00001 #ifndef __SFS_AIO_H__ 00002 #define __SFS_AIO_H__ 00003 /******************************************************************************/ 00004 /* */ 00005 /* X r d S f s A i o . h h */ 00006 /* */ 00007 /* (c) 2004 by the Board of Trustees of the Leland Stanford, Jr., University */ 00008 /* Produced by Andrew Hanushevsky for Stanford University under contract */ 00009 /* DE-AC02-76-SFO0515 with the Department of Energy */ 00010 /* */ 00011 /* This file is part of the XRootD software suite. */ 00012 /* */ 00013 /* XRootD is free software: you can redistribute it and/or modify it under */ 00014 /* the terms of the GNU Lesser General Public License as published by the */ 00015 /* Free Software Foundation, either version 3 of the License, or (at your */ 00016 /* option) any later version. */ 00017 /* */ 00018 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */ 00019 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ 00020 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ 00021 /* License for more details. */ 00022 /* */ 00023 /* You should have received a copy of the GNU Lesser General Public License */ 00024 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */ 00025 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */ 00026 /* */ 00027 /* The copyright holder's institutional names and contributor's names may not */ 00028 /* be used to endorse or promote products derived from this software without */ 00029 /* specific prior written permission of the institution or contributor. */ 00030 /******************************************************************************/ 00031 00032 #include <signal.h> 00033 #include <sys/types.h> 00034 // _POSIX_ASYNCHRONOUS_IO, if it is defined, is in unistd.h. 00035 #include <unistd.h> 00036 #ifdef _POSIX_ASYNCHRONOUS_IO 00037 #ifdef __APPLE__ 00038 #include <AvailabilityMacros.h> 00039 #include <sys/aio.h> 00040 #else 00041 #include <aio.h> 00042 #endif 00043 #else 00044 struct aiocb { // Minimal structure to avoid compiler errors 00045 int aio_fildes; 00046 void *aio_buf; 00047 size_t aio_nbytes; 00048 off_t aio_offset; 00049 int aio_reqprio; 00050 struct sigevent aio_sigevent; 00051 }; 00052 #endif 00053 00054 // The XrdSfsAIO class is meant to be derived. This object provides the 00055 // basic interface to handle AIO control block queues not processing. 00056 // 00057 class XrdSfsAio 00058 { 00059 public: 00060 00061 struct aiocb sfsAio; 00062 00063 ssize_t Result; // If >= 0 valid result; else is -errno 00064 00065 const char *TIdent; // Trace information (optional) 00066 00067 // Method to handle completed reads 00068 // 00069 virtual void doneRead() = 0; 00070 00071 // Method to hand completed writes 00072 // 00073 virtual void doneWrite() = 0; 00074 00075 // Method to recycle free object 00076 // 00077 virtual void Recycle() = 0; 00078 00079 XrdSfsAio() { 00080 #if defined(__APPLE__) && (!defined(MAC_OS_X_VERSION_10_4) || \ 00081 MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_4) 00082 sfsAio.aio_sigevent.sigev_value.sigval_ptr = (void *)this; 00083 #else 00084 sfsAio.aio_sigevent.sigev_value.sival_ptr = (void *)this; 00085 #endif 00086 sfsAio.aio_sigevent.sigev_notify = SIGEV_SIGNAL; 00087 sfsAio.aio_reqprio = 0; 00088 TIdent = (char *)""; 00089 } 00090 virtual ~XrdSfsAio() {} 00091 }; 00092 #endif