ZeroCopyHit.h

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/*
    This software is Copyright by the Board of Trustees of Michigan
    State University (c) Copyright 2017.
 
    You may use this software under the terms of the GNU public license
    (GPL).  The terms of this license are described at:
 
     http://www.gnu.org/licenses/gpl.txt
 
     Authors:
             Ron Fox
             Giordano Cerriza
         NSCL
         Michigan State University
         East Lansing, MI 48824-1321
*/
 
#ifndef ZEROCOPYHIT_H
#define ZEROCOPYHIT_H
 
#include "RawChannel.h"
 
namespace DDASReadout {
 
struct ReferenceCountedBuffer;
class  BufferArena;
    
    class ZeroCopyHit : public RawChannel
    {
    private:
    ReferenceCountedBuffer* m_pBuffer; 
    BufferArena* m_pArena; 
    
    public:
    ZeroCopyHit();
    ZeroCopyHit(
        size_t nWords, void* pHitData, ReferenceCountedBuffer* pBuffer,
        BufferArena* pArena
        );
    ZeroCopyHit(const ZeroCopyHit& rhs);
    ZeroCopyHit& operator=(const ZeroCopyHit& rhs);
    virtual ~ZeroCopyHit();
 
    // Support for recycling ZeroCopyHits:
    
    void setHit(
        size_t nWords, void* pHitData, ReferenceCountedBuffer* pBuffer,
        BufferArena* pArena
        );
    void freeHit();
 
    private:
    void reference();
    void dereference();
    
    };
 
} // Namespace.
 
#endif