fork and modifying variables inside the new process

[Kurt M. Dresner]

irb(main):001:0> a = true
=> true
irb(main):002:0> fork do
irb(main):003:1* a = false
irb(main):004:1> end
=> 2525
irb(main):005:0> a
=> true


Why is this so? What is the point of having my mutexes if I can't
manipulate the data anyway?

-Kurt

[mgarriss]

Kurt M. Dresner wrote:

>irb(main):001:0> a = true
>=> true
>irb(main):002:0> fork do
>irb(main):003:1* a = false
>irb(main):004:1> end
>=> 2525
>irb(main):005:0> a
>=> true
>
>
>Why is this so? What is the point of having my mutexes if I can't
>manipulate the data anyway?
>
>-Kurt
>
>
>
>

Fork creates a whole new heavy process. I think you are looking for
Thread. Try something like:

Thread.new {
a = false
}

[Kurt M. Dresner]

The problem is that I want to call exec inside the new process, as well
as being able to send it things like SIGSTOP and SIGCONT.

Is there a way I can do this?

-Kurt

On Sun, Aug 17, 2003 at 07:57:51AM +0900, mgarriss wrote:

> Kurt M. Dresner wrote:
>

> >irb(main):001:0> a = true
> >=> true
> >irb(main):002:0> fork do
> >irb(main):003:1* a = false
> >irb(main):004:1> end
> >=> 2525
> >irb(main):005:0> a
> >=> true
> >
> >
> >Why is this so? What is the point of having my mutexes if I can't
> >manipulate the data anyway?
> >
> >-Kurt
> >
> >
> >
> >

> Fork creates a whole new heavy process. I think you are looking for
> Thread. Try something like:
>
> Thread.new {
> a = false
> }
>
>
>======= End of Original Message =======<

[Kurt M. Dresner]

Actually it turns out I don't need that, I'm ok.

sorry,

Kurt

On Sun, Aug 17, 2003 at 08:09:20AM +0900, Kurt M. Dresner wrote:

> The problem is that I want to call exec inside the new process, as well
> as being able to send it things like SIGSTOP and SIGCONT.
>
> Is there a way I can do this?
>
> -Kurt
>
> On Sun, Aug 17, 2003 at 07:57:51AM +0900, mgarriss wrote:

> > Kurt M. Dresner wrote:
> >

> > >irb(main):001:0> a = true
> > >=> true
> > >irb(main):002:0> fork do
> > >irb(main):003:1* a = false
> > >irb(main):004:1> end
> > >=> 2525
> > >irb(main):005:0> a
> > >=> true
> > >
> > >
> > >Why is this so? What is the point of having my mutexes if I can't
> > >manipulate the data anyway?
> > >
> > >-Kurt
> > >
> > >
> > >
> > >

> > Fork creates a whole new heavy process. I think you are looking for
> > Thread. Try something like:
> >
> > Thread.new {
> > a = false
> > }
> >
> >
> >======= End of Original Message =======<

>
>======= End of Original Message =======<