XRootD
XrdPosixPrepIO.hh
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1 #ifndef __XRDPOSIXPREPIO_HH__
2 #define __XRDPOSIXPREPIO_HH__
3 /******************************************************************************/
4 /* */
5 /* X r d P o s i x P r e p I O . h h */
6 /* */
7 /* (c) 2016 by the Board of Trustees of the Leland Stanford, Jr., University */
8 /* All Rights Reserved */
9 /* Produced by Andrew Hanushevsky for Stanford University under contract */
10 /* DE-AC02-76-SFO0515 with the Department of Energy */
11 /* */
12 /* This file is part of the XRootD software suite. */
13 /* */
14 /* XRootD is free software: you can redistribute it and/or modify it under */
15 /* the terms of the GNU Lesser General Public License as published by the */
16 /* Free Software Foundation, either version 3 of the License, or (at your */
17 /* option) any later version. */
18 /* */
19 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
20 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
21 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
22 /* License for more details. */
23 /* */
24 /* You should have received a copy of the GNU Lesser General Public License */
25 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
26 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
27 /* */
28 /* The copyright holder's institutional names and contributor's names may not */
29 /* be used to endorse or promote products derived from this software without */
30 /* specific prior written permission of the institution or contributor. */
31 /******************************************************************************/
32 
33 #include "Xrd/XrdJob.hh"
34 #include "XrdPosix/XrdPosixFile.hh"
35 
36 class XrdOucCacheIOCD;
37 
39 {
40 public:
41 
42 bool Detach(XrdOucCacheIOCD &cdP) {(void)cdP; return true;}
43 
44 void Disable();
45 
46 long long FSize() {return (Init() ? fileP->FSize() : openRC);}
47 
48 int Fstat(struct stat &buf)
49  {return (Init() ? fileP->Fstat(buf) : openRC);}
50 
51 int Open() {Init(); return openRC;}
52 
53 const char *Path() {return fileP->Path();}
54 
55 int Read (char *Buffer, long long Offset, int Length)
56  {return (Init() ? fileP->Read(Buffer, Offset, Length) : openRC);}
57 
58 void Read (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rlen)
59  {if (Init(&iocb)) fileP->Read(iocb, buff, offs, rlen);
60  else iocb.Done(openRC);
61  }
62 
63 int ReadV(const XrdOucIOVec *readV, int n)
64  {return (Init() ? fileP->ReadV(readV, n) : openRC);}
65 
66 void ReadV(XrdOucCacheIOCB &iocb, const XrdOucIOVec *readV, int rnum)
67  {if (Init(&iocb)) fileP->ReadV(iocb, readV, rnum);
68  else iocb.Done(openRC);
69  }
70 
71 int Sync() {return (Init() ? fileP->Sync() : openRC);}
72 
73 void Sync(XrdOucCacheIOCB &iocb)
74  {if (Init(&iocb)) fileP->Sync(iocb);
75  else iocb.Done(openRC);
76  }
77 
78 int Trunc(long long Offset)
79  {return (Init() ? fileP->Trunc(Offset) : openRC);}
80 
81 int Write(char *Buffer, long long Offset, int Length)
82  {return (Init() ? fileP->Write(Buffer,Offset,Length) : openRC);}
83 
84 void Write(XrdOucCacheIOCB &iocb, char *buff, long long offs, int wlen)
85  {if (Init(&iocb)) fileP->Write(iocb, buff, offs, wlen);
86  else iocb.Done(openRC);
87  }
88 
90  XrdCl::Access::Mode clmode)
91  : fileP(fP), openRC(0), iCalls(0),
92  clFlags(clflags), clMode(clmode) {}
93 virtual ~XrdPosixPrepIO() {}
94 
95 private:
96 bool Init(XrdOucCacheIOCB *iocbP=0);
97 
98 XrdPosixFile *fileP;
99 int openRC;
100 int iCalls;
101 
103 XrdCl::Access::Mode clMode;
104 };
105 #endif
int stat(const char *path, struct stat *buf)
virtual void Done(int result)=0
const char * Path() override
int Write(char *Buff, long long Offs, int Len) override
int Sync() override
long long FSize() override
Definition: XrdPosixFile.hh:94
int Read(char *Buff, long long Offs, int Len) override
int Fstat(struct stat &buf) override
int Trunc(long long Offset) override
int ReadV(const XrdOucIOVec *readV, int n) override
int ReadV(const XrdOucIOVec *readV, int n)
int Read(char *Buffer, long long Offset, int Length)
const char * Path()
long long FSize()
int Write(char *Buffer, long long Offset, int Length)
bool Detach(XrdOucCacheIOCD &cdP)
void Sync(XrdOucCacheIOCB &iocb)
void Write(XrdOucCacheIOCB &iocb, char *buff, long long offs, int wlen)
void Read(XrdOucCacheIOCB &iocb, char *buff, long long offs, int rlen)
int Trunc(long long Offset)
XrdPosixPrepIO(XrdPosixFile *fP, XrdCl::OpenFlags::Flags clflags, XrdCl::Access::Mode clmode)
virtual ~XrdPosixPrepIO()
void ReadV(XrdOucCacheIOCB &iocb, const XrdOucIOVec *readV, int rnum)
int Fstat(struct stat &buf)
Mode
Access mode.
Flags
Open flags, may be or'd when appropriate.