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XrdSfs
XrdSfsAio.hh
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#ifndef __SFS_AIO_H__
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#define __SFS_AIO_H__
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/******************************************************************************/
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/* */
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/* X r d S f s A i o . h h */
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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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/* 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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#include <signal.h>
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#include <sys/types.h>
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// _POSIX_ASYNCHRONOUS_IO, if it is defined, is in unistd.h.
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#include <unistd.h>
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#ifdef _POSIX_ASYNCHRONOUS_IO
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#ifdef __APPLE__
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#include <AvailabilityMacros.h>
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#include <sys/aio.h>
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#else
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#include <aio.h>
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#endif
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#else
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struct
aiocb
{
// Minimal structure to avoid compiler errors
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int
aio_fildes
;
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void
*
aio_buf
;
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size_t
aio_nbytes
;
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off_t
aio_offset
;
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int
aio_reqprio
;
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struct
sigevent
aio_sigevent
;
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};
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#endif
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// The XrdSfsAIO class is meant to be derived. This object provides the
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// basic interface to handle AIO control block queues not processing.
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//
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class
XrdSfsAio
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{
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public
:
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struct
aiocb
sfsAio
;
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ssize_t
Result
;
// If >= 0 valid result; else is -errno
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const
char
*
TIdent
;
// Trace information (optional)
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// Method to handle completed reads
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//
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virtual
void
doneRead
() = 0;
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// Method to hand completed writes
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//
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virtual
void
doneWrite
() = 0;
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// Method to recycle free object
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//
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virtual
void
Recycle
() = 0;
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XrdSfsAio
() {
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#if defined(__APPLE__) && (!defined(MAC_OS_X_VERSION_10_4) || \
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MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_4)
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sfsAio
.
aio_sigevent
.sigev_value.sigval_ptr = (
void
*)
this
;
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#else
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sfsAio
.
aio_sigevent
.sigev_value.sival_ptr = (
void
*)
this
;
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#endif
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sfsAio
.
aio_sigevent
.sigev_notify = SIGEV_SIGNAL;
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sfsAio
.
aio_reqprio
= 0;
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TIdent
= (
char
*)
""
;
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}
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virtual
~XrdSfsAio
() {}
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};
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#endif
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