00001 #ifndef __XRDOSSMIO_H__ 00002 #define __XRDOSSMIO_H__ 00003 /******************************************************************************/ 00004 /* */ 00005 /* X r d o s s M i o . h h */ 00006 /* */ 00007 /* (c) 2005 by the Board of Trustees of the Leland Stanford, Jr., University */ 00008 /* All Rights Reserved */ 00009 /* Produced by Andrew Hanushevsky for Stanford University under contract */ 00010 /* DE-AC02-76-SFO0515 with the Department of Energy */ 00011 /* */ 00012 /* This file is part of the XRootD software suite. */ 00013 /* */ 00014 /* XRootD is free software: you can redistribute it and/or modify it under */ 00015 /* the terms of the GNU Lesser General Public License as published by the */ 00016 /* Free Software Foundation, either version 3 of the License, or (at your */ 00017 /* option) any later version. */ 00018 /* */ 00019 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */ 00020 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ 00021 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ 00022 /* License for more details. */ 00023 /* */ 00024 /* You should have received a copy of the GNU Lesser General Public License */ 00025 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */ 00026 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */ 00027 /* */ 00028 /* The copyright holder's institutional names and contributor's names may not */ 00029 /* be used to endorse or promote products derived from this software without */ 00030 /* specific prior written permission of the institution or contributor. */ 00031 /******************************************************************************/ 00032 00033 #include "XrdSys/XrdSysError.hh" 00034 #include "XrdOuc/XrdOucHash.hh" 00035 #include "XrdSys/XrdSysPthread.hh" 00036 #include "XrdOss/XrdOssMioFile.hh" 00037 00038 // The following are options passed to Map() 00039 // 00040 #define OSSMIO_MLOK 0x0001 00041 #define OSSMIO_MMAP 0x0002 00042 #define OSSMIO_MPRM 0x0004 00043 00044 class XrdOssMio 00045 { 00046 public: 00047 static void Display(XrdSysError &Eroute); 00048 00049 static char isAuto() {return MM_chk;} 00050 00051 static char isOn() {return MM_on;} 00052 00053 static XrdOssMioFile *Map(char *path, int fd, int opts); 00054 00055 static void *preLoad(void *arg); 00056 00057 static void Recycle(XrdOssMioFile *mp); 00058 00059 static void Set(int V_off, int V_preld, int V_check); 00060 00061 static void Set(long long V_max); 00062 00063 private: 00064 static int Reclaim(off_t amount); 00065 static int Reclaim(XrdOssMioFile *mp); 00066 00067 static XrdOucHash<XrdOssMioFile> MM_Hash; 00068 00069 static XrdSysMutex MM_Mutex; 00070 static XrdOssMioFile *MM_Perm; 00071 static XrdOssMioFile *MM_Idle; 00072 static XrdOssMioFile *MM_IdleLast; 00073 00074 static char MM_on; 00075 static char MM_chk; 00076 static char MM_okmlock; 00077 static char MM_preld; 00078 static long long MM_max; 00079 static long long MM_pagsz; 00080 static long long MM_pages; 00081 static long long MM_inuse; 00082 }; 00083 #endif