> difference between the implementation of
>
> read(fd,buf,sz)
> and
> fd->CALL(OP_READ,buf,sz)
I might be off track here , but is the second line anyhow related to
object oriented programming ?
Then the difference is mostly in the syntax , because on lower level the
second line get translated to :
read_nr_32( fd , buf,sz)
The correct method/function is choosen and called with the additional
"implicit" parameter , a pointer to the object.
The correct function can be found at compile time or run time,
when using virtual methods.
Now what I understood under sending messages in OS is :
message_type *m;
m = <the contents of the message>
send_message(m [ , destination ] ) ;
So the execution will not neccesarily be transfered to another piece of code.
Just the message would be transfered to some mailbox.
This is ( more or less ) how AmigaOS works. For example a task sends a message to
the filesystem "do this" , the message is sent and the task continues its bussiness.
The filesystem , which is another task , reads the message , does something and
sends a reply.
Well , just some thoughts of mine ...
-- David Balazic , student E-mail : 1stein@writeme.com | living in sLOVEnija home page: http://surf.to/stein Computer: Amiga 1200 + Quantum LPS-340AT--- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/