From: John Dallaway <john@dallaway.org.uk>
To: Bart Veer <bartv@ecoscentric.com>,
Jonathan Larmour <jifl@ecoscentric.com>
Cc: ecos-maintainers@ecos.sourceware.org
Subject: Re: Flash subsystem update
Date: Thu, 19 Feb 2009 14:40:00 -0000 [thread overview]
Message-ID: <499D6F37.7090902@dallaway.org.uk> (raw)
In-Reply-To: <pnk57mk5nn.fsf@delenn.bartv.net>
Hi Jifl and Bart
Jonathan Larmour wrote:
> ... I'm checking in a patch which updates cyg_flash_init to remove
> its argument (I toyed with keeping the argument and deprecating it
> but that seemed the worst of all worlds by hiding the change for any
> existing API users). And the main benefit of doing so is that later
> on we can do:
> #define cyg_flash_init() CYG_EMPTY_STATEMENT
> and there's no overhead, and no API breakage.
and Bart Veer replied:
> Your change to cyg_flash_init() has broken API compatibility for every
> flash-using application that has used the V2 flash branch since it was
> created. It has also broken API compatibility for every application
> that has used the V2 flash API since that was merged into the anoncvs
> trunk. It has also broken API compatibility for every eCosPro release
> for the last four years or so.
So it seems you have opposite perspectives on whether it is preferable to:
a) preserve API compatibility when the flash subsystem switches over to
using a prioritized constructor, leaving legacy support code in place
for the foreseeable future
or
b) break API compatibility now, drawing the attention of developers to
the forthcoming change and providing a route to the complete elimination
of deprecated code in the future
There is no "right answer" here, but I would note that:
* A major new release of the code is the best time to make
forward-looking API changes
* As things stand, breakage to existing application builds will be
trivial to fix at the application level
I suggest we give the other eCos maintainers an opportunity to comment
today. I will defer branching for eCos 3.0 until tomorrow morning.
John Dallaway
eCos 3.0 release manager
next prev parent reply other threads:[~2009-02-19 14:40 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-11 9:07 eCos 3.0 beta 1 punch list #2 John Dallaway
2009-02-13 19:56 ` Bart Veer
2009-02-17 1:29 ` Jonathan Larmour
2009-02-17 9:18 ` Jonathan Larmour
2009-02-17 9:34 ` Flash subsystem update [ was Re: eCos 3.0 beta 1 punch list #2 ] John Dallaway
2009-02-17 22:01 ` Flash subsystem update John Dallaway
2009-02-18 12:47 ` Bart Veer
2009-02-19 0:08 ` Jonathan Larmour
2009-02-19 11:50 ` Bart Veer
2009-02-19 14:40 ` John Dallaway [this message]
2009-02-19 15:13 ` Bart Veer
2009-02-19 20:53 ` Jonathan Larmour
2009-02-20 9:16 ` John Dallaway
2009-02-19 20:31 ` Jonathan Larmour
2009-02-20 12:55 ` Bart Veer
2009-02-20 21:22 ` Jonathan Larmour
2009-02-17 21:07 ` eCos 3.0 beta 1 punch list #2 Bart Veer
2009-02-17 23:10 ` Jonathan Larmour
2009-02-19 0:48 ` Jonathan Larmour
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