tinterruptmanager.h

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// Class for handling interrupts.
// Copyright (c) National Instruments 2008.  All Rights Reserved.

#ifndef __tInterruptManager_h__
#define __tInterruptManager_h__

#include "NiRio.h"
#include "tSystem.h"
#include <semLib.h>

namespace nFPGA
{

typedef void (*tInterruptHandler)(tNIRIO_u32 interruptAssertedMask, void *param);

class tInterruptManager : public tSystem
{
public:
   tInterruptManager(tNIRIO_u32 interruptMask, bool watcher, tRioStatusCode *status);
   ~tInterruptManager();
   void registerHandler(tInterruptHandler handler, void *param, tRioStatusCode *status);
   tNIRIO_u32 watch(tNIRIO_i32 timeoutInMs, tRioStatusCode *status);
   void enable(tRioStatusCode *status);
   void disable(tRioStatusCode *status);
   bool isEnabled(tRioStatusCode *status);
private:
   void handler();
   static int handlerWrapper(tInterruptManager *pInterrupt);

   void acknowledge(tRioStatusCode *status);
   void reserve(tRioStatusCode *status);
   void unreserve(tRioStatusCode *status);
   tInterruptHandler _handler;
   tNIRIO_u32 _interruptMask;
   tNIRIO_i32 _taskId;
   void* _rioContext;
   bool _watcher;
   bool _enabled;
   void *_userParam;

   // maintain the interrupts that are already dealt with.
   static tNIRIO_u32 _globalInterruptMask;
   static SEM_ID _globalInterruptMaskSemaphore;
};

}


#endif // __tInterruptManager_h__