Re: [ns] How to delay a period for simulaton in C?(resume at same point)

[Anaking <anaking@sina.com>]

I'm developing a Queue, it deque a flow according to it's token acquired.
If there is token for one flow but no packet in it's packetqueue, I want to
pretend to transmit a packet so as to give impact to other flows on delay. 
So i want to delay a period and then return NULL packet. 
If I define timeout function, how to return the control to deque function. 
Actually, the timeout function here is doing nothing.  Or is it uneccessary to
return to deque()?

Thanks for your reply. I appreciate your help on this.

On Sun, 18 Jun
2000, you wrote: > Hi,
> 
> Carlos Alberto Kamienski wrote:
> > Hi
> >
> > I don't think it's possible to stop a function and resume later in the
> > same point in simulation time.
> > The way the scheduler schedule events is by calling functions ("handle"
> > function), so that you'll probably have to change your implementation a
> > little bit to get the same effect.
> >
> > Carlos
> 
> I agreed with Carlos, I think ns work as: when there is a next scheduled
> task, it will jump to the task based on the virtual time keep by the
> simulator. So the simulation time is increased from one task to one task and
> not increased continously.
> Thus you can't used sleep( ) to do the job. The time you wake up from sleep
> will not be the same for the simulation time.
> 
> [My suggestion, maybe there are lot of better methods]
> How about split the function you want to stop and resume into two, than
> first function will call the timer.scheduled() for a delay. When the timer
> expired, call your second function to continue your job. (you must keep the
> state variable for the first function if your second function need to
> continue base on some value calculated/?? in 1st function.)
> 
> regards
> Tan Su Wei