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00001 /******************************************************************************** 00002 * * 00003 * Simulated worker thread object * 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 FXNULLTHREAD_H 00023 #define FXNULLTHREAD_H 00024 00025 #ifndef FXRUNNABLE_H 00026 #include "FXRunnable.h" 00027 #endif 00028 namespace FXEX { 00029 00030 /** 00031 * A null thread implements the thread object API, without using OS threads. 00032 * The purpose is to allow the developer to develop using a thread-like environment 00033 * without having to worry about concurrency issues. 00034 * 00035 * It also provides a way for threads to be debugged... 00036 */ 00037 class FXAPI FXNullThread : public FXRunnable { 00038 FXDECLARE_ABSTRACT(FXNullThread) 00039 00040 private: 00041 FXbool running; 00042 FXint idleCount; 00043 FXuint idle; 00044 00045 protected: 00046 FXint stopThread; 00047 00048 public: 00049 enum { 00050 ID_RUN=FXRunnable::ID_LAST, 00051 ID_YIELD, 00052 ID_LAST 00053 }; 00054 00055 public: 00056 long onThreadRun(FXObject*,FXSelector,void*); 00057 long onThreadYield(FXObject*,FXSelector,void*); 00058 00059 protected: 00060 /// This is the ctor you need when you sub-class FXThread 00061 FXNullThread(FXObject *tgt=NULL,FXSelector sel=0); 00062 00063 /// sleep 00064 void sleep(FXint ms=0); 00065 00066 /// yield the cpu 00067 void yield(); 00068 00069 public: 00070 /// start running the object - ptr is some data you may want to pass 00071 void start(); 00072 00073 /// you are meant to overload this in your child thread classes 00074 /// ...if you have one... 00075 virtual void run()=0; 00076 00077 // stop a thread 00078 void stop() { stopThread++; } 00079 00080 // is the thread running 00081 FXbool isRunning(); 00082 00083 // reset the thread 00084 void reset() { stopThread=0; } 00085 00086 /// dtor 00087 virtual ~FXNullThread(); 00088 }; 00089 00090 } // namespace FXEX 00091 #endif // FXNULLTHREAD_H