XrdOfsCPFile.hh

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#ifndef __XRDOFSCPFILE_HH__
#define __XRDOFSCPFILE_HH__
/******************************************************************************/
/*                                                                            */
/*                       X r d O f s C P F i l e . h h                        */
/*                                                                            */
/* (c) 2020 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 <cstdint>
#include <ctime>
  
struct stat;
class  XrdOucIOVec;
 
class XrdOfsCPFile
{
public:
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
int            Append(const char *data, off_t offset, int dlen);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
int            Create(const char *lfn, struct stat &Stat);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
int            Destroy();
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
int            ErrState();
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
const char    *FName(bool trim=false);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
bool           isActive() {return ckpFN != 0;}
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
       bool    Reserve(int dlen, int nseg);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
class rInfo
     {public:
      friend class XrdOfsCPFile;
      const char  *srcLFN;     
      int64_t      fSize;      
      time_t       mTime;      
      XrdOucIOVec *DataVec;    
      int          DataNum;    
      int          DataLen;    
                   rInfo();
                  ~rInfo();
      private:
      void        *rBuff;
     };
 
       int     RestoreInfo(rInfo &rinfo, const char *&ewhy);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
       int     Sync();
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
static char   *Target(const char *ckpfn);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
       int     Used(int nseg=0);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
               XrdOfsCPFile(const char *cfn=0);
 
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
 
              ~XrdOfsCPFile();
 
private:
static char *genCkpPath();
static int   getSrcLfn(const char *cFN, rInfo &rinfo, int fd, int rc);
 
char *ckpFN;
int   ckpFD;
int   ckpDLen;
int   ckpSize;
};
#endif