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From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@redhat.com>,
	akpm@linux-foundation.org, Ingo Molnar <mingo@elte.hu>,
	mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org,
	randy.dunlap@oracle.com, wcohen@redhat.com, fweisbec@gmail.com,
	tglx@linutronix.de, jbaron@redhat.com,
	linux-tip-commits@vger.kernel.org, Christoph Hellwig <hch@lst.de>
Subject: Re: trace/events: DECLARE vs DEFINE semantic
Date: Wed, 2 Dec 2009 17:57:36 -0500	[thread overview]
Message-ID: <20091202225736.GA14770@Krystal> (raw)
In-Reply-To: <1259794005.12870.102.camel@gandalf.stny.rr.com>

* Steven Rostedt (rostedt@goodmis.org) wrote:
> On Wed, 2009-12-02 at 17:36 -0500, Masami Hiramatsu wrote:
> 
> > > Or do you (or anyone else) have a better name?
> > 
> > How about renaming DEFINE_EVENT to TRACE_EVENT_CLASS?
> > 
> > DECLARE_EVENT_CLASS(y, ...)	declare an event-class y
> > TRACE_EVENT_CLASS(x, y, ...)	define/declare a trace event x from event-class y
> > TRACE_EVENT(x, ...)		define/declare a trace event x
> > 
> > Thus TRACE_EVENT_* implies that this macro will be expanded
> > to both of definition and declaration.
> > I don't think separating it is good idea from the viewpoint
> > of maintaining code.
> 
> Hmm, what about just:
> 
> TRACE_CLASS - Declares a class
> TRACE_CLASS_EVENT - defines an event for said class
> TRACE_EVENT - Declares a class and defines an event (as is today)

Yep, it looks good! It's self-descriptive and don't require to explain
what the thing is doing each time we refer to it. (however I feel a bit
sad for Fred, Wilma and Barney) ;)

For that semantic, you have my

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

Thanks,

Mathieu

> 
> -- Steve
> 
> 

-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68

  reply	other threads:[~2009-12-02 23:02 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-01 17:18 [PATCH v2] tracing: add DEFINE_EVENT(), DEFINE_SINGLE_EVENT() support to docbook Jason Baron
2009-12-01 17:20 ` Randy Dunlap
2009-12-02 10:42 ` [tip:perf/core] tracing: Add " tip-bot for Jason Baron
2009-12-02 13:52   ` Steven Rostedt
2009-12-02 14:01     ` Ingo Molnar
2009-12-02 14:28       ` Steven Rostedt
2009-12-02 14:43         ` Ingo Molnar
2009-12-02 14:55           ` Steven Rostedt
2009-12-02 16:15             ` Randy Dunlap
2009-12-02 16:27             ` Mathieu Desnoyers
2009-12-02 17:11               ` Steven Rostedt
2009-12-02 18:06                 ` Mathieu Desnoyers
2009-12-02 18:19                   ` Steven Rostedt
2009-12-02 19:01                     ` trace/events: DECLARE vs DEFINE semantic Mathieu Desnoyers
2009-12-02 19:19                       ` Steven Rostedt
2009-12-02 19:34                         ` Randy Dunlap
2009-12-02 22:36                         ` Masami Hiramatsu
2009-12-02 22:46                           ` Steven Rostedt
2009-12-02 22:57                             ` Mathieu Desnoyers [this message]
2009-12-02 23:08                               ` H. Peter Anvin
2009-12-02 23:13                                 ` Steven Rostedt
2009-12-02 23:18                                   ` H. Peter Anvin
2009-12-02 23:15                                 ` Mathieu Desnoyers
2009-12-03  3:24                                   ` Masami Hiramatsu
2009-12-02 23:10                             ` Mathieu Desnoyers
2009-12-03  4:00                               ` Masami Hiramatsu
2009-12-03  4:07                                 ` Steven Rostedt
2009-12-03 13:51                                   ` Masami Hiramatsu
2009-12-03 13:54                                     ` Steven Rostedt
2009-12-03 14:09                                       ` Mathieu Desnoyers
2009-12-03 14:24                                         ` Steven Rostedt
2009-12-03 14:42                                           ` Mathieu Desnoyers
2009-12-03 15:31                                       ` Masami Hiramatsu
2009-12-03 15:56                                         ` Steven Rostedt
2009-12-03 16:11                                           ` Masami Hiramatsu
2009-12-02 20:11                       ` [PATCH][tip/perf/core] tracing: Rename TRACE_EVENT and others to something resonable Steven Rostedt
2009-12-02 20:16                         ` Frederic Weisbecker

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