Win32Semaphore.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 "Win32Semaphore.h" 00038 00039 #ifdef _MEMORY_DEBUG 00040 #define new DEBUG_NEW 00041 #define malloc DEBUG_MALLOC 00042 static char THIS_FILE[] = __FILE__; 00043 #endif 00044 00045 KOMODIA_NAMESPACE_START 00046 00047 CWin32Semaphore::CWin32Semaphore(long lInitialCount,long lMaxCount,const char* pSemaphoreName) : CGenericSemaphore(lInitialCount,lMaxCount,pSemaphoreName), 00048 m_hSemaphore(0), 00049 m_bDontDelete(FALSE) 00050 { 00051 //Create the semaphore 00052 m_hSemaphore=CreateSemaphore(NULL, 00053 lInitialCount, 00054 lMaxCount, 00055 pSemaphoreName); 00056 00057 //Check if we are the owners 00058 if (pSemaphoreName && 00059 GetLastError()!=ERROR_ALREADY_EXISTS) 00060 SetFirst(); 00061 } 00062 00063 CWin32Semaphore::~CWin32Semaphore() 00064 { 00065 if (m_hSemaphore) 00066 //Close the semaphore 00067 CloseHandle(m_hSemaphore); 00068 } 00069 00070 BOOL CWin32Semaphore::Aquire(unsigned long ulMSTimeout) 00071 { 00072 DWORD dwWaitResult; 00073 00074 //Wait for the semaphore 00075 dwWaitResult=WaitForSingleObject(m_hSemaphore,ulMSTimeout); 00076 00077 //Check why did we quit 00078 return dwWaitResult==WAIT_TIMEOUT; 00079 } 00080 00081 long CWin32Semaphore::Release(long lAmount) 00082 { 00083 long lOld; 00084 BOOL bResult; 00085 00086 //Release it 00087 bResult=ReleaseSemaphore(m_hSemaphore,lAmount,&lOld); 00088 00089 //Check if it's an error 00090 if (bResult) 00091 return lOld; 00092 else 00093 return -1; 00094 } 00095 00096 HANDLE CWin32Semaphore::GetHandle()const 00097 { 00098 return m_hSemaphore; 00099 } 00100 00101 void CWin32Semaphore::ReleaseObject() 00102 { 00103 Release(); 00104 } 00105 00106 KOMODIA_NAMESPACE_END |