[Spread-users] Spread and fork ()
Yair Amir
yairamir at cnds.jhu.edu
Wed Nov 24 08:29:53 EST 2004
Hi,
It seems to me that the following code MAY work and the parent will not
lose messages. I checked this briefly and I don't see a reason for it
not to work. You will need to make SP_kill (which is an internal Spread
library call) declared in the sp_funcs.h
Comments ?
---------------------------------------
parent_spread_handle = spread.connect(...)
parent_spread_handle.join()
...
os.fork()
if child
SP_kill(parent_spread_handle)
child_spread_handle = spread.connect(...)
child_spread_handle = spread.join(...)
rest of child code
otherwise // parent
carry on your merry way
-----------------------------------------
Cheers,
:) Yair.
J C Lawrence wrote:
> On Tue, 23 Nov 2004 18:26:26 -0500
> George Schlossnagle <george at omniti.com> wrote:
>
>
>>That should be safe. What's unsupported is:
>
>
>>spread_handle = spread.connect(...)
>>os.fork()
>>spread_handle.join(...)
>># carry on our merry way
>
>
> Right then. That just leaves a potential race condition for me to
> resolve in terms of messages sent during the window between the
> disconnect and the (re-)connect on the other side of the fork().
>
> Hurm.
>
> --
> J C Lawrence
> ---------(*) Satan, oscillate my metallic sonatas.
> claw at kanga.nu He lived as a devil, eh?
> http://www.kanga.nu/~claw/ Evil is a name of a foeman, as I live.
>
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