Re: strage cthread behavior

[Matej Kosik]

James Morrison wrote:
> 
> --- Matej Kosik <kosik@decef.elf.stuba.sk> wrote:
> > Hi
> >
> > I started playing with hurd. I am trying
> > to gain some experience with `cthread'
> > library now.
> >
> > I wrote following trivial program:
> >
> > ------------------------------------
> > #include <stdio.h>
> > #include <cthreads.h>
> >
> > void child_fnc( int i )
> > {
> >         printf( "slave:0\n" );
> > }
> >
> > int main()
> > {
> >         cthread_t child_thread;
> >         child_thread = cthread_fork( child_fnc, 30 );
> >         printf( "master:0\n" );
> >         cthread_join( child_thread );
> >         printf( "master:1\n" );
> >         return 0;
> > }
> > ------------------------------------
> >
> >
> >
> > if I run it as
> >
> >       ./main
> >
> > it gives me the output
> >
> >       master:0
> >       slave:0
> >       master:1
> >
> > e.g. one of the things which I expected
> >
> > ------------------------------------
> >
> > if I run the same program as
> >
> >       ./main > output
> >
> > the contents of the `./output' file
> > will be (surprisingly)
> >
> >       slave:0
> >       master:1
> >
> > I expected the contents of `./output' file
> > to be the same as the output of the program
> > printed out on terminal.
> >
> > Can somebody please explain it to me?
> 
>  I can't explain it, but the problem is the master:0 does not seem to be
> printed
> anywhere, correct?

yes, it is missing

> 
> =====
> James Morrison
>    University of Waterloo
>    Computer Science - Digital Hardware
>    2A co-op
> http://hurd.dyndns.org
> 
> Anyone referring to this as 'Open Source' shall be eaten by a GNU
> 
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-- 
http://altair.dcs.elf.stuba.sk/~kosik