00001 #ifndef __XRDPOSIXOBJGUARD_HH__ 00002 #define __XRDPOSIXOBJGUARD_HH__ 00003 /******************************************************************************/ 00004 /* */ 00005 /* X r d P o s i x O b j G u a r d . h h */ 00006 /* */ 00007 /* (c) 2016 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 "XrdPosix/XrdPosixFile.hh" 00034 00035 class XrdPosixObjGuard 00036 { 00037 public: 00038 00039 void Init(XrdPosixFile *fP) 00040 {if (guardP) 00041 {guardP->unRef(); 00042 guardP->updUnLock(); 00043 } 00044 guardP = fP; 00045 guardP->Ref(); 00046 guardP->updLock(); 00047 } 00048 00049 void Release() {if (guardP) 00050 {guardP->unRef(); 00051 guardP->updUnLock(); 00052 guardP = 0; 00053 } 00054 } 00055 00056 XrdPosixObjGuard(XrdPosixFile *fP): guardP(0) {Init(fP);} 00057 ~XrdPosixObjGuard() {Release();} 00058 00059 private: 00060 XrdPosixFile *guardP; 00061 }; 00062 #endif