aso(3) man page is on line
On Thu, 16 Aug 2012 16:21:52 +0200 =?KOI8-R?B?z8zYx8Egy9LZ1sHOz9fTy8HR?= wrote:
> Phong, how do I use aso to get an exclusive lock/mutex, and release
> it? Can a aso lock/mutex be nested?
> Olga
> On Thu, Aug 16, 2012 at 4:16 PM, Glenn Fowler <g...@research.att.com> wrote:
> >
> > any locking/critical regions will have to use aso
> > because libast itself does not require -l*thread*
> >
> > On Thu, 16 Aug 2012 16:11:16 +0200 =?KOI8-R?B?z8zYx8Egy9LZ1sHOz9fTy8HR?=
> > wrote:
> >> Glenn, is the general plan of putting a openat() emulation into libast
> >> acceptable for you? I found that Roland wrote one in 2004 with threads
> >> in mind, and that it only needs polishing and testing. If you agree to
> >> take it I can spend some time this evening on it.
> >
> >> Olga
> >
> >> On Thu, Aug 16, 2012 at 1:20 AM, Glenn Fowler <g...@research.att.com>
> >> wrote:
> >> >
> >> > On Thu, 16 Aug 2012 01:09:29 +0200 =?KOI8-R?B?z8zYx8Egy9LZ1sHOz9fTy8HR?=
> >> > wrote:
> >> >> Glenn, have you ever considered putting an openat(), fstatat(),
> >> >> mkfifoat() emulation into libast, if the base operating system does
> >> >> not have such calls? I have been trying more tests with the at() apis
> >> >> but I am not happy to trash much of libshell with lots of #ifdef
> >> >> AT_CWD tests if there is a better option.
> >> >
> >> >> AFAIK a lot of the at() calls can be emulated by using
> >> >> /dev/fd/${dirfd}/${path} or /proc/${pid}/fd/${dirfd}/${path}. I just
> >> >> do not know, are there cases where /dev/fd or /proc/${pid}/fd are not
> >> >> available (chroot environments?)?
> >> >
> >> > there are a lot of systems with lame or no /proc
> >> > and it will be hard to work around systems with no O_search
> >> >
> >> > but let me think a bit on that
> >> > if we didn't have to worry about dir fd's across exec (probably rare
> >> > right now)
> >> > we might be able to cache emulated open(O_search) paths with <dev,ino>
> >> > keys
> >> > on systems that don't support /dev/fd/<FD>/<PATH> pr
> >> > /proc/<PID>/fd/<FD>/<PATH>
> >> >> Olga
> >> >> --
> >> >> , _ _ ,
> >> >> { \/`o;====- Olga Kryzhanovska -====;o`\/ }
> >> >> .----'-/`-/ olga.kryzhanov...@gmail.com \-`\-'----.
> >> >> `'-..-| / http://twitter.com/fleyta \ |-..-'`
> >> >> /\/\ Solaris/BSD//C/C++ programmer /\/\
> >> >> `--` `--`
> >> >
> >
> >> --
> >> , _ _ ,
> >> { \/`o;====- Olga Kryzhanovska -====;o`\/ }
> >> .----'-/`-/ olga.kryzhanov...@gmail.com \-`\-'----.
> >> `'-..-| / http://twitter.com/fleyta \ |-..-'`
> >> /\/\ Solaris/BSD//C/C++ programmer /\/\
> >> `--` `--`
> >
> --
> , _ _ ,
> { \/`o;====- Olga Kryzhanovska -====;o`\/ }
> .----'-/`-/ olga.kryzhanov...@gmail.com \-`\-'----.
> `'-..-| / http://twitter.com/fleyta \ |-..-'`
> /\/\ Solaris/BSD//C/C++ programmer /\/\
> `--` `--`
.,
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