute it and/or modify it under    */
/* the terms of the GNU Lesser General Public License as published by the     */
/* Free Software Foundation, either version 3 of the License, or (at your     */
/* option) any later version.                                                 */
/*                                                                            */
/* XRootD 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 Lesser General Public       */
/* License for more details.                                                  */
/*                                                                            */
/* You should have received a copy of the GNU Lesser General Public License   */
/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file  */
/* COPYING (GPL license).  If not, see <http://www.gnu.org/licenses/>.        */
/*                                                                            */
/* The copyright holder's institutional names and contributor's names may not */
/* be used to endorse or promote products derived from this software without  */
/* specific prior written permission of the institution or contributor.       */
/******************************************************************************/
 
#include "XrdPosix/XrdPosixFile.hh"
 
class XrdPosixObjGuard
{
public:
 
void  Init(XrdPosixFile *fP)
          {if (guardP)
              {guardP->unRef();
               guardP->updUnLock();
              }
           guardP = fP;
           guardP->Ref();
           guardP->updLock();
          }
 
void  Release() {if (guardP)
                    {guardP->unRef();
                     guardP->updUnLock();
                     guardP = 0;
                    }
                }
 
      XrdPosixObjGuard(XrdPosixFile *fP): guardP(0) {Init(fP);}
     ~XrdPosixObjGuard() {Release();}
 
private:
XrdPosixFile *guardP;
};
#endif