RWAutoRelease.hGo to the documentation of this file.00001 /* 00002 * Copyright (c) 2000-2003 Barak Weichselbaum <barak@komodia.com> 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 00014 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 00015 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00016 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00017 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 00018 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00019 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00020 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00021 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00022 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00023 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00024 * SUCH DAMAGE. 00025 * 00026 * Contact info: 00027 * ------------- 00028 * 00029 * Site: http://www.komodia.com 00030 * Main contact: barak@komodia.com 00031 * For custom projects, 00032 * consulting, or other 00033 * paid services: sales@komodia.com 00034 */ 00035 00036 #if !defined(AFX_RWAUTORELEASE_H__FB076110_4E72_48F9_8B5C_23777362C277__INCLUDED_) 00037 #define AFX_RWAUTORELEASE_H__FB076110_4E72_48F9_8B5C_23777362C277__INCLUDED_ 00038 00039 #if _MSC_VER > 1000 00040 #pragma once 00041 #endif // _MSC_VER > 1000 00042 00043 #include "KomodiaSettings.h" 00044 00045 KOMODIA_NAMESPACE_START 00046 00047 class CGenericReadWriteLock; 00048 00049 class CRWAutoRelease 00050 { 00051 public: 00052 //Lock for reading 00053 //Returns TRUE for timeout 00054 BOOL LockRead(unsigned long ulMSTimeout=INFINITE); 00055 00056 //Unlock for reading 00057 void UnlockRead(); 00058 00059 //Lock for reading 00060 BOOL LockWrite(); 00061 00062 //Unlock for writing 00063 void UnlockWrite(); 00064 00065 //Escalate write priority 00066 BOOL Escalate(unsigned long ulMSTimeout, 00067 unsigned long ulIterations); 00068 00069 //Remove the escalation flag 00070 void StopEscalation(); 00071 00072 //Ctor and Dtor 00073 //bRead - Lock it for reading 00074 //bLock - Lock it at start 00075 CRWAutoRelease(CGenericReadWriteLock* pLock, 00076 BOOL bRead=TRUE, 00077 BOOL bLock=FALSE); 00078 virtual ~CRWAutoRelease(); 00079 private: 00080 //No copy Ctor 00081 CRWAutoRelease(const CRWAutoRelease& rRelease); 00082 00083 //No copy operator 00084 CRWAutoRelease& operator=(const CRWAutoRelease& rRelease); 00085 00086 //Our class 00087 CGenericReadWriteLock* m_pLock; 00088 00089 //Are we locked for read 00090 BOOL m_bLockedRead; 00091 00092 //Are we locked for write 00093 BOOL m_bLockedWrite; 00094 00095 //Are we escalated 00096 BOOL m_bEscalated; 00097 }; 00098 00099 KOMODIA_NAMESPACE_END 00100 00101 #endif // !defined(AFX_RWAUTORELEASE_H__FB076110_4E72_48F9_8B5C_23777362C277__INCLUDED_) |