00001 #ifndef __XrdBuffXL_H__ 00002 #define __XrdBuffXL_H__ 00003 /******************************************************************************/ 00004 /* */ 00005 /* X r d B u f f X L . h h */ 00006 /* */ 00007 /* (c) 2015 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 "XrdBuffer.hh" 00033 #include "XrdSys/XrdSysPthread.hh" 00034 00035 // There should be only one instance of this class. 00036 // 00037 class XrdBuffXL 00038 { 00039 public: 00040 00041 void Init(int maxMSZ); 00042 00043 XrdBuffer *Obtain(int bsz); 00044 00045 int Recalc(int bsz); 00046 00047 void Release(XrdBuffer *bp); 00048 00049 int MaxSize() {return maxsz;} 00050 00051 void Trim(); 00052 00053 int Stats(char *buff, int blen, int do_sync=0); 00054 00055 XrdBuffXL(); 00056 00057 ~XrdBuffXL() {} // The buffmanager is never deleted 00058 00059 private: 00060 00061 XrdSysMutex slotXL; 00062 00063 struct BuckVec 00064 {XrdBuffer *bnext; 00065 int numbuf; 00066 int numreq; 00067 BuckVec() : bnext(0), numbuf(0), numreq(0) {} 00068 ~BuckVec() {} // Never gets deleted 00069 }; 00070 00071 BuckVec *bucket; // 4M**(0 ... slots-1) sized buffers 00072 long long totalo; 00073 00074 const int pagsz; 00075 int slots; 00076 int maxsz; 00077 int totreq; 00078 int totbuf; 00079 }; 00080 #endif