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csutil/csevcord.h

00001 /*
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_H__
00021 #define __CS_CSEVCORD_H__
00022 
00023 #include "csextern.h"
00024 #include "scf.h"
00025 #include "iutil/event.h"
00026 struct iEventHandler;
00027 class csEventOutlet;
00028 
00032 class CS_CSUTIL_EXPORT csEventCord : public iEventCord
00033 {
00034 protected:
00036   volatile bool pass;
00037 
00039   int category, subcategory;
00040 
00042   struct PluginData
00043   {
00044     iEventHandler *plugin;
00045     int priority;
00046     PluginData *next;
00047   };
00048 
00050   PluginData *plugins;
00051 
00053   volatile int SpinLock;
00054 
00056   inline void Lock() { while (SpinLock) {} SpinLock++; }
00058   inline void Unlock() { SpinLock--; }
00059 
00061   friend class csEventOutlet;
00062   bool Post(iEvent*);
00063 
00064 public:
00065   SCF_DECLARE_IBASE;
00066 
00068   csEventCord(int category, int subcategory);
00069 
00071   virtual ~csEventCord();
00072 
00074   virtual int Insert(iEventHandler*, int priority);
00075 
00077   virtual void Remove(iEventHandler*);
00078 
00080   virtual bool GetPass() const { return pass; }
00081 
00083   virtual void SetPass(bool flag) { pass = flag; }
00084 
00086   virtual int GetCategory() const { return category; }
00087 
00089   virtual int GetSubcategory() const { return subcategory; }
00090 };
00091 
00092 #endif // __CS_CSEVCORD_H__

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