cstool/rbuflock.h
Go to the documentation of this file.00001 /* 00002 Copyright (C) 2004 by Jorrit Tyberghein 00003 (C) 2004 by Frank Richter 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Library General Public 00007 License as published by the Free Software Foundation; either 00008 version 2 of the License, or (at your option) any later version. 00009 00010 This library is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 Library General Public License for more details. 00014 00015 You should have received a copy of the GNU Library General Public 00016 License along with this library; if not, write to the Free 00017 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00018 */ 00019 00020 #ifndef __CS_CSTOOL_RBUFLOCK_H__ 00021 #define __CS_CSTOOL_RBUFLOCK_H__ 00022 00027 #include "csutil/ref.h" 00028 #include "ivideo/graph3d.h" 00029 #include "ivideo/rndbuf.h" 00030 00036 template <class T> 00037 class csRenderBufferLock 00038 { 00039 csRef<iRenderBuffer> buffer; 00040 csRenderBufferLockType lockType; 00041 bool isLocked; 00042 T* lockBuf; 00043 00044 csRenderBufferLock() {} 00045 public: 00049 csRenderBufferLock (iRenderBuffer* buf, 00050 csRenderBufferLockType lock = CS_BUF_LOCK_NORMAL) : buffer(buf), 00051 lockType(lock), isLocked(false) 00052 { 00053 } 00054 00058 ~csRenderBufferLock() 00059 { 00060 Unlock(); 00061 } 00062 00064 T* Lock () 00065 { 00066 if (!isLocked) 00067 { 00068 lockBuf = (T*)buffer->Lock (lockType); 00069 isLocked = true; 00070 } 00071 return lockBuf; 00072 } 00073 00075 void Unlock () 00076 { 00077 if (isLocked) 00078 { 00079 buffer->Release(); 00080 isLocked = false; 00081 } 00082 } 00083 00085 operator T* () 00086 { 00087 return Lock(); 00088 } 00089 00091 T& operator [] (int n) 00092 { 00093 return *(Lock() + n); 00094 } 00095 00097 T& Get (int n) 00098 { 00099 return *(Lock() + n); 00100 } 00101 }; 00102 00103 #endif // __CS_CSTOOL_RBUFLOCK_H__
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