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/*
* DNN - Data News Network
*
* by Stephane Chatty and Stephane Sire
*
* Copyright 1993-1996
* Centre d'Etudes de la Navigation Aerienne (CENA)
*
* Multiplexer.
*
* $Id$
* $CurLog$
*/
#ifndef DnnMultiplexer_H_
#define DnnMultiplexer_H_
#include "ccu/Initializer.h"
#include "ccu/List.h"
enum MPX_RES { isMpxEmpty, isMpxTerminated, isMpxError, isMpxAborted };
typedef void (DnnMpxHook) ();
class DnnBaseMultiplexer {
friend void DnnOpen (DnnBaseMultiplexer*);
friend MPX_RES DnnLoop ();
friend void DnnClose ();
public:
static bool ClassInitialized;
static void ClassInit ();
static CcuInitializerFor <DnnBaseMultiplexer> Initializer;
protected:
static CcuList* GlobalHooks;
static CcuList* GlobalFinalHooks;
virtual MPX_RES Loop () = 0;
public:
DnnBaseMultiplexer ();
virtual ~DnnBaseMultiplexer ();
MPX_RES Run ();
virtual void Stop () = 0;
static void AddGlobalHook (DnnMpxHook*, bool = false);
static void RemoveGlobalHook (DnnMpxHook*, bool = false);
virtual void AddHook (DnnMpxHook*, bool = false) = 0;
virtual void RemoveHook (DnnMpxHook*, bool = false) = 0;
virtual void AddFinalHook (DnnMpxHook*) = 0;
virtual void RemoveFinalHook (DnnMpxHook*) = 0;
};
class DnnMultiplexer : public DnnBaseMultiplexer {
protected:
CcuList Hooks;
CcuList FinalHooks;
bool Looping;
void ExecHooks (bool = false);
MPX_RES Loop ();
public:
DnnMultiplexer ();
~DnnMultiplexer ();
void Stop ();
void AddHook (DnnMpxHook*, bool = false);
void RemoveHook (DnnMpxHook*, bool = false);
void AddFinalHook (DnnMpxHook*);
void RemoveFinalHook (DnnMpxHook*);
};
extern DnnBaseMultiplexer* DnnMpx;
extern void DnnOpen (DnnBaseMultiplexer* = 0);
extern MPX_RES DnnLoop ();
extern void DnnStop ();
extern void DnnClose ();
#endif /* DnnMultiplexer_H_ */
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