Re: sc_port, sc_export binding overload and base classes

Jerome, All,

Just for background information for those who missed the first 1666
standardization, you have to realize that the LRM is NOT to be considered
the documentation for the OSCI simulator. The LRM is considered
definitive, and the OSCI simulator (which is outside the scope of this
IEEE group) a proof-of-concept implementation. (Personal note: I will
fight to make sure that the OSCI simulator stays in line with the IEEE
standard, but that is outside the scope of the 1666 WG.)

In writing the LRM, there are several places where the class definitions
differ from the OSCI source code. In particular, we deliberately collapsed
some base classes into their derived classes, considering the actual class
hierarchy of the implementation to be just an implementation artefact.
sc_port_b was one such case.

Cheers,

John A

From:
david.long@doulos.com
To:
Jerome CORNET <jerome.cornet@st.com>
Cc:
owner-systemc-p1666-technical@eda.org, systemc-p1666-technical@eda.org
Date:
03/03/2010 14:57
Subject:
Re: sc_port, sc_export binding overload and base classes
Sent by:
owner-systemc-p1666-technical@eda.org

Hi Jerome,

>Maybe you misunderstood me, just have a look at one SystemC
implementation and class sc_port_b.

OK, I see what you are proposing now. When the current LRM was written,
there was a pretty strong agreement that sc_port_b was a feature of the
OSCI implementation, rather than a class that should be part of the
standard. You are correct that as it stands, operator()(sc_port<IF,N>&) in
the LRM does not reflect the way that the code is implemented in the OSCI
distribution or the behaviour described in clause 5.11.3. I still think
it would be better to find an alternative way to define the port-to-port
binding methods in the LRM rather than adding an additional class but I do
not feel strongly either way.

Regards,
Dave

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