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Re: PATCH: Eliminate uses of "sleep" in V3 testsuite
On Wed, Jan 05, 2005 at 08:15:40AM -0800, Mark Mitchell wrote:
> Jonathan Wakely wrote:
>
> >But if there's a fifo with no reader, could open(name, O_WRONLY) block,
> >so we don't even get to the seek?
>
> Yes.
>
> As I asid in my earlier posting, the child process used to be necessary,
> before Zack added the "ios_base::in" flag to the parent's call to
> fbuf.open. However, without that flag, V3 calls "open" with "O_WRONLY |
> O_TRUNC" which the HP-UX kernel does not accept on a FIFO.
>
> >As Mark said, using a pipe would avoid these peculiarities of fifos, and
> >the child would be redundant.
>
> The child is redundant anyhow; the parent opens the FIFO for reading and
> writing simultaneously. As Paolo and I have agreed on that, I've
> checked in the attached patch, which should eliminate the timeouts.
Ah yes, of course. I was being slow.
> As you and I agree, we could modify this test to use a pipe, rather than
> a FIFO, but I'm not about to undertake that project.
No, I've already held up this fix long enough with my silly questions.
Thanks for your patience explaining it all to me.
jon
--
"It is seldom that liberty of any kind is lost all at once."
- David Hume