On Thu, Dec 4, 2008 at 6:21 PM, Jiří Paleček <[EMAIL PROTECTED]> wrote:
> Hello,
>
> these patches enable AIO and listio in tlibio.c for linux, mostly by
> reusing code that is already in tlibio.c, and makes non-blocking
> read()/write() actually work. Also, they change pipeio.c to use this.
> Comments:
>
> Patch 0001 enables aio and other types of io in tlibio.c code. Note that
> this means programs using functions from tlibio need linking with libaio and
> librt
>
> Patch 0002 changes non-blocking io in tlibio, so that it doesn't report
> EAGAIN to the client, but rather waits with select() for the io to become
> available (it would be possible extend this by adding more wait types).
> Also, it makes some minor changes to pipeio to make it work (eg. make
> opening the pipe always block, regardless of non-blocking setting).
>
> Patch 0003 adds a semaphore to pipeio, to ensure all children have opened
> their pipes before reading & writing takes place. This avoids situations
> where one child gets to open the pipe after the parent deleted it (eg.
> because of an error). Also, it should eliminate all empty reads.
>
> Patch 0004 changes error handling in pipeio to interpret every negative
> number as -errno.
>
> Patch 0005 changes the way the end of the test is handled - before, the
> test ended after the last child was dead, but possibly before all data was
> read. The new way is to read all data and only if no data can be read, see
> if the children are dead.
>
> The patches should be applied in sequence.
Thanks. I will look into them shortly.
Regards--
Subrata
>
>
> Regards
> Jiri Palecek
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