XRootD
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XrdPssAioCB.cc
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1/******************************************************************************/
2/* */
3/* X r d P s s A i o C B . c c */
4/* */
5/* (c) 2016 by the Board of Trustees of the Leland Stanford, Jr., University */
6/* All Rights Reserved */
7/* Produced by Andrew Hanushevsky for Stanford University under contract */
8/* DE-AC02-76-SFO0515 with the Department of Energy */
9/* */
10/* This file is part of the XRootD software suite. */
11/* */
12/* XRootD is free software: you can redistribute it and/or modify it under */
13/* the terms of the GNU Lesser General Public License as published by the */
14/* Free Software Foundation, either version 3 of the License, or (at your */
15/* option) any later version. */
16/* */
17/* XRootD is distributed in the hope that it will be useful, but WITHOUT */
18/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
19/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
20/* License for more details. */
21/* */
22/* You should have received a copy of the GNU Lesser General Public License */
23/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
24/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
25/* */
26/* The copyright holder's institutional names and contributor's names may not */
27/* be used to endorse or promote products derived from this software without */
28/* specific prior written permission of the institution or contributor. */
29/******************************************************************************/
30
31#include <cerrno>
32
33#include "XrdPss/XrdPssAioCB.hh"
34#include "XrdSfs/XrdSfsAio.hh"
35
36/******************************************************************************/
37/* S t a t i c M e m b e r s */
38/******************************************************************************/
39
40XrdSysMutex XrdPssAioCB::myMutex;
41XrdPssAioCB *XrdPssAioCB::freeCB = 0;
42int XrdPssAioCB::numFree = 0;
43int XrdPssAioCB::maxFree = 100;
44
45/******************************************************************************/
46/* A l l o c */
47/******************************************************************************/
48
49XrdPssAioCB *XrdPssAioCB::Alloc(XrdSfsAio *aiop, bool isWr, bool pgrw)
50{
51 XrdPssAioCB *newCB;
52
53// Try to allocate an prexisting object otherwise get a new one
54//
55 myMutex.Lock();
56 if ((newCB = freeCB)) {freeCB = newCB->next; numFree--;}
57 else newCB = new XrdPssAioCB;
58 myMutex.UnLock();
59
60// Initialize the callback and return it
61//
62 newCB->theAIOP = aiop;
63 newCB->isWrite = isWr;
64 newCB->isPGrw = pgrw;
65 return newCB;
66}
67
68/******************************************************************************/
69/* C o m p l e t e */
70/******************************************************************************/
71
72#include <iostream>
73void XrdPssAioCB::Complete(ssize_t result)
74{
75
76// Set correct result
77//
78// std::cerr <<"AIO fin " <<(isWrite ? " write ":" read ")
79// <<theAIOP->sfsAio.aio_nbytes <<'@' <<theAIOP->sfsAio.aio_offset
80// <<" result " <<result <<std::endl;
81 theAIOP->Result = (result < 0 ? -errno : result);
82
83// Perform post processing for pgRead or pgWrite if successful
84//
85 if (isPGrw && result >= 0)
86 {if (isWrite)
87 {
88 } else {
89 if (csVec.size() && theAIOP->cksVec)
90 memcpy(theAIOP->cksVec, csVec.data(), csVec.size()*sizeof(uint32_t));
91 }
92 }
93
94// Invoke the callback
95//
96 if (isWrite) theAIOP->doneWrite();
97 else theAIOP->doneRead();
98
99// Now recycle ourselves
100//
101 Recycle();
102}
103
104/******************************************************************************/
105/* R e c y c l e */
106/******************************************************************************/
107
109{
110// Perform recycling
111//
112 myMutex.Lock();
113 if (numFree >= maxFree) delete this;
114 else {next = freeCB;
115 freeCB = this;
116 numFree++;
117 csVec.clear();
118 }
119 myMutex.UnLock();
120}
std::vector< uint32_t > csVec
virtual void Complete(ssize_t Result)
static XrdPssAioCB * Alloc(XrdSfsAio *aiop, bool isWr, bool pgrw=false)