Re: thread local should be used

["罗勇刚(Yonggang Luo) " <luoyonggang@gmail.com>]

OK, I understand, cause the pst doesn't return, so the value in it
doesn't matter.

2015-05-08 15:53 GMT+08:00 罗勇刚(Yonggang Luo) <luoyonggang@gmail.com>:
> Does that need to be thread safe for the static state?
>
> 2015-05-08 15:51 GMT+08:00 Jens Gustedt <jens.gustedt@inria.fr>:
>> Hello,
>> certainly not.
>>
>> First of all _Thread_local is a C11 feature, out of reach for a
>> portable library implementation still for some years.
>>
>> Then the requirement that this is a static state per function is a
>> fixed requirement in the standard. No way out of that.
>>
>> Jens
>>
>> Am Freitag, den 08.05.2015, 15:36 +0800 schrieb 罗勇刚(Yonggang Luo) :
>>> 218933012b1f0f052f91ac39ee5cc6daba99237d
>>>  src/multibyte/mbrtowc.c | 4 ++--
>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/src/multibyte/mbrtowc.c b/src/multibyte/mbrtowc.c
>>> index e7b3654..de8d5ae 100644
>>> --- a/src/multibyte/mbrtowc.c
>>> +++ b/src/multibyte/mbrtowc.c
>>> @@ -8,15 +8,15 @@
>>>  #include <errno.h>
>>>  #include "internal.h"
>>>
>>> +_Thread_local static mbstate_t internal_state;
>>>  size_t mbrtowc(wchar_t *restrict wc, const char *restrict src, size_t
>>> n, mbstate_t *restrict st)
>>>  {
>>> - static unsigned internal_state;
>>>   unsigned c;
>>>   const unsigned char *s = (const void *)src;
>>>   const unsigned N = n;
>>>   wchar_t dummy;
>>>
>>> - if (!st) st = (void *)&internal_state;
>>> + if (!st) st = &internal_state;
>>>   c = *(unsigned *)st;
>>>
>>>   if (!s) {
>>>
>>
>>
>> --
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>>
>>
>>
>
>
>
> --
>          此致
> 礼
> 罗勇刚
> Yours
>     sincerely,
> Yonggang Luo



-- 
         此致
礼
罗勇刚
Yours
    sincerely,
Yonggang Luo