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csevcord.h00001 /* 00002 Copyright (C) 2000 by Jorrit Tyberghein 00003 Written by Michael Dale Long. 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Library General Public 00007 License as published by the Free Software Foundation; either 00008 version 2 of the License, or (at your option) any later version. 00009 00010 This library is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 Library General Public License for more details. 00014 00015 You should have received a copy of the GNU Library General Public 00016 License along with this library; if not, write to the Free 00017 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00018 */ 00019 00020 #ifndef __CS_CSEVCORD__ 00021 #define __CS_CSEVCORD__ 00022 00023 #include "csutil/scf.h" 00024 #include "iutil/event.h" 00025 struct iEventHandler; 00026 class csEventOutlet; 00027 00028 class csEventCord : public iEventCord 00029 { 00030 protected: 00031 // Pass events to the system queue? 00032 volatile bool pass; 00033 00034 // The category and subcategory of this events on this cord 00035 int category, subcategory; 00036 00037 // Linked list of plugins 00038 struct PluginData 00039 { 00040 iEventHandler *plugin; 00041 int priority; 00042 PluginData *next; 00043 }; 00044 00045 // The cord itself 00046 PluginData *plugins; 00047 00048 // Protection against multiple threads accessing the same cord 00049 volatile int SpinLock; 00050 00051 // Lock the queue for modifications: NESTED CALLS TO LOCK/UNLOCK NOT ALLOWED! 00052 inline void Lock() { while (SpinLock) {} SpinLock++; } 00053 // Unlock the queue 00054 inline void Unlock() { SpinLock--; } 00055 00056 // iEventOutlet places events into cords. 00057 friend class csEventOutlet; 00058 bool Post(iEvent*); 00059 00060 public: 00061 SCF_DECLARE_IBASE; 00062 00064 csEventCord(int category, int subcategory); 00065 00067 virtual int Insert(iEventHandler*, int priority); 00068 00070 virtual void Remove(iEventHandler*); 00071 00073 virtual bool GetPass() const { return pass; } 00074 00076 virtual void SetPass(bool flag) { pass = flag; } 00077 00079 virtual int GetCategory() const { return category; } 00080 00081 // Get the subcategory of this cord. 00082 virtual int GetSubcategory() const { return subcategory; } 00083 }; 00084 00085 #endif // ! __CS_CSEVCORD__ Generated for Crystal Space by doxygen 1.2.5 written by Dimitri van Heesch, ©1997-2000 |