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Corinna Vinschen wrote:
On Mar 19 22:53, Mark Geisert wrote:Regardless of which file the code is in, I was thinking I should copy syscalls.cc's pread() contents into aio_read(), for example, to start with. Then add extra param(s) as needed to the fhandler method call as you suggested.That's definitely ok. When I was talking about pread/pwrite in our preliminary discussion on cygwin-patches, I was always talking about the fhandler_disk_file::pread and fhandler_disk_file::pwrite methods in fact, not the syscalls of the same name. I'm sorry I was unclear there :}
[...]
Looks like you're on the right track, just go ahead. We can fix the finer details later.
OK, I've posted a 3-part patch set to cygwin-patches. This is still a WIP so it doesn't yet include what's been decided above. It currently queues async ops to cygthread worker threads.
I plan to update aio_read() and aio_write() to try to launch async ops inline, and only if they fail with ESPIPE would they be queued for worker thread action. (E.g., ops on sockets or other devices without pread/pwrite support.)
I think parts 1 and 2 of the patch set are essentially finished, unless there are issues to be corrected. But part 3 will need some more work done.
Thanks, ..mark
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