[saga-rg] Re: Meeting Notes: Messaging API

[Andre Merzky]

Quoting [Andrei Hutanu] (Nov 22 2005):
> 
> Andre,
> 
> Thanks for the notes!
> 
> >   
> > - read: two step mechanism:
> >   (int   handle, int size) = query_size ();
> >   (char* buffer)           = read (handle, size);
> >
> >   - handle can be zero, if size is known (one step read)
> >   - buffer needs to be allocated by application.  
> >   - if size is zero, the buffer is allocated by the
> >     implementation and returned to be freed by the
> >     application (one step read)
> > 
> >
> This part is a bit confusing .. with the one step read you lose the 
> length of the message?
> it should probably be  (char* buffer, int size) = read () for the one 
> step read ..Or am I reading it wrong..

No, you are probably right.  IIRC, we pinned down two
different semantics for one step read: 

 a) size is known, malloc by application
    (buffer) = read (handle = NULL, size);
    
 b) size unknown, malloc by implementation
    (buffer, size) = read ();

Thanks, Andre.


> Andrei



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