xrootd
XrdOfsPoscq.hh
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1 #ifndef __OFSPOSCQ_H__
2 #define __OFSPOSCQ_H__
3 /******************************************************************************/
4 /* */
5 /* X r d O f s P o s c q . h h */
6 /* */
7 /* (c) 2009 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 "XrdSys/XrdSysPthread.hh"
34 
35 class XrdOss;
36 class XrdSysError;
37 
38 class XrdOfsPoscq
39 {
40 public:
41 
42 struct Request
43 {
44 long long addT; // Time committed to the queue
45 char LFN[1024]; // Logical File Name (null terminated)
46 char User[288]; // User trace identifier
47 char Reserved[24]; // Reserved for future
48 };
49 
50 static const int ReqOffs = 64;
51 static const int ReqSize = sizeof(Request);
52 
53 struct recEnt
54 {
55 recEnt *Next;
56 int Offset;
57 int Mode;
58 struct Request reqData;
59  recEnt(struct Request &reqref, int mval, recEnt *nval=0)
60  {Next = nval; Offset = 0; Mode = mval; reqData = reqref;}
61 };
62 
63  int Add(const char *Tident, const char *Lfn);
64 
65  int Commit(const char *Lfn, int Offset);
66 
67  int Del(const char *Lfn, int Offset, int Unlink=0);
68 
69  recEnt *Init(int &Ok);
70 
71 static recEnt *List(XrdSysError *Say, const char *theFN);
72 
73 inline int Num() {return pocIQ;}
74 
75  XrdOfsPoscq(XrdSysError *erp, XrdOss *oss, const char *fn);
76  ~XrdOfsPoscq() {}
77 
78 private:
79 void FailIni(const char *lfn);
80 int reqRead(void *Buff, int Offs);
81 int reqWrite(void *Buff, int Bsz, int Offs);
82 int ReWrite(recEnt *rP);
83 int VerOffset(const char *Lfn, int Offset);
84 
85 struct FileSlot
86  {FileSlot *Next;
87  int Offset;
88  };
89 
90 XrdSysMutex myMutex;
91 XrdSysError *eDest;
92 XrdOss *ossFS;
93 FileSlot *SlotList;
94 FileSlot *SlotLust;
95 char *pocFN;
96 int pocSZ;
97 int pocFD;
98 int pocIQ;
99 };
100 #endif
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