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Re: New pthread_cond_t and hppa.


On 03/03/2017 08:18 PM, Torvald Riegel wrote:
> On Fri, 2017-03-03 at 19:37 -0500, Carlos O'Donell wrote:
>> Torvald,
>>
>> On hppa we had no free word to use for the newer expanded
>> pthread_cond_t. Since the first four words of pthread_cond_t
>> are going to be "1, 1, 1, 1" in legacy applications it looks
>> like I need to reserve at least one of these lowest bit values
>> for the initializer I use to decide if the old-style structure
>> has been converted or not.
>>
>> What's your take on shaving 1-bit off of __wseq32 or __g1_start32?
> 
> That's possible, but __g1_orig_size might be even easier because there
> are already accessors to it in pthread_cond_common.c.
 
Only the first four 32-bit words are set to {1,1,1,1} by the old static
initializer, so I'd have to rearrange the structure, but it should work.

My question is mostly along the theoretical lines of: What does it mean
if I loose a bit on __g1_orig_size?

-- 
Cheers,
Carlos.


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