From: Thomas Hellstrom <thomas@shipmail.org>
To: "Marek Olšák" <maraeo@gmail.com>, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH 1/2] drm/ttm: add a way to bo_wait for either the last read or last write
Date: Sat, 08 Oct 2011 13:32:55 +0200 [thread overview]
Message-ID: <4E9034E7.8070701@shipmail.org> (raw)
In-Reply-To: <20111008112731.GL4605@sci.fi>
On 10/08/2011 01:27 PM, Ville Syrjälä wrote:
> On Sat, Oct 08, 2011 at 01:10:13PM +0200, Thomas Hellstrom wrote:
>
>> On 10/08/2011 12:26 PM, Ville Syrjälä wrote:
>>
>>> On Fri, Oct 07, 2011 at 10:58:13AM +0200, Thomas Hellstrom wrote:
>>>
>>>
>>>> Oh, and one more style comment below:
>>>>
>>>> On 08/07/2011 10:39 PM, Marek Olšák wrote:
>>>>
>>>>
>>>>> +enum ttm_buffer_usage {
>>>>> + TTM_USAGE_READ = 1,
>>>>> + TTM_USAGE_WRITE = 2,
>>>>> + TTM_USAGE_READWRITE = TTM_USAGE_READ | TTM_USAGE_WRITE
>>>>> +};
>>>>>
>>>>>
>>>>>
>>>>>
>>>> Please don't use enums for bit operations.
>>>>
>>>>
>>> Now I'm curious. Why not?
>>>
>>>
>>>
>> Because it's inconsistent with how flags are defined in the rest of the
>> TTM module.
>>
> Ah OK. I was wondering if there's some subtle technical issue involved.
> I've recently gotten to the habit of using enums for pretty much all
> constants. Just easier on the eye IMHO, and avoids cpp output from
> looking like number soup.
>
>
Yes, there are a number of advantages, including symbolic debugger output.
If we had flag enums that enumerated 1, 2, 4, 8 etc. I'd feel motivated
to move
all TTM definitions over.
/Thomas
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next prev parent reply other threads:[~2011-10-08 11:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-07 20:39 [PATCH 1/2] drm/ttm: add a way to bo_wait for either the last read or last write Marek Olšák
2011-08-07 20:39 ` [PATCH 2/2] drm/radeon/kms: add a new gem_wait ioctl with read/write flags Marek Olšák
2011-08-12 17:22 ` Jerome Glisse
2011-08-12 17:21 ` [PATCH 1/2] drm/ttm: add a way to bo_wait for either the last read or last write Jerome Glisse
2011-08-13 20:32 ` Marek Olšák
2011-10-04 11:48 ` Thomas Hellstrom
2011-10-05 2:08 ` Marek Olšák
2011-10-05 5:54 ` Thomas Hellstrom
2011-10-06 22:42 ` Marek Olšák
2011-10-07 8:00 ` Thomas Hellstrom
2011-10-07 13:24 ` Alex Deucher
2011-10-07 14:05 ` Thomas Hellstrom
2011-10-07 14:14 ` Alex Deucher
2011-10-07 13:38 ` Jerome Glisse
2011-10-07 13:42 ` Jerome Glisse
2011-10-07 21:07 ` Marek Olšák
2011-10-07 14:09 ` Thomas Hellstrom
2011-10-07 21:30 ` Marek Olšák
2011-10-08 8:14 ` Thomas Hellstrom
2011-10-07 22:03 ` Marek Olšák
2011-10-24 14:48 ` Thomas Hellstrom
2011-10-24 17:10 ` Marek Olšák
2011-10-24 17:28 ` Thomas Hellstrom
2011-10-24 17:39 ` Marek Olšák
2011-10-07 8:58 ` Thomas Hellstrom
2011-10-08 10:26 ` Ville Syrjälä
2011-10-08 11:10 ` Thomas Hellstrom
2011-10-08 11:27 ` Ville Syrjälä
2011-10-08 11:32 ` Thomas Hellstrom [this message]
2011-10-24 16:42 ` Marek Olšák
2011-10-24 16:47 ` Thomas Hellstrom
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