Re: [PATCHES] Win32 CHECK_FOR_INTERRUPTS() performance tweak

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От Qingqing Zhou
Тема Re: [PATCHES] Win32 CHECK_FOR_INTERRUPTS() performance tweak
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Msg-id djb9vu$1k2p$1@news.hub.org
обсуждение исходный текст
Ответ на Re: [PATCHES] Win32 CHECK_FOR_INTERRUPTS() performance tweak  ("Magnus Hagander" <mha@sollentuna.net>)
Ответы Re: [PATCHES] Win32 CHECK_FOR_INTERRUPTS() performance tweak  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: [PATCHES] Win32 CHECK_FOR_INTERRUPTS() performance  (Andrew Dunstan <andrew@dunslane.net>)
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"Tom Lane" <tgl@sss.pgh.pa.us> wrote
>
> ... so definitely worth fixing for 8.1 if we can convince ourselves
> it's correct.
>

Despite the performance, there is one thing I am not exactly sure. Shall we 
add "volatile" quanlifier to at least pg_signal_queue? The dangerous place 
is PGSemaphoreLock(). If the compiler cache this value somehow, then we are 
in trouble, but the original way (check event directly) does not have this 
problem.

Regards,
Qingqing

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