Re: O_ASYNC question

[William Lee Irwin III]

On Wed, Jun 26, 2002 at 04:37:55PM -0500, Amos Waterland wrote:
> The reason that I was interested is that this behavior, if implemented
> for all fd types, would be useful for a scalable user-space
> implementation of POSIX aio.

Linux implements SIGIO for tty's and sockets only.

On Wed, Jun 26, 2002 at 04:37:55PM -0500, Amos Waterland wrote:
> When you say that it is 'not done for files', does that mean that it is
> not done by design, and no plans exist to implement it for files
> (perhaps because completion notification is fundamentally different than
> readiness notification?), or that the work just has yet to be done?
> Thanks.

It is not done by design. Future plans for async I/O implementations do
not appear to involve the SIGIO mechanism.

Cheers,
Bill