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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 
00044   struct PluginData
00045   {
00046     iEventHandler *plugin;
00047     int priority;
00048     PluginData *next;
00049   };
00050 
00052   PluginData *plugins;
00053 
00055   volatile int SpinLock;
00056 
00058   inline void Lock() { while (SpinLock) {} SpinLock++; }
00060   inline void Unlock() { SpinLock--; }
00061 
00063   friend class csEventOutlet;
00064   bool Post(iEvent*);
00065 
00066 public:
00067   SCF_DECLARE_IBASE;
00068 
00070   csEventCord(int category, int subcategory);
00071 
00073   virtual ~csEventCord();
00074 
00076   virtual int Insert(iEventHandler*, int priority);
00077 
00079   virtual void Remove(iEventHandler*);
00080 
00082   virtual bool GetPass() const { return pass; }
00083 
00085   virtual void SetPass(bool flag) { pass = flag; }
00086 
00088   virtual int GetCategory() const { return category; }
00089 
00091   virtual int GetSubcategory() const { return subcategory; }
00092 };
00093 
00094 #endif // __CS_CSEVCORD_H__

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