xrootd
XrdClientMStream.hh
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1 #ifndef XRD_CLI_MSTREAM
2 #define XRD_CLI_MSTREAM
3 /******************************************************************************/
4 /* */
5 /* X r d C l i e n t M S t r e a m . h h */
6 /* */
7 /* Author: Fabrizio Furano (INFN Padova, 2006) */
8 /* */
9 /* This file is part of the XRootD software suite. */
10 /* */
11 /* XRootD is free software: you can redistribute it and/or modify it under */
12 /* the terms of the GNU Lesser General Public License as published by the */
13 /* Free Software Foundation, either version 3 of the License, or (at your */
14 /* option) any later version. */
15 /* */
16 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
17 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
18 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
19 /* License for more details. */
20 /* */
21 /* You should have received a copy of the GNU Lesser General Public License */
22 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
23 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
24 /* */
25 /* The copyright holder's institutional names and contributor's names may not */
26 /* be used to endorse or promote products derived from this software without */
27 /* specific prior written permission of the institution or contributor. */
28 /******************************************************************************/
29 
31 // //
32 // Helper code for XrdClient to handle multistream behavior //
33 // //
35 
37 
39 public:
40 
41  // Compute the parameters to split blocks
42  static void GetGoodSplitParameters(XrdClientConn *cliconn,
43  int &spltsize, int &reqsperstream,
44  kXR_int32 len);
45 
46  // Establish all the parallel streams, stop
47  // adding streams at the first creation refusal/failure
48  static int EstablishParallelStreams(XrdClientConn *cliconn);
49 
50  // Add a parallel stream to the pool used by the given client inst
51  static int AddParallelStream(XrdClientConn *cliconn, int port, int windowsz, int tempid);
52 
53  // Remove a parallel stream to the pool used by the given client inst
54  static int RemoveParallelStream(XrdClientConn *cliconn, int substream);
55 
56  // Binds the pending temporary parallel stream to the current session
57  // Returns into newid the substreamid assigned by the server
58  static bool BindPendingStream(XrdClientConn *cliconn, int substreamid, int &newid);
59 
60  struct ReadChunk {
64  };
65 
66 
67  // This splits a long requests into many smaller requests, to be sent in parallel
68  // through multiple streams
69  // Returns false if the chunk is not worth splitting
70  static bool SplitReadRequest(XrdClientConn *cliconn, kXR_int64 offset, kXR_int32 len,
71  XrdClientVector<ReadChunk> &reqlists);
72 
73 
74 };
75 #endif
static void GetGoodSplitParameters(XrdClientConn *cliconn, int &spltsize, int &reqsperstream, kXR_int32 len)
kXR_int64 offset
Definition: XrdClientMStream.hh:61
kXR_int32 len
Definition: XrdClientMStream.hh:62
Definition: XrdClientMStream.hh:38
static int RemoveParallelStream(XrdClientConn *cliconn, int substream)
static int EstablishParallelStreams(XrdClientConn *cliconn)
int streamtosend
Definition: XrdClientMStream.hh:63
static bool BindPendingStream(XrdClientConn *cliconn, int substreamid, int &newid)
Definition: XrdClientMStream.hh:60
Definition: XrdClientConn.hh:54
Definition: XrdClientVector.hh:49
static int AddParallelStream(XrdClientConn *cliconn, int port, int windowsz, int tempid)
static bool SplitReadRequest(XrdClientConn *cliconn, kXR_int64 offset, kXR_int32 len, XrdClientVector< ReadChunk > &reqlists)
int kXR_int32
Definition: XPtypes.hh:89
long long kXR_int64
Definition: XPtypes.hh:98