xrootd/XrdSfs/XrdSfsAio.hh

0001 #ifndef __SFS_AIO_H__
0002 #define __SFS_AIO_H__
0003 /******************************************************************************/
0004 /*                                                                            */
0005 /*                          X r d S f s A i o . h h                           */
0006 /*                                                                            */
0007 /* (c) 2004 by the Board of Trustees of the Leland Stanford, Jr., University  */
0008 /*   Produced by Andrew Hanushevsky for Stanford University under contract    */
0009 /*              DE-AC02-76-SFO0515 with the Department of Energy              */
0010 /*                                                                            */
0011 /* This file is part of the XRootD software suite.                            */
0012 /*                                                                            */
0013 /* XRootD is free software: you can redistribute it and/or modify it under    */
0014 /* the terms of the GNU Lesser General Public License as published by the     */
0015 /* Free Software Foundation, either version 3 of the License, or (at your     */
0016 /* option) any later version.                                                 */
0017 /*                                                                            */
0018 /* XRootD is distributed in the hope that it will be useful, but WITHOUT      */
0019 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or      */
0020 /* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public       */
0021 /* License for more details.                                                  */
0022 /*                                                                            */
0023 /* You should have received a copy of the GNU Lesser General Public License   */
0024 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file  */
0025 /* COPYING (GPL license).  If not, see <http://www.gnu.org/licenses/>.        */
0026 /*                                                                            */
0027 /* The copyright holder's institutional names and contributor's names may not */
0028 /* be used to endorse or promote products derived from this software without  */
0029 /* specific prior written permission of the institution or contributor.       */
0030 /******************************************************************************/
0031
0032 #include <cstdint>
0033 #include <signal.h>
0034 #include <sys/types.h>
0035 // _POSIX_ASYNCHRONOUS_IO, if it is defined, is in unistd.h.
0036 #include <unistd.h>
0037 #ifdef _POSIX_ASYNCHRONOUS_IO
0038 #ifdef __APPLE__
0039 #include <AvailabilityMacros.h>
0040 #include <sys/aio.h>
0041 #else
0042 #include <aio.h>
0043 #endif
0044 #else
0045 struct aiocb {           // Minimal structure to avoid compiler errors
0046        int    aio_fildes;
0047        void  *aio_buf;
0048        size_t aio_nbytes;
0049        off_t  aio_offset;
0050        int    aio_reqprio;
0051        struct sigevent aio_sigevent;
0052       };
0053 #endif
0054
0055 // The XrdSfsAIO class is meant to be derived. This object provides the
0056 // basic interface to handle AIO control block queues not processing.
0057 //
0058 class XrdSfsAio
0059 {
0060 public:
0061
0062 struct aiocb  sfsAio;
0063 uint32_t     *cksVec; // For pgRead and pgWrite
0064
0065 ssize_t      Result; // If >= 0 valid result; else is -errno
0066
0067 const char  *TIdent; // Trace information (optional)
0068
0069 // Method to handle completed reads
0070 //
0071 virtual void doneRead() = 0;
0072
0073 // Method to hand completed writes
0074 //
0075 virtual void doneWrite() = 0;
0076
0077 // Method to recycle free object
0078 //
0079 virtual void Recycle() = 0;
0080
0081              XrdSfsAio() {
0082 #if defined(__APPLE__) && (!defined(MAC_OS_X_VERSION_10_4) || \
0083     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_4)
0084                          sfsAio.aio_sigevent.sigev_value.sigval_ptr = (void *)this;
0085 #else
0086                          sfsAio.aio_sigevent.sigev_value.sival_ptr  = (void *)this;
0087 #endif
0088                          sfsAio.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
0089                          sfsAio.aio_reqprio = 0;
0090                          cksVec = 0;
0091                          TIdent = "";
0092                         }
0093 virtual     ~XrdSfsAio() {}
0094 };
0095 #endif