MutexAutoRelease.cppGo 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 #include "stdafx.h" 00037 #include "MutexAutoRelease.h" 00038 00039 #include "GenericMutex.h" 00040 00041 #ifdef _MEMORY_DEBUG 00042 #define new DEBUG_NEW 00043 #define malloc DEBUG_MALLOC 00044 static char THIS_FILE[] = __FILE__; 00045 #endif 00046 00047 KOMODIA_NAMESPACE_START 00048 00049 CMutexAutoRelease::CMutexAutoRelease(CGenericMutex* pMutex, 00050 BOOL bLock, 00051 unsigned long ulMSTimeout) : m_pMutex(pMutex), 00052 m_ulEntryCount(0) 00053 { 00054 if (bLock) 00055 Aquire(ulMSTimeout); 00056 } 00057 00058 CMutexAutoRelease::~CMutexAutoRelease() 00059 { 00060 //Check if valid 00061 if (m_pMutex) 00062 //How many entries 00063 for (unsigned long ulCounter=0;ulCounter<m_ulEntryCount;++ulCounter) 00064 m_pMutex->Release(); 00065 } 00066 00067 BOOL CMutexAutoRelease::Aquire(unsigned long ulMSTimeout) 00068 { 00069 if (m_pMutex) 00070 //Lock it 00071 if (m_pMutex->Aquire(ulMSTimeout)) 00072 return TRUE; 00073 else 00074 { 00075 //Increase the count 00076 ++m_ulEntryCount; 00077 00078 //And exit 00079 return FALSE; 00080 } 00081 else 00082 return FALSE; 00083 } 00084 00085 BOOL CMutexAutoRelease::Release() 00086 { 00087 if (m_pMutex && m_ulEntryCount) 00088 { 00089 //Decrease the count 00090 --m_ulEntryCount; 00091 00092 //Try to release 00093 if (!m_pMutex->Release()) 00094 { 00095 //Increase the count 00096 ++m_ulEntryCount; 00097 00098 //Exit 00099 return FALSE; 00100 } 00101 else 00102 return TRUE; 00103 } 00104 else 00105 return TRUE; 00106 } 00107 00108 KOMODIA_NAMESPACE_END |