1*cdf0e10cSrcweir /************************************************************************* 2*cdf0e10cSrcweir * 3*cdf0e10cSrcweir * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4*cdf0e10cSrcweir * 5*cdf0e10cSrcweir * Copyright 2000, 2010 Oracle and/or its affiliates. 6*cdf0e10cSrcweir * 7*cdf0e10cSrcweir * OpenOffice.org - a multi-platform office productivity suite 8*cdf0e10cSrcweir * 9*cdf0e10cSrcweir * This file is part of OpenOffice.org. 10*cdf0e10cSrcweir * 11*cdf0e10cSrcweir * OpenOffice.org is free software: you can redistribute it and/or modify 12*cdf0e10cSrcweir * it under the terms of the GNU Lesser General Public License version 3 13*cdf0e10cSrcweir * only, as published by the Free Software Foundation. 14*cdf0e10cSrcweir * 15*cdf0e10cSrcweir * OpenOffice.org is distributed in the hope that it will be useful, 16*cdf0e10cSrcweir * but WITHOUT ANY WARRANTY; without even the implied warranty of 17*cdf0e10cSrcweir * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18*cdf0e10cSrcweir * GNU Lesser General Public License version 3 for more details 19*cdf0e10cSrcweir * (a copy is included in the LICENSE file that accompanied this code). 20*cdf0e10cSrcweir * 21*cdf0e10cSrcweir * You should have received a copy of the GNU Lesser General Public License 22*cdf0e10cSrcweir * version 3 along with OpenOffice.org. If not, see 23*cdf0e10cSrcweir * <http://www.openoffice.org/license.html> 24*cdf0e10cSrcweir * for a copy of the LGPLv3 License. 25*cdf0e10cSrcweir * 26*cdf0e10cSrcweir ************************************************************************/ 27*cdf0e10cSrcweir 28*cdf0e10cSrcweir #ifndef __FRAMEWORK_THREADHELP_IRWLOCK_H_ 29*cdf0e10cSrcweir #define __FRAMEWORK_THREADHELP_IRWLOCK_H_ 30*cdf0e10cSrcweir 31*cdf0e10cSrcweir //_________________________________________________________________________________________________________________ 32*cdf0e10cSrcweir // includes 33*cdf0e10cSrcweir //_________________________________________________________________________________________________________________ 34*cdf0e10cSrcweir 35*cdf0e10cSrcweir //_________________________________________________________________________________________________________________ 36*cdf0e10cSrcweir // namespace 37*cdf0e10cSrcweir //_________________________________________________________________________________________________________________ 38*cdf0e10cSrcweir 39*cdf0e10cSrcweir namespace framework{ 40*cdf0e10cSrcweir 41*cdf0e10cSrcweir //_________________________________________________________________________________________________________________ 42*cdf0e10cSrcweir // declarations 43*cdf0e10cSrcweir //_________________________________________________________________________________________________________________ 44*cdf0e10cSrcweir 45*cdf0e10cSrcweir /*-************************************************************************************************************//** 46*cdf0e10cSrcweir @descr A guard (specialy a write guard) support different internal working states. 47*cdf0e10cSrcweir His lock can set for reading or writing/reading! Or he was unlocked by user ... 48*cdf0e10cSrcweir *//*-*************************************************************************************************************/ 49*cdf0e10cSrcweir enum ELockMode 50*cdf0e10cSrcweir { 51*cdf0e10cSrcweir E_NOLOCK , 52*cdf0e10cSrcweir E_READLOCK , 53*cdf0e10cSrcweir E_WRITELOCK 54*cdf0e10cSrcweir }; 55*cdf0e10cSrcweir 56*cdf0e10cSrcweir /*-************************************************************************************************************//** 57*cdf0e10cSrcweir @descr We implement two guards for using an rw-lock. But if you wish to implement 58*cdf0e10cSrcweir different rw-locks to you will have problems by using with same guard implementation! 59*cdf0e10cSrcweir Thats why we define this "pure virtual base class" ... 60*cdf0e10cSrcweir All rw-locks must support this base interface for working and all guard must use this one too! 61*cdf0e10cSrcweir *//*-*************************************************************************************************************/ 62*cdf0e10cSrcweir class IRWLock 63*cdf0e10cSrcweir { 64*cdf0e10cSrcweir //------------------------------------------------------------------------------------------------------------- 65*cdf0e10cSrcweir // public methods 66*cdf0e10cSrcweir //------------------------------------------------------------------------------------------------------------- 67*cdf0e10cSrcweir public: 68*cdf0e10cSrcweir 69*cdf0e10cSrcweir /*-****************************************************************************************************//** 70*cdf0e10cSrcweir @descr These functions must be supported by a derived class! 71*cdf0e10cSrcweir acquireReadAccess() -try to register thread as reader 72*cdf0e10cSrcweir releaseReadAccess() -unregister thread as reader 73*cdf0e10cSrcweir acquireWriteAccess() -try to register thread as writer 74*cdf0e10cSrcweir releaseWriteAccess() -unregister thread as writer 75*cdf0e10cSrcweir downgradeWriteAccess() -make writer to reader 76*cdf0e10cSrcweir *//*-*****************************************************************************************************/ 77*cdf0e10cSrcweir virtual void acquireReadAccess () =0; 78*cdf0e10cSrcweir virtual void releaseReadAccess () =0; 79*cdf0e10cSrcweir virtual void acquireWriteAccess () =0; 80*cdf0e10cSrcweir virtual void releaseWriteAccess () =0; 81*cdf0e10cSrcweir virtual void downgradeWriteAccess () =0; 82*cdf0e10cSrcweir 83*cdf0e10cSrcweir }; // class IRWLock 84*cdf0e10cSrcweir 85*cdf0e10cSrcweir } // namespace framework 86*cdf0e10cSrcweir 87*cdf0e10cSrcweir #endif // #ifndef __FRAMEWORK_THREADHELP_IRWLOCK_H_ 88