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# csutil/csevcord.h

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    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
    00027 #include "csextern.h"
    00028 #include "csutil/scf_implementation.h"
    00029 #include "iutil/event.h"
    00030
    00031 struct iEventHandler;
    00032
    00033 class csEventOutlet;
    00034
    00038 class CS_CRYSTALSPACE_EXPORT csEventCord :
    00039   public scfImplementation1<csEventCord, iEventCord>
    00040 {
    00041 protected:
    00043   volatile bool pass;
    00044
    00046   csEventID name;
    00047
    00051   struct PluginData
    00052   {
    00053     iEventHandler *plugin;
    00054     int priority;
    00055     PluginData *next;
    00056   };
    00057
    00059   PluginData *plugins;
    00060
    00062   volatile int SpinLock;
    00063
    00065   inline void Lock() { while (SpinLock) {} SpinLock++; }
    00067   inline void Unlock() { SpinLock--; }
    00068
    00070   friend class csEventOutlet;
    00071   bool Post(iEvent*);
    00072
    00073 public:
    00075   csEventCord(csEventID, bool=false);
    00076
    00078   virtual ~csEventCord();
    00079
    00081   virtual int Insert(iEventHandler*, int priority);
    00082
    00084   virtual void Remove(iEventHandler*);
    00085
    00087   virtual bool GetPass() const { return pass; }
    00088
    00090   virtual void SetPass(bool flag) { pass = flag; }
    00091
    00093   virtual csEventID GetName() const { return name; }
    00094 };
    00095
    00096 #endif // __CS_CSEVCORD_H__