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