Re: Pollable Semaphores

[Chris Wright <chrisw@osdl.org>]

* Ulrich Drepper (drepper@gmail.com) wrote:
> On Fri, 21 Jan 2005 23:05:04 -0800, Chris Wright <chrisw@osdl.org> wrote:
> > Yeah, here it is.  I refreshed it against a current kernel.  It passes my
> > same old test, where I select on /proc/<pid>/status fd in exceptfds.
> 
> Looks certainly attractive to me.  Nice small patch.  How quickly
> after the death of the process is proc_pid_flush() called?

I don't think it's called until it's reaped.

> If this could go in and the futex stuff is handled, there is "only"
> async I/O to handle.  After that we could finally create a uniform
> event mechanism at userlevel which binds all these events (I/O,
> process/thread termination, sync primitives) together.  Maybe support
> for legacy sync primitives (SysV semaphores, msg queues) is needed as
> well, don't know yet.  Note that I assume that polling of POSIX
> mqueues works as it did the last time I tried it.

It should, AFAIK nothing there has changed.

thanks,
-chris
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