Re: NO_RETURN_VALUE w/ 20040715

[Nate Lawson <nate-Y6VGUYTwhu0@public.gmane.org>]

I don't think that approach will be helpful.  Instead, I think it should 
be "if argument types differ and any arg is an integer, convert the 
other to an integer."  If not, error AE_TYPE.  We have something like 
this in FreeBSD where we found on older systems many methods that are 
supposed to return an integer returned a buffer instead.  So many that 
we added an automatic conversion for this to acpi_GetInteger().  Also, I 
found a system that uses a package of integers for _FDE instead a buffer 
of integers.

In summary, I've seen a lot of buffers used where integers were expected 
but never an integer expected to be converted to a buffer.

-Nate

Moore, Robert wrote:
> I will prototype this using the existing internal mechanisms for
> implicit object conversion.
> 
> However, I'm not sure how or if this statement will work as expected:
> 
> 
>>>>>If (LEqual (Local0, 0x00))
>>>>>{
> 
> 
> since Local0 is a buffer, 0x00 will be converted to a buffer before the
> compare.
> 
> 
> 
>>-----Original Message-----
>>From: Alex Williamson [mailto:alex.williamson-VXdhtT5mjnY@public.gmane.org]
>>Sent: Monday, August 23, 2004 1:34 PM
>>To: Moore, Robert
>>Cc: acpi-devel
>>Subject: RE: [ACPI] NO_RETURN_VALUE w/ 20040715
>>
>>Bob,
>>
>>  Great, I was looking through the history of the LEqual operator
> 
> across
> 
>>the ACPI specs and it got rather convoluted, this seems like a good
>>compromise.  Will there be a CA update to support this (preferably in
>>Linus' tree before 2.6.9 is tagged)?  I'd be happy to test on this box
>>if needed.  Thanks,
>>
>>	Alex
>>
>>On Mon, 2004-08-23 at 13:22 -0700, Moore, Robert wrote:
>>
>>>We are going to update the ACPI spec to something like this:
>>>
>>>*	For the following operators, the data type of the first operand
>>>dictates both the required type of the second operand and the type
> 
> of
> 
>>>the result object.  (The second operator is converted, if necessary,
> 
> to
> 
>>>match the type of the first operand.)
>>>    Concatenate
>>>    LEqual
>>>    LGreater
>>>    LGreaterEqual
>>>    LLess
>>>    LLessEqual
>>>    LNotEqual



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