OpenSpace/include/openspace/util/syncdata.h

/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2016                                                               *
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 * or substantial portions of the Software.                                              *
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#ifndef __SYNC_DATA_H__
#define __SYNC_DATA_H__

#include <memory>

#include <ghoul/misc/assert.h>
#include <openspace/util/syncbuffer.h>


namespace openspace {



class Syncable {
public:
    virtual ~Syncable() {};

protected:
    friend class SyncEngine;
    virtual void encode(SyncBuffer* syncBuffer) = 0;
    virtual void decode(SyncBuffer* syncBuffer, bool directDecode = false) = 0;
    virtual void applySyncedUpdate() = 0;
};


template<class T>
class SyncData : public Syncable {
public:

    SyncData() {};
    SyncData(const T& val) : data(val) {};

    SyncData& operator=(const T& rhs) {
        data = rhs;
        return *this;
    }

    operator T&() {
        return data;
    }

    operator const T&() const {
        return data;
    }

protected:
    virtual void encode(SyncBuffer* syncBuffer) {
        syncBuffer->encode(data);
    }

    virtual void decode(SyncBuffer* syncBuffer, bool directDecode = false) {
        if (directDecode) {
            syncBuffer->decode(data);
        }
        else {
            syncBuffer->decode(doubleBufferedData);
        }
    }

    virtual void applySyncedUpdate() {
        data = doubleBufferedData;
    };

    T data;
    T doubleBufferedData;
};


} // namespace openspace

#endif //#ifndef __SYNC_DATA_H__