The attached is a patch to define O_DIRECT by ourselves on Windows,
and to map O_DIRECT to FILE_FLAG_NO_BUFFERING.
There will be a consistency in our support between Windows and other OSes
that have O_DIRECT. Also, there is the following comment that says, I read,
we should do so.
| handle other flags? (eg FILE_FLAG_NO_BUFFERING/FILE_FLAG_WRITE_THROUGH)
Is this worth doing? Do we need more performance reports for the change?
Regards,
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ITAGAKI Takahiro
NTT Open Source Software Center