source: orxonox.OLD/branches/network/src/lib/network/synchronizeable.h @ 6303

/*!
 * @file connection_monitor.h
    \brief interface for all classes that have to be synchronized
 */

#ifndef _SYNCHRONIZEABLE_H
#define _SYNCHRONIZEABLE_H

#include "base_object.h"
#include "netdefs.h"
#include "converter.h"



#include <vector>
#include <list>

//State constants: They have to be of the form 2^n
#define STATE_SERVER 1
#define STATE_OUTOFSYNC 2
#define STATE_REQUESTEDSYNC 4


//macros to help writing data in byte buffer
/*
 * Important: these macros must be used in
 *     SYNCHELP_READ_*:  virtual void      writeBytes(const byte* data, int length, int sender);
 *     SYNCHELP_WRITE_*: virtual int       readBytes(byte* data, int maxLength, int * reciever);
 * with the same argument names!
 *
 * SYNCHELP_WRITE_BEGIN()
 * SYNCHELP_WRITE_INT(i)
 * SYNCHELP_WRITE_FLOAT(f)
 * SYNCHELP_WRITE_BYTE(b)
 * SYNCHELP_WRITE_STRING(s)
 * SYNCHELP_WRITE_N
 *
 * SYNCHELP_READ_BEGIN()
 * SYNCHELP_READ_INT(i)
 * SYNCHELP_READ_FLOAT(f)
 * SYNCHELP_READ_STRING(s,l) l = size of buffer s
 * SYNCHELP_READ_STRINGM(s)  allocates memory for string! you have to free this after
 * SYNCHELP_READ_BYTE(b)
 *
 *
 *
 * Example 1:
 *  SYNCHELP_READ_BEGIN();
 *  SYNCHELP_READ_FLOAT(size);
 *  SYNCHELP_READ_STRING( textureName, 1024 ); //1024 is the length of textureName
 *
 * Example 2:
 *  SYNCHELP_WRITE_BEGIN();
 *  SYNCHELP_WRITE_FLOAT(this->size);
 *  SYNCHELP_WRITE_STRING(this->textureName);
 *  return SYNCHELP_WRITE_N;
 *
 */
#define SYNCHELP_WRITE_BEGIN()    int __synchelp_write_i = 0; \
                                  int __synchelp_write_n
#define SYNCHELP_WRITE_INT(i) { __synchelp_write_n = \
                                Converter::intToByteArray( i, data+__synchelp_write_i, maxLength-__synchelp_write_i ); \
                                if ( __synchelp_write_n <= 0) \
{ \
                                  PRINTF(1)("Buffer is too small to store a int\n"); \
                                  return 0; \
} \
                                __synchelp_write_i += __synchelp_write_n; \
}
#define SYNCHELP_WRITE_FLOAT(f) { __synchelp_write_n = \
                                Converter::floatToByteArray( f, data+__synchelp_write_i, maxLength-__synchelp_write_i ); \
                                if ( __synchelp_write_n <= 0) \
{ \
                                  PRINTF(1)("Buffer is too small to store a float\n"); \
                                  return 0; \
} \
                                __synchelp_write_i += __synchelp_write_n; \
}
#define SYNCHELP_WRITE_BYTE(b) { \
                                if (maxLength - __synchelp_write_i < 1) \
{ \
                                  PRINTF(1)("Buffer is too small to store string\n"); \
                                  return 0; \
} \
                                data[__synchelp_write_i] = b; \
                                __synchelp_write_i++; \
}
#define SYNCHELP_WRITE_STRING(s) { __synchelp_write_n = \
                                Converter::stringToByteArray( s, data+__synchelp_write_i, strlen(s), maxLength-__synchelp_write_i ); \
                                if ( __synchelp_write_n <= 0) \
{ \
                                  PRINTF(1)("Buffer is too small to store string\n"); \
                                  return 0; \
} \
                                __synchelp_write_i += __synchelp_write_n; \
}
#define SYNCHELP_WRITE_N __synchelp_write_i


#define SYNCHELP_READ_BEGIN()     int __synchelp_read_i = 0; \
                                  int __synchelp_read_n

#define SYNCHELP_READ_INT(i)       { \
                                    if ( length-__synchelp_read_i < INTSIZE ) \
{ \
                                      PRINTF(1)("There is not enough data to read an int\n");  \
                                      return; \
} \
                                    __synchelp_read_i += Converter::byteArrayToInt( data+__synchelp_read_i, &i );  \
}
#define SYNCHELP_READ_FLOAT(f)    { \
                                    if ( length-__synchelp_read_i < FLOATSIZE ) \
{ \
                                      PRINTF(1)("There is not enough data to read a flaot\n");  \
                                      return; \
} \
                                    __synchelp_read_i += Converter::byteArrayToFloat( data+__synchelp_read_i, &f );  \
}
#define SYNCHELP_READ_STRING(s,l)    { \
                                    __synchelp_read_n = Converter::byteArrayToString( data+__synchelp_read_i, s, l );  \
                                    if ( __synchelp_read_n <0 )  \
{ \
                                      PRINTF(1)("There is not enough data to read string\n");  \
                                      return; \
} \
                                    __synchelp_read_i += __synchelp_read_n; \
}
#define SYNCHELP_READ_STRINGM(s)    { \
                                    __synchelp_read_n = Converter::byteArrayToStringM( data+__synchelp_read_i, s );  \
                                    if ( __synchelp_read_n <0 )  \
{ \
                                      PRINTF(1)("There is not enough data to read string\n");  \
                                      return; \
} \
                                    __synchelp_read_i += __synchelp_read_n; \
}
#define SYNCHELP_READ_BYTE(b)      { \
                                    if ( length-__synchelp_read_i < 1 ) \
{ \
                                      PRINTF(1)("There is not enough data to read a byte\n");  \
                                      return; \
} \
                                    b = data[__synchelp_read_i]; \
                                    __synchelp_read_i ++;  \
}

class NetworkStream;


class Synchronizeable : virtual public BaseObject
  {
  public:
    Synchronizeable();
    ~Synchronizeable();

    virtual void      writeBytes(const byte* data, int length, int sender);
    virtual int       readBytes(byte* data, int maxLength, int * reciever);
    virtual void      writeDebug() const;
    virtual void      readDebug() const;

    void setIsServer( bool isServer );
    void setIsOutOfSync( bool outOfSync );
    void setRequestedSync( bool requestedSync );
    bool isServer();
    bool isOutOfSync();
    bool requestedSync();
    inline void setUniqueID( int id ){ uniqueID = id; }
    inline int  getUniqueID() const { return uniqueID; };
    inline void requestSync( int hostID ){ this->synchronizeRequests.push_back( hostID ); }
    inline int getRequestSync( void ){ if ( this->synchronizeRequests.size()>0 ){ int n = *(synchronizeRequests.begin()); synchronizeRequests.pop_front(); return n; } else { return -1; } };
    inline int getHostID() { return this->hostID; }

    inline int getOwner(){ return owner; }
    inline void setOwner(int owner){ this->owner = owner; }

    inline void setNetworkStream(NetworkStream* stream) { this->networkStream = stream; }

  private:

    int               uniqueID;



    //static std::vector<Synchronizeable*> classList;
    int owner;
    int hostID;

    std::list<int> synchronizeRequests;

  protected:
    NetworkStream* networkStream;
    int state;

  };
#endif /* _SYNCHRONIZEABLE_H */