XRootD
XrdNetBuffer.cc
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/******************************************************************************/
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/* */
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/* X r d O u c B u f f e r . c c */
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/* */
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/* (c) 2004 by the Board of Trustees of the Leland Stanford, Jr., University */
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/* All Rights Reserved */
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/* Produced by Andrew Hanushevsky for Stanford University under contract */
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/* DE-AC02-76-SFO0515 with the Department of Energy */
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/* */
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/* This file is part of the XRootD software suite. */
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/* */
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/* XRootD is free software: you can redistribute it and/or modify it under */
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/* the terms of the GNU Lesser General Public License as published by the */
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/* Free Software Foundation, either version 3 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* XRootD is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
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/* License for more details. */
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/* */
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/* You should have received a copy of the GNU Lesser General Public License */
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/* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
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/* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
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/* */
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/* The copyright holder's institutional names and contributor's names may not */
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/* be used to endorse or promote products derived from this software without */
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/* specific prior written permission of the institution or contributor. */
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/******************************************************************************/
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#ifndef WIN32
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#include <cstdlib>
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#include "
XrdNet/XrdNetBuffer.hh
"
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#include "
XrdSys/XrdSysPlatform.hh
"
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/******************************************************************************/
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/* X r d N e t B u f f e r Q M e t h o d s */
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/******************************************************************************/
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/******************************************************************************/
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/* C o n s t r u c t o r */
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/******************************************************************************/
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XrdNetBufferQ::XrdNetBufferQ
(
int
bsz,
int
maxb)
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{
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size
= bsz;
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alignit
= (
size
< sysconf(_SC_PAGESIZE)
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?
size
: sysconf(_SC_PAGESIZE));
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maxbuff
= maxb;
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numbuff
= 0;
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}
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/******************************************************************************/
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/* D e s t r u c t o r */
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/******************************************************************************/
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XrdNetBufferQ::~XrdNetBufferQ
()
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{
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XrdNetBuffer
*bp;
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while
((bp =
BuffStack
.
Pop
()))
delete
bp;
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}
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/******************************************************************************/
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/* A l l o c */
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/******************************************************************************/
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XrdNetBuffer
*
XrdNetBufferQ::Alloc
()
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{
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XrdNetBuffer
*bp;
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// Lock the data area
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//
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BuffList
.
Lock
();
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// Either return a new buffer or an old one
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//
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if
((bp =
BuffStack
.
Pop
()))
numbuff
--;
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else
if
((bp =
new
XrdNetBuffer
(
this
))
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&& posix_memalign((
void
**)&(bp->
data
),
alignit
,
size
))
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{
delete
bp; bp = 0;}
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// Unlock the data area
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//
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BuffList
.
UnLock
();
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// Return the buffer
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//
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return
bp;
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}
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/******************************************************************************/
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/* R e c y c l e */
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/******************************************************************************/
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void
XrdNetBufferQ::Recycle
(
XrdNetBuffer
*bp)
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{
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// Check if we have enough objects, if so, delete ourselves and return
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//
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if
(
numbuff
>=
maxbuff
) {
delete
bp;
return
;}
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bp->
dlen
= 0;
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// Add the buffer to the recycle list
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//
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BuffList
.
Lock
();
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BuffStack
.
Push
(&bp->BuffLink);
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numbuff
++;
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BuffList
.
UnLock
();
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return
;
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}
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/******************************************************************************/
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/* S e t */
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/******************************************************************************/
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void
XrdNetBufferQ::Set
(
int
maxb)
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{
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// Lock the data area, set max buffers, unlock and return
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//
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BuffList
.
Lock
();
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maxbuff
= maxb;
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BuffList
.
UnLock
();
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return
;
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}
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/******************************************************************************/
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/* X r d N e t B u f f e r M e t h o d s */
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/******************************************************************************/
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/******************************************************************************/
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/* C o n s t r u c t o r */
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/******************************************************************************/
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XrdNetBuffer::XrdNetBuffer
(
XrdNetBufferQ
*bq) : BuffLink(this)
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{
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BuffQ= bq;
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data
= 0;
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dlen
= 0;
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}
XrdNetBuffer.hh
XrdSysPlatform.hh
XrdNetBufferQ
Definition:
XrdNetBuffer.hh:45
XrdNetBufferQ::~XrdNetBufferQ
~XrdNetBufferQ()
Definition:
XrdNetBuffer.cc:60
XrdNetBufferQ::BuffStack
XrdOucStack< XrdNetBuffer > BuffStack
Definition:
XrdNetBuffer.hh:61
XrdNetBufferQ::BuffList
XrdSysMutex BuffList
Definition:
XrdNetBuffer.hh:60
XrdNetBufferQ::alignit
int alignit
Definition:
XrdNetBuffer.hh:59
XrdNetBufferQ::XrdNetBufferQ
XrdNetBufferQ(int bsz, int maxb=16)
Definition:
XrdNetBuffer.cc:47
XrdNetBufferQ::numbuff
int numbuff
Definition:
XrdNetBuffer.hh:63
XrdNetBufferQ::Alloc
XrdNetBuffer * Alloc()
Definition:
XrdNetBuffer.cc:71
XrdNetBufferQ::Set
void Set(int maxb)
Definition:
XrdNetBuffer.cc:120
XrdNetBufferQ::size
int size
Definition:
XrdNetBuffer.hh:64
XrdNetBufferQ::maxbuff
int maxbuff
Definition:
XrdNetBuffer.hh:62
XrdNetBufferQ::Recycle
void Recycle(XrdNetBuffer *bp)
Definition:
XrdNetBuffer.cc:99
XrdNetBuffer
Definition:
XrdNetBuffer.hh:72
XrdNetBuffer::XrdNetBuffer
XrdNetBuffer(XrdNetBufferQ *bq)
Definition:
XrdNetBuffer.cc:138
XrdNetBuffer::data
char * data
Definition:
XrdNetBuffer.hh:76
XrdNetBuffer::dlen
int dlen
Definition:
XrdNetBuffer.hh:77
XrdOucStack::Pop
T * Pop()
Definition:
XrdOucChain.hh:50
XrdOucStack::Push
void Push(XrdOucQSItem< T > *item)
Definition:
XrdOucChain.hh:57
XrdSysMutex::Lock
void Lock()
Definition:
XrdSysPthread.hh:222
XrdSysMutex::UnLock
void UnLock()
Definition:
XrdSysPthread.hh:224
XrdNet
XrdNetBuffer.cc
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