Win32ReadWriteLock.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_WIN32READWRITELOCK_H__C86B09CB_919E_498F_871A_1919E476469A__INCLUDED_) 00037 #define AFX_WIN32READWRITELOCK_H__C86B09CB_919E_498F_871A_1919E476469A__INCLUDED_ 00038 00039 #if _MSC_VER > 1000 00040 #pragma once 00041 #endif // _MSC_VER > 1000 00042 00043 #include "GenericReadWriteLock.h" 00044 00045 KOMODIA_NAMESPACE_START 00046 00047 class CGenericSemaphore; 00048 class CGenericMutex; 00049 00050 class CWin32ReadWriteLock : public CGenericReadWriteLock 00051 { 00052 public: 00053 //Lock for reading 00054 //Returns TRUE for timeout 00055 virtual BOOL LockRead(unsigned long ulMSTimeout=INFINITE); 00056 00057 //Unlock for reading 00058 virtual void UnlockRead(); 00059 00060 //Lock for reading 00061 virtual BOOL LockWrite(); 00062 00063 //Unlock for reading 00064 virtual void UnlockWrite(); 00065 00066 //Escalate write priority 00067 virtual BOOL Escalate(unsigned long ulMSTimeout, 00068 unsigned long ulIterations); 00069 00070 //Remove the escalation flag 00071 virtual void StopEscalation(); 00072 00073 //Ctor and Dtor 00074 CWin32ReadWriteLock(int iMaximumReaders); 00075 virtual ~CWin32ReadWriteLock(); 00076 private: 00077 //No copy ctor 00078 CWin32ReadWriteLock(const CWin32ReadWriteLock& rLock); 00079 00080 //No copy operator 00081 CWin32ReadWriteLock& operator=(const CWin32ReadWriteLock& rLock); 00082 00083 //Our semaphore 00084 CGenericSemaphore* m_pSemaphore; 00085 00086 //Our mutex 00087 CGenericMutex* m_pMutex; 00088 00089 //Do we have a writer 00090 BOOL m_bWriter; 00091 00092 //Do we have escalation 00093 BOOL m_bEscalation; 00094 00095 //Number of readers 00096 int m_iReaders; 00097 }; 00098 00099 KOMODIA_NAMESPACE_END 00100 00101 #endif // !defined(AFX_WIN32READWRITELOCK_H__C86B09CB_919E_498F_871A_1919E476469A__INCLUDED_) |