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00001 /******************************************************************************** 00002 * * 00003 * Interlocking object (a semaphore) * 00004 * * 00005 ********************************************************************************* 00006 * Copyright (C) 2003 by Mathew Robertson. All Rights Reserved. * 00007 ********************************************************************************* 00008 * This library is free software; you can redistribute it and/or * 00009 * modify it under the terms of the GNU Lesser General Public * 00010 * License as published by the Free Software Foundation; either * 00011 * version 2.1 of the License, or (at your option) any later version. * 00012 * * 00013 * This library is distributed in the hope that it will be useful, * 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * 00016 * Lesser General Public License for more details. * 00017 * * 00018 * You should have received a copy of the GNU Lesser General Public * 00019 * License along with this library; if not, write to the Free Software * 00020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * 00021 *********************************************************************************/ 00022 #ifndef FXINTERLOCK_H 00023 #define FXINTERLOCK_H 00024 00025 #ifndef FXWAITABLE_H 00026 #include "FXWaitable.h" 00027 #endif 00028 namespace FXEX{ 00029 00030 /** 00031 * A base class for controlling sequenced events 00032 */ 00033 class FXAPI FXInterlock : public FXWaitable { 00034 FXDECLARE(FXInterlock) 00035 00036 private: 00037 FXThreadSemaphore semaphore; // interlockable object 00038 FXint wait_; // wait count 00039 00040 private: 00041 // dummy copy constructor and operator= to prevent copying 00042 FXInterlock(const FXInterlock&); 00043 FXInterlock& operator=(const FXInterlock&); 00044 00045 public: 00046 // ctor 00047 FXInterlock(FXObject *tgt=NULL,FXSelector sel=0); 00048 00049 /// wait indefinately 00050 void wait(); 00051 00052 /// wait for some condition, or time out 00053 FXbool trywait(FXuint ms); 00054 00055 /// activate object to stop waiting 00056 void activate(); 00057 00058 /// activate all objects to stop waiting 00059 void activateAll(); 00060 00061 /// get the current value of the wait counter 00062 FXint getWaitCount(); 00063 00064 /// dtor 00065 virtual ~FXInterlock(); 00066 }; 00067 00068 } // namespace FXEX 00069 #endif // FXINTERLOCK_H