[PATCH] Initialize IO_STATUS_BLOCK for pread, pwrite

Corinna Vinschen corinna-cygwin@cygwin.com
Wed Nov 29 12:36:00 GMT 2017

On Nov 29 13:04, Corinna Vinschen wrote:
> - If you do async IO, you have to handle STATUS_PENDING gracefully:
>   - The IO_STATUS_BLOCK given to NtWriteFile *must* exist for the
>     entire time the operation takes after NtWriteFile returned
>     STATUS_PENDING.  An IO_STATUS_BLOCK fhandler member comes to mind,
>     maybe fhandler_base_overlapped::io_status can be reused.

No, wait.  There can be more than one outstanding aio operations on the
same descriptor.  Therefore the IO_STATUS_BLOCK must be connected to the
aiocb struct one way or the other, becasue only that struct is local to
the aio operation.


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat
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