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// $Id$
#ifndef ACE_RMCAST_FRAGMENT_H
#define ACE_RMCAST_FRAGMENT_H
#include "ace/pre.h"
#include "RMCast_Module.h"
#include "ace/Synch.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
//! Default fragment size
#ifndef ACE_RMCAST_DEFAULT_FRAGMENT_SIZE
# define ACE_RMCAST_DEFAULT_FRAGMENT_SIZE 1024
#endif /* ACE_RMCAST_DEFAULT_FRAGMENT_SIZE */
//! Fragmentation module
/*!
* Some transports cannot send very big messages, for example UDP
* imposes a limit of 64K, and in practice the limit is even more
* strict than that.
* This class decomposes a message into multiple fragments, using an
* application defined maximum size.
*/
class ACE_RMCast_Export ACE_RMCast_Fragment : public ACE_RMCast_Module
{
public:
//! Constructor
ACE_RMCast_Fragment (void);
//! Destructor
virtual ~ACE_RMCast_Fragment (void);
//! Accessor for the max_fragment size.
/*! There is no modifier, the maximum fragment size is obtained
* using feedback from the lower layers (transport?)
* @@TODO We have not implemented the feedback mechanisms yet!
*/
size_t max_fragment_size (void) const;
/*!
* Only data messages need fragmentation, the control messages are
* all small enough for all the transports that I know about.
* Well, actually for CAN-Bus (Controller Area Network), they may be
* too big, because the max payload there is 8 bytes, but we don't
* play with those in ACE.
*/
virtual int data (ACE_RMCast::Data &data);
private:
//! Current fragment size limit
size_t max_fragment_size_;
};
#if defined (__ACE_INLINE__)
#include "RMCast_Fragment.i"
#endif /* __ACE_INLINE__ */
#include "ace/post.h"
#endif /* ACE_RMCAST_FRAGMENT_H */
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