[ltt-dev] LTTng-UST tracepoint API updates

[Mathieu Desnoyers]

* Mathieu Desnoyers (mathieu.desnoyers at efficios.com) wrote:
> Hi,
> 
> I introduced the following API changes for LTTng-UST, after receiving
> very appropriate feedback:
> 
>     Tracepoint API change: rename TRACEPOINT_SYSTEM to TRACEPOINT_PROVIDER
>     
>     Eliminates the confusion between the first TRACEPOINT_EVENT "provider"
>     argument and the "TRACEPOINT_SYSTEM", which need to be the same thing.
>     
> and made sure TRACEPOINT_PROVIDER always match TRACEPOINT_SYSTEM by
> adding a compiler warning:
> 
>     Tracepoints: add provider mismatch check
>     
> Finally, rename TP_ARGS to TP_VARS, in preparation for combining
> TP_PROTO and TP_ARGS:
> 
>     tracepoint API change: rename TP_ARGS to TP_VARS
>     
>     In preparation of folding of both TP_PROTO and TP_ARGS into TP_ARGS.
> 
> Hopefully I'll succeed to getting both TP_PROTO and TP_VARS combined
> into TP_ARGS, but even if this does not work out, TP_VARS seems much
> more appropriate than TP_ARGS here.

The API change is completed by the following commit:

commit 63ef26930fe613a266cc69f5089cf643dd59b012
Author: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
Date:   Sun Nov 13 14:07:57 2011 -0500

    Tracepoint API change: combine TP_PROTO and TP_VARS into TP_ARGS, remove _NOARGS macros
    
    New API for tracepoints, combining the TP_PROTO and TP_VARS arguments
    into a single "TP_ARGS" macro. It takes up to 10 parameters (from 0 to
    10). The "_NOARGS" special-case is not needed anymore: it can be
    achieved simply by passing an empty TP_ARGS:
    
      TP_ARGS(),
    
    to the standard tracepoint event declarations.
    
    Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>

Best regards,

Mathieu

> 
> Thanks,
> 
> Mathieu
> 
> -- 
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com