ROOT_528-00b_version: net/xrootd/src/xrootd/src/XrdOss/XrdOssMio.hh Source File

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 
00013 //           $Id: XrdOssMio.hh 22437 2008-03-04 14:35:16Z rdm $
00014 
00015 #include "XrdSys/XrdSysError.hh"
00016 #include "XrdOuc/XrdOucHash.hh"
00017 #include "XrdSys/XrdSysPthread.hh"
00018 #include "XrdOss/XrdOssMioFile.hh"
00019 
00020 // The following are options passed to Map()
00021 //
00022 #define OSSMIO_MLOK 0x0001
00023 #define OSSMIO_MMAP 0x0002
00024 #define OSSMIO_MPRM 0x0004
00025   
00026 class XrdOssMio
00027 {
00028 public:
00029 static void           Display(XrdSysError &Eroute);
00030 
00031 static int            getOpts(char *path, int popts);
00032 
00033 static char           isAuto() {return MM_chk;}
00034 
00035 static char           isOn()   {return MM_on;}
00036 
00037 static XrdOssMioFile *Map(char *path, int fd, int opts);
00038 
00039 static void          *preLoad(void *arg);
00040 
00041 static void           Recycle(XrdOssMioFile *mp);
00042 
00043 static void           Set(int V_off, int V_preld,  int V_chklok,
00044                                      int V_chkmap, int V_chkkeep);
00045 
00046 static void           Set(long long V_max);
00047 
00048 private:
00049 static int  Reclaim(off_t amount);
00050 static int  Reclaim(XrdOssMioFile *mp);
00051 
00052 static XrdOucHash<XrdOssMioFile> MM_Hash;
00053 
00054 static XrdSysMutex    MM_Mutex;
00055 static XrdOssMioFile *MM_Perm;
00056 static XrdOssMioFile *MM_Idle;
00057 static XrdOssMioFile *MM_IdleLast;
00058 
00059 static char       MM_on;
00060 static char       MM_chk;
00061 static char       MM_chklok;
00062 static char       MM_chkmap;
00063 static char       MM_chkkeep;
00064 static char       MM_okmlock;
00065 static char       MM_preld;
00066 static long long  MM_max;
00067 static long long  MM_pagsz;
00068 static long long  MM_pages;
00069 static long long  MM_inuse;
00070 };
00071 #endif