Win32Mutex.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 "Win32Mutex.h" 00038 00039 #include <string> 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 CWin32Mutex::CWin32Mutex(const char* pMutexName) : CGenericMutex(pMutexName), 00050 m_hMutex(NULL) 00051 { 00052 //Try to create the mutex 00053 m_hMutex=CreateMutex(NULL, 00054 FALSE, 00055 pMutexName); 00056 00057 //Did we create the mutex? 00058 if (!m_hMutex) 00059 throw std::string("Failed to create mutex!"); 00060 00061 //Check if we are the owners 00062 if (pMutexName && 00063 GetLastError()!=ERROR_ALREADY_EXISTS) 00064 SetFirst(); 00065 } 00066 00067 CWin32Mutex::~CWin32Mutex() 00068 { 00069 //Delete the mutex 00070 if (m_hMutex) 00071 CloseHandle(m_hMutex); 00072 } 00073 00074 BOOL CWin32Mutex::Aquire(unsigned long ulMSTimeout) 00075 { 00076 DWORD dwWaitResult; 00077 00078 //Wait for the mutex 00079 dwWaitResult=WaitForSingleObject(m_hMutex, 00080 ulMSTimeout); 00081 00082 //Check why did we quit 00083 return dwWaitResult==WAIT_TIMEOUT; 00084 } 00085 00086 BOOL CWin32Mutex::Release() 00087 { 00088 //Release the mutex 00089 return ReleaseMutex(m_hMutex)!=0; 00090 } 00091 00092 HANDLE CWin32Mutex::GetHandle()const 00093 { 00094 return m_hMutex; 00095 } 00096 00097 void CWin32Mutex::ReleaseObject() 00098 { 00099 Release(); 00100 } 00101 00102 KOMODIA_NAMESPACE_END |