#ifndef __SUT_CACHE_H__ #define __SUT_CACHE_H__ /******************************************************************************/ /* */ /* X r d S u t C a c h e . h h */ /* */ /* (c) 2004 by the Board of Trustees of the Leland Stanford, Jr., University */ /* Produced by Gerri Ganis for CERN */ /* */ /* This file is part of the XRootD software suite. */ /* */ /* XRootD is free software: you can redistribute it and/or modify it under */ /* the terms of the GNU Lesser General Public License as published by the */ /* Free Software Foundation, either version 3 of the License, or (at your */ /* option) any later version. */ /* */ /* XRootD is distributed in the hope that it will be useful, but WITHOUT */ /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ /* License for more details. */ /* */ /* You should have received a copy of the GNU Lesser General Public License */ /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */ /* COPYING (GPL license). If not, see . */ /* */ /* The copyright holder's institutional names and contributor's names may not */ /* be used to endorse or promote products derived from this software without */ /* specific prior written permission of the institution or contributor. */ /******************************************************************************/ #include "XProtocol/XPtypes.hh" #include "XrdSut/XrdSutPFEntry.hh" #include "XrdOuc/XrdOucHash.hh" #include "XrdOuc/XrdOucString.hh" #include "XrdSys/XrdSysPthread.hh" /******************************************************************************/ /* */ /* For caching temporary information during the authentication handshake */ /* */ /******************************************************************************/ class XrdSutPFCacheRef { public: inline void Lock(XrdSysMutex *Mutex) {if (mtx) {if (mtx != Mutex) mtx->UnLock(); else return; } Mutex->Lock(); mtx = Mutex; }; inline void Set(XrdSysMutex *Mutex) {if (mtx) {if (mtx != Mutex) mtx->UnLock(); else return; } mtx = Mutex; }; inline void UnLock() {if (mtx) {mtx->UnLock(); mtx = 0;}} XrdSutPFCacheRef() : mtx(0) {} ~XrdSutPFCacheRef() {if (mtx) UnLock();} protected: XrdSysMutex *mtx; }; class XrdSutPFCache { private: XrdSysRWLock rwlock; // Access synchronizator int cachesz; // Number of entries allocated int cachemx; // Largest Index of allocated entries XrdSutPFEntry **cachent; // Pointers to filled entries kXR_int32 utime; // time at which was last updated int lifetime; // lifetime (in secs) of the cache info XrdOucHash hashtable; // Reflects the file index structure kXR_int32 htmtime; // time at which hash table was last rebuild XrdOucString pfile; // file name (if loaded from file) bool isinit; // true if already initialized XrdSutPFEntry *Get(const char *ID, bool *wild); bool Delete(XrdSutPFEntry *pfEnt); static const int maxTries = 100; // Max time to try getting a lock static const int retryMSW = 300; // Milliseconds to wait to get lock public: XrdSutPFCache() { cachemx = -1; cachesz = 0; cachent = 0; lifetime = 300; utime = -1; htmtime = -1; pfile = ""; isinit = 0; } virtual ~XrdSutPFCache(); // Status int Entries() const { return (cachemx+1); } bool Empty() const { return (cachemx == -1); } // Initialization methods int Init(int capacity = 100, bool lock = 1); int Reset(int newsz = -1, bool lock = 1); int Load(const char *pfname); // build cache of a pwd file int Flush(const char *pfname = 0); // flush content to pwd file int Refresh(); // refresh content from source file int Rehash(bool force = 0, bool lock = 1); // (re)build hash table void SetLifetime(int lifet = 300) { lifetime = lifet; } // Cache management XrdSutPFEntry *Get(int i) const { return (i<=cachemx) ? cachent[i] : (XrdSutPFEntry *)0; } XrdSutPFEntry *Get(XrdSutPFCacheRef &urRef, const char *ID, bool *wild = 0); XrdSutPFEntry *Add(XrdSutPFCacheRef &urRef, const char *ID, bool force = 0); bool Remove(const char *ID, int opt = 1); int Trim(int lifet = 0); // For debug purposes void Dump(const char *msg= 0); }; #endif