1*565d668cSAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*565d668cSAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*565d668cSAndrew Rist * or more contributor license agreements. See the NOTICE file 5*565d668cSAndrew Rist * distributed with this work for additional information 6*565d668cSAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*565d668cSAndrew Rist * to you under the Apache License, Version 2.0 (the 8*565d668cSAndrew Rist * "License"); you may not use this file except in compliance 9*565d668cSAndrew Rist * with the License. You may obtain a copy of the License at 10cdf0e10cSrcweir * 11*565d668cSAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12cdf0e10cSrcweir * 13*565d668cSAndrew Rist * Unless required by applicable law or agreed to in writing, 14*565d668cSAndrew Rist * software distributed under the License is distributed on an 15*565d668cSAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*565d668cSAndrew Rist * KIND, either express or implied. See the License for the 17*565d668cSAndrew Rist * specific language governing permissions and limitations 18*565d668cSAndrew Rist * under the License. 19cdf0e10cSrcweir * 20*565d668cSAndrew Rist *************************************************************/ 21*565d668cSAndrew Rist 22*565d668cSAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir 25cdf0e10cSrcweir #ifndef _SYNCOBJECTS_HXX_ 26cdf0e10cSrcweir #define _SYNCOBJECTS_HXX_ 27cdf0e10cSrcweir 28cdf0e10cSrcweir //------------------------------------------------------------------------ 29cdf0e10cSrcweir // includes 30cdf0e10cSrcweir //------------------------------------------------------------------------ 31cdf0e10cSrcweir 32cdf0e10cSrcweir #include <windows.h> 33cdf0e10cSrcweir 34cdf0e10cSrcweir //------------------------------------------------------------------------ 35cdf0e10cSrcweir // a simple helper template for automatic locking/unlocking 36cdf0e10cSrcweir //------------------------------------------------------------------------ 37cdf0e10cSrcweir 38cdf0e10cSrcweir template< class LOCK > 39cdf0e10cSrcweir class CLockGuard 40cdf0e10cSrcweir { 41cdf0e10cSrcweir public: CLockGuard(LOCK * aLock)42cdf0e10cSrcweir CLockGuard( LOCK* aLock ) : 43cdf0e10cSrcweir m_pLock( aLock ) 44cdf0e10cSrcweir { 45cdf0e10cSrcweir m_pLock->Lock( ); 46cdf0e10cSrcweir } 47cdf0e10cSrcweir ~CLockGuard()48cdf0e10cSrcweir ~CLockGuard( ) 49cdf0e10cSrcweir { 50cdf0e10cSrcweir m_pLock->Unlock( ); 51cdf0e10cSrcweir } 52cdf0e10cSrcweir 53cdf0e10cSrcweir private: 54cdf0e10cSrcweir LOCK* m_pLock; 55cdf0e10cSrcweir }; 56cdf0e10cSrcweir 57cdf0e10cSrcweir //------------------------------------------------------------------------ 58cdf0e10cSrcweir // a interface base class for different locking sub classes 59cdf0e10cSrcweir //------------------------------------------------------------------------ 60cdf0e10cSrcweir 61cdf0e10cSrcweir class CSyncObject 62cdf0e10cSrcweir { 63cdf0e10cSrcweir public: 64cdf0e10cSrcweir virtual ~CSyncObject( ) = 0; 65cdf0e10cSrcweir 66cdf0e10cSrcweir virtual int Lock( ) = 0; 67cdf0e10cSrcweir virtual int Unlock( ) = 0; 68cdf0e10cSrcweir }; 69cdf0e10cSrcweir 70cdf0e10cSrcweir //------------------------------------------------------------------------ 71cdf0e10cSrcweir // if no synchronization is necessary this class will be used 72cdf0e10cSrcweir // declaring the functions as inline safes runtime overhead 73cdf0e10cSrcweir //------------------------------------------------------------------------ 74cdf0e10cSrcweir 75cdf0e10cSrcweir class CNullLock 76cdf0e10cSrcweir { 77cdf0e10cSrcweir public: ~CNullLock()78cdf0e10cSrcweir inline virtual ~CNullLock ( ) {}; Lock()79cdf0e10cSrcweir inline virtual int Lock( ) {}; Unlock()80cdf0e10cSrcweir inline virtual int Unlock() {}; 81cdf0e10cSrcweir }; 82cdf0e10cSrcweir 83cdf0e10cSrcweir //------------------------------------------------------------------------ 84cdf0e10cSrcweir // a minimal wrapper for a win32 critical section 85cdf0e10cSrcweir //------------------------------------------------------------------------ 86cdf0e10cSrcweir 87cdf0e10cSrcweir class CCriticalSection : public CSyncObject 88cdf0e10cSrcweir { 89cdf0e10cSrcweir public: 90cdf0e10cSrcweir CCriticalSection( ); 91cdf0e10cSrcweir virtual ~CCriticalSection( ); 92cdf0e10cSrcweir 93cdf0e10cSrcweir // both functions return always 0 94cdf0e10cSrcweir // because the win32 critsec functions 95cdf0e10cSrcweir // don't return any return code 96cdf0e10cSrcweir virtual int Lock( ); 97cdf0e10cSrcweir virtual int Unlock( ); 98cdf0e10cSrcweir 99cdf0e10cSrcweir private: 100cdf0e10cSrcweir CRITICAL_SECTION m_critSec; 101cdf0e10cSrcweir }; 102cdf0e10cSrcweir 103cdf0e10cSrcweir 104cdf0e10cSrcweir typedef CLockGuard< CSyncObject > SyncObjLockGuard_t; 105cdf0e10cSrcweir 106cdf0e10cSrcweir #endif 107