Do NDK support O_DIRECT flag when open file?

[Ryan Wang]

I am working with a project that need to read file in the SD card
immediately. So I want to use open API with the flag O_DIRECT. Open is
working fine. But when I read the file, it goes error. And the error
code is 22, which means "Invalid argument". I don't know why. Do the
NDK or Android platform support this flag? If support, how to use it.
Thanks.

[David Turner]

Are you sure that your buffers are properly aligned? O_DIRECT has drastic requirements for proper usage.

See the related section at the end of the following page: http://manpages.courier-mta.org/htmlman2/open.2.html

Apart from that, I don't think there is a reason for O_DIRECT to not be supported.

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